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Firmware release notes - Axe-Fx II

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The information on this page supplements the official manuals.

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Quantum 9.00

  • Removed the “Motor Drive” and “Transformer Grind” algorithms and associated parameters from the Amp block. These have been replaced by the new “Speaker Compression” algorithm. This algorithm models the interaction of the power amp with the power compression of the virtual speaker. The “Spkr Comp” parameter controls the amount of virtual speaker compression. This value defaults to 3.0 when the Amp block is reset. It does not get reset when changing the model. If using the Axe-Fx II with a tube power amp and conventional guitar cab you may want to reduce this value to 0.0. The gain reduction meter shows the amount of virtual power compression (select the Spkr Comp knob to monitor the gain reduction). Typical guitar speakers compress between 3 and 6 dB depending upon construction, age, volume, etc. The default value is conservative and yields about 3 dB of compression. Note that the Master Volume control will interact considerably with the Speaker Compression algorithm as will the Presence and Depth controls. Higher values of Master Volume will cause more virtual speaker compression.
  • Improved Delay block. Also reworked the Deluxe Mind Guy, Mono BBD and Stereo BBD delay models based on the improvements.
  • Added “Blackglass 7K” Drive model based on a Darkglass B7K. The model was obtained with the Attack and Grunt switches in the middle positions. The Grunt switch changes the low-cut frequency therefore the Low Cut control can be used to replicate this switch. The Attack switch controls a shelving filter on the input and can be replicated using the Tone control.
  • Minor change to the phase inverter algorithm. source

--- Quantum 8.02

  • Added (at Kirk Hammett’s request) modifier capability to the output compression parameter (“COMP”) in the Amp block (previously named “OUTPUT COMP”).
  • Added five new factory cabs (XL and XL+ only). These custom mixes represent a small sample of the world-class IRs now available from Celestion. The full IR packages can be purchased at their new website: www.celestionplus.com
  • Fixed bug where presets that use a User Cab(s) and were saved under earlier firmware versions might have the incorrect User Cab(s) assigned when recalled on later firmware.

Quantum 8.01

  • All types in the Compressor block now support both Filter and Emph parameters. These parameters control the detector filtering. Filter is a low-cut filter and Emph is a high-frequency emphasis. These parameters can be used to tailor the response of the various compressor types to different material.
  • Fixed minor bug in Amp block output transformer modeling which caused slight attenuation of upper treble frequencies. This results in clearer, more chimey tones.
  • Fixed mistake in “Citrus RV50” amp model.

Quantum 8.00

  • Improved amp modeling. Improves clarity and sounds more “open” especially for non-MV amp models or when the MV is turned up.
  • The bias excursion values for most amp models have been updated based on new measurement techniques. Existing presets will automatically be updated to the new values.
  • Based on user feedback the Amp block Speaker Drive now defaults to zero.
  • Cab block Delay parameters now have 0.001 ms resolution.
  • Increased gain of “Brit Brown” model by 12 dB.
  • Added “5F1 Tweed EC” based on a Fender Eric Clapton Vibro-Champ.
  • Fixed “quantization” noise when Amp block Transformer Drive parameter is set to its minimum value and a lot of gain is applied after the block. This specifically addresses the “Tube Pre” model as the default Transformer Drive is at the minimum.
  • Fixed Amp block Preamp Hardness parameter not “sticking”.
  • Fixed incorrect Modifier mapping in Advanced page of Amp block.

Quantum 7.02

  • Improved Motor Drive algorithm. New algorithm more accurately models the compression of guitar loudspeakers by factoring in the reactive aspects of the compression.
  • The Motor Drive simulation is available in both the Amp block and Cab block now. It is recommended to use the simulation in the Amp block when using an FRFR configuration as the Amp block simulation uses the speaker resonance information in the calculations whereas the Cabinet block uses fixed values. When using a conventional guitar cab, or a hybrid configuration with monitoring via a conventional guitar cab and speaker emulation to FOH, the Motor Drive in the Cabinet block can be used instead. The simulation in the Amp block also has the advantage of being independent of the block’s output Level control.
  • Gain monitoring of the Motor Drive is available on the MIX page of the Cabinet Block and the PWR DYN page of the Amp block. In the case of the Amp block the monitoring is available when the Motor Drive parameter is selected. Note that typical guitar speakers have around 3-6 dB of compression when driven hard with American speakers being on the low end of that range and British speakers being on the high end. Some speakers can exhibit even more compression than this with compression amounts of 8 dB or more depending upon the magnetic materials used and the construction of the speaker motor.
  • The thermal time constant of the virtual voice coil is adjustable using the “Motor Time Const” parameter. Typical guitar speakers are anywhere from 0.05 to 1.0 seconds depending upon the mass of the voice coil and the materials used.
  • Improved Amp block output compressor. New algorithm is more musical and reacts faster to transients. If you are using this in your presets it is recommended to audition your presets and readjust as necessary. The Gain Reduction meter now shows the total gain including the makeup gain.
  • Added Input Diffusion to Multitap block Band Delay, Quad Series, Plex Delay, Plex Detune and Plex Shift types.
  • Fixed Optical and Pedal compressors output level dependent upon Ratio parameter of Studio type. If using these types in existing presets the presets should be auditioned to ensure the volume is correct.
  • Fixed switching between Optical compressor types can cause brief level drop.

Quantum 7.01

  • Added two new “Optical” types to Compressor block. The Optical 1 type is based on classic optical tube compressors famed for their smooth sound. Use before the Amp block to smooth out your licks and increase sustain. Use after the Amp block for instant “Hit Record” sound. The Optical 2 type is similar to Optical 1 but uses a true RMS detector.
  • Added Input Level switch to Pedal and Optical types in Compressor block. Use “Instrument” when compressor is placed before Amp block. Use “Line” when compressor is placed after.
  • Added “Shimmer Drive” type to Drive block.
  • Reduced output level of “Brit AFS100” amp models.
  • Fixed Amp block “Crunch” value not saving.
  • Fixed bug where certain Amp parameters not loading properly when using Global Blocks.
  • Fixed bug where older presets may cause the Amp block to initialize with invalid parameter values potentially causing lockups.

NOTE: Due to the overwhelmingly positive response to Quantum 7.00 support for previous modeling versions has been eliminated. This frees up memory for new features (like the new compressor types), new amps, new cabs and more.


Quantum 7.00

  • Improved phase inverter modeling in Amp block. This provides thicker power amp distortion. New algorithm also includes bias shifting which results in more harmonic spectrum variation with input amplitude. This improves feel, “knock” and creates sweeter single note soloing. The new “PI Bias Shift” parameter controls the amount of phase inverter bias shift. Note that some real amps are “spitty” in nature due to PI bias shifting, i.e. Trainwrecks, and the new algorithm is designed to replicate that behavior accurately. If you find the behavior undesirable reduce the PI Bias Shift value as desired although this will reduce authenticity.
  • Improved output transformer modeling. This results in tighter, less boomy and smoother bass when the virtual power amp is driven hard. Note that this change may be significant and initially alarming with certain amp models. While the new algorithms are much more accurate they may be disconcerting to those who are accustomed to the old algorithms. In these cases the user may want to decrease the Transformer Drive and/or Low Res parameters in the amp block at the expense of accuracy. It is recommended instead, however, to readjust other parameters in the preset (i.e. Drive, BMT, etc.) which will achieve more authentic results.
  • Improved Amp block cathode follower modeling (again). This results in tighter bass and “chunkier” tones. As a result nearly all amp models that use cathode followers have been reworked with updated parameters. It is recommended that the model be reloaded by deselecting and reselecting the desired model which will load the pertinent default values. Models that have benefited the most from this include:
    • Bogfish
    • Brit 800
    • CA3+
    • Cameron CCV
    • Corncob
    • Dizzy V4 Blue
    • Dizzy V4 Silver
    • Herbie
    • Recto1 and Recto2
    • Solo 88, 99 and 100
  • Changed default value of Speaker Drive to 0.5. When selecting an amp model the Speaker Drive parameter will now default to a value of 0.5 which is commensurate with a small amount of speaker breakup. Adjust this value to taste, if desired. If using the Axe-Fx II with a power amp and conventional guitar speakers you may want to reduce this value as the guitar speakers will impart their own distortion.
  • Fixed mistake in preamp compression algorithm.
  • Added “Dirty Shirley 2” amp model based on an earlier version of this amp with some different component values. This model is a little more aggressive than the regular model.
  • Changed “Bludojai Clean” amp model so that “Pre-Amp Bypass” is off (Pre-Amp Bypass actually bypasses the tone stack and increases the gain so it should be more correctly referred to as “Tone Stack Bypass”).
  • Added “Brit 800 #34” amp model based on the “Santiago #34” modifications.
  • Changed taper of Overdrive control in “USA Lead” amp models so that control is not so abrupt.
  • Replaced following OwnHammer factory cabs with new IRs (see Note 2):
    • Cab #57 with “4x12 MAR PR-H55 FULL”
    • Cab #142 with “1x12 DLX P12R Fat”
    • Cab #146 with “4x10 SUPER VERB CTS FAT”
    • Cab #148 with “4x12 MAR PR-M20B FULL”
    • Cab #149 with “4x12 TRAD V60 FULL”
  • Added five new cabs comprised of our favorite mixes from several of our latest cab packs (only available for XL and XL+):
    • 1x12 Class-A 15W Mix
    • 1x15 Vibrato Verb Mix
    • 2x12 Class-A 30W Mix
    • 4x10 SuperVerb Mix
    • 4x12 Greenback Mix
  • Fixed missing feedback network capacitor in all “Recto” models. This results in extended bass response.
  • Fixed mistakes in “Euro” amp models.
  • Fixed mistakes in “Cameron” amp models.
  • Fixed several mistakes in “Shiver” amp models.
  • Fixed mistakes in “Hot Kitty” amp model.
  • Fixed wrong transformer match value in “Citrus Terrier” model.
  • Fixed “Ruby Rocket” and “Ruby Rocket Brt” model names swapped. The amp’s bright switch is logically backwards (bright on is switch down).
  • Fixed input gain slightly too high in “Solo 88 Cln” model.
  • Fixed wrong phase inverter tail resistor and snubber capacitor values in “Brit AFS100” models.
  • Fixed wrong screen resistor value in all “PVH” models.
  • Fixed can’t cancel controller “Learn Mode” in I/O->CTRL menu.
  • Fixed Custom Shift menu error in Pitch block.

NOTES:

  1. This firmware has significant changes to the core algorithms. While every attempt has been made to ensure compatibility with existing presets it is recommended that the amp block be reset by deselecting and reselecting the desired amp model to load the new default values and the preset then auditioned and readjusted as necessary.
  2. Fractal Audio Systems is pleased to announce that our online store will be carrying a new series of OwnHammer Cab Packs containing high-quality IRs for use with the Axe-Fx II, AX8, or Cab-Lab. In addition, OwnHammer has provided five new IRs to replace some of the factory cabs they provided previously, including one free sample from the new, "OwnHammer 412 Mar Green Vintage" available now at http://shop.fractalaudio.com. This pack contains some of the best IRs we've ever heard and is simply a "must have" for vintage 4x12 "Brit Green" tones.

Quantum 6.03

  • Fixed Pitch block Learn function not working if focus is removed from block. Also fixed Learn function not visible in Custom Shift mode.
  • Fixed divide-by-zero in Drive block init causing crashing under certain conditions.

Quantum 6.02

  • Improved speaker overdrive modeling in Amp block. New algorithm captures the “throaty” sound of an overdriven speaker along with the gentle compression. The “Spkr Drv” (Speaker Drive) parameter has been moved to the Spkr tab on the Amp menu. NOTE: If you are using Speaker Drive in existing presets you should audition these presets and adjust the parameter as necessary as the sound and behavior of the algorithm is considerably different than before. NOTE: This change affects all modeling versions as the algorithm is outside the archived modeling functions. I.e. if you change the Modeling Version parameter you will NOT get the old speaker overdrive algorithm.
  • Improved Drive model frequency response accuracy for models based on op-amp architectures. Models now behave with near-perfect accuracy even when Drive control is set to extreme values.
  • Added “Timothy” Drive model based on a Paul Cochrane “Timmy”.
  • Updated “BB PRE” Drive model.
  • Fixed “PI FUZZ” output level too low. The Drive and Level tapers have also been changed so any presets using this model should be auditioned and adjusted accordingly.
  • Fixed wrong capacitor value in “Esoteric ACB” Drive model. Any presets using this model should be auditioned and the model deselected and reselected to reset the internal parameters.
  • Fixed wrong value in “Hipower Jumped” amp model.

Quantum 6.01

  • Updated all models to use an appropriate Preamp Tube Type when selected. I.e. British models will now use the ECC83 when selected.
  • Fixed wrong Preamp Bias default value for Wrecker Express model.
  • Fixed wrong Power Amp Bias default value for several models.

Quantum 6.00

  • Greatly improved Wah block. Two new parameters have also been added: “Coil Bias” parameter allows the user to adjust the DC offset of the virtual inductor. “Low Cut Freq” sets the highpass filter due to the input coupling capacitor. It is recommended that existing presets be auditioned and, in most cases, deselecting and reselecting the desired model to reset dependent parameters.
  • Improved Amp block output transformer to power tube interaction modeling. This results in less “smear” in the overtones when the virtual power tubes are driven into clipping.
  • Improved Amp block plate clipping modeling. New algorithms more accurately replicate the gradual onset of clipping and never fully hard clip resulting in a more dynamic and “open” tone. Note that the increased dynamics may result in some amp models having higher peak volumes which can result in clipping with existing presets. To remedy this simply turn down the Level control in the Amp block.
  • Recalculated Amp block preamp tube parameters. The “12AX7A SYL” (Sylvania 12AX7A) is now the default type as we think it sounds the best.
  • Improved background calculation accuracy for cathode follower parameters.
  • Added Solo 88 tone stack type (the Solo 88 Rhy and Lead models previously used the Solo 100 tone stack which has a different treble taper and load resistance). The Solo 88 Rhy and Lead models now default to that tone stack type.
  • Added Monitor tab to Tone Match block. This tab allows the user to monitor the difference in frequency response in real time. This can be used when matching real amps to identify differences in tone stack response due to manufacturing tolerances, etc.
  • Fixed wrong snubber cap value in Recto 2 amp models. This changes the default High Cut value to 10 kHz.
  • Fixed wrong phase inverter component value in all “Plexi 50W” amp models. Probably not audible though.
  • Fixed bug that could possibly cause crashes/lockups.
  • NOTE: This update will NOT change the sound of existing presets as the amp modeling version will automatically be set to the version when the preset was created. To use the new amp modeling set the Modeling Version parameter in the Amp block to “Latest”. When selecting new amp models the Modeling Version will be set according to the Default Modeling Version in the Global menu. This option is only available on XL and XL+ models.

Quantum 5.03

  • Increased maximum amount of virtual power amp sag in Amp block. The maximum amount of sag is now twice what was previously available. Existing presets will automatically be adjusted to compensate for the increased range of the Supply Sag control, i.e. if the Supply Sag was set to 8.00 it will be adjusted down to 4.00 so as to yield the same amount of sag. High values of Supply Sag can be used to make the feel “easier” and/or replicate the behavior of other products that intentionally exaggerate compression.
  • Fixed duplicate Modifiers (left over from a bug in the original Axe-Edit) possibly not being deleted properly.
  • Fixed volume of “Brit Silver” amp model lower on Latest and Q2.01 modeling versions.
  • Fixed Preamp Bias not retained when Force Default Version is On. Fixed wrong firmware version reported to Axe-Edit.

Quantum 5.02

  • Fixed Force Default Version parameter not working properly.

Quantum 5.01

  • Fixed offset cancellation mistake in amp modeling.
  • Added “Force Default Version” parameter to Global menu. When set to On this forces a preset to use the selected Default Modeling Version upon recall.
  • Rematched PI Fuzz model.

Quantum 5.00

  • Improved preamp tube modeling for tubes driving cathode followers. In models that use cathode followers this results in warmer distortion with smoother decay. The shape of the cathode follower distortion can be adjusted with the new “CF Hardness” parameter found on the Advanced tab in the Amp block.
  • Added “Legato 100” amp model based on a certain famous Carvin Legacy 100.
  • Added “Capt Hook” amp models based on a Hook Captain Classic 34. This amp uses a mu follower which yields a complex distortion with smooth decay. There are six models:
    1. 1A: Channel 1 w/ EQ and Boost switches off.
    2. 1B: Channel 1 w/ EQ and Boost switches on.
    3. 2A: Channel 2 with Edge switch off.
    4. 2B: Channel 2 with Edge switch on.
    5. 3A: Channel 3 with Edge switch off.
    6. 3B: Channel 3 with Edge switch on.
  • Improved diode clipping algorithms in Drive block. As a result the following Drive models have been rematched:
    • Rat Dist
    • Super OD
    • T808 OD
    • T808 MOD
    • Plus Dist
    • Esoteric ACB
    • Esoteric RCB
    • Zen Master
    • Ruckus
  • Fixed tone stack error in Recto 2 amp models.
  • Changed Presence knob taper in Recto1 Norm and Recto2 Vntg models to match actual amps.
  • Changed behavior of Amp block’s Preamp Comp when set to “Ideal” so that compression amount is roughly the same as when set to “Authentic”. If you are using the Ideal setting on a preset you may need to increase the Preamp Comp parameter value.
  • NOTES:
    1. This update will NOT change the sound of existing presets as the amp modeling version will automatically be set to the version when the preset was created. To use the new amp modeling set the Modeling Version parameter in the Amp block to “Latest”. When selecting new amp models the Modeling Version will be set according to the Default Modeling Version in the Global menu.
    2. Due to space limitations in the Mark I/II BOOTROM this firmware is not backwards compatible with presets saved prior to firmware version 15.08. This limitation only exists for the Mark I/II. XL and XL+ still maintain backward compatibility.

Quantum 4.00

  • Improved power tube plate current vs. grid voltage accuracy. New models more accurately reflect how the response is higher order at lower grid voltages and “relaxes” into a lower order response at higher grid voltages. This improves feel when the virtual power amp is overdriven and improves harmonic content accuracy.
  • Note that existing presets will NOT be affected. Any existing preset will have its local Modeling Version (under the Adv tab of the Amp block) adjusted to its previous value. To use the new modeling you will need to set the Modeling Version parameter to “Latest”. Any new presets that are created will use the Modeling Version selected in the Global menu. For example, if an existing preset was using Q3.xx modeling it will still use Q3.xx. To use Q4.00 you would need to set the Amp block Modeling Version to “Latest”. If you create a new preset and the Global menu Modeling Version is “Latest” the new preset will use Q4.00 modeling.

Quantum 3.03

  • Fixed fuzzy Sat Switch behavior on 65 Bassguy and Dweezil’s B-man models.
  • Fixed Supremo Trem model instability if Bright switch turned off.
  • Added “Metallica’s USA IIC++” amp model.

Quantum 3.02

  • Fixed Dynamic Presence affecting wrong frequencies

Quantum 3.00/3.01

  • Improved Amp block output transformer modeling. New model more accurately simulates dynamic core losses and leakage inductance. The “Xfrmr Grind” knob controls the intensity of the effect. Higher values result in more high frequency response and a more “open” sound. Very high values can yield a raspy, spitty tone common in vintage and/or low wattage amps. Modern “big iron” amps tend to have low values. Note that the audibility is dependent upon how hard the virtual power amp is driven and is more noticeable as the MV is increased. Also note that the effect in real amps is highly dependent on the speaker. Some speaker/transformer combinations exhibit significant high frequency dynamic boost while other combinations yield almost none. As always use your ears as the final determinant.*
  • Improved triode plate modeling for cases when plate load is complex.
  • Improved Ruby Rocket models frequency response accuracy vs. Drive knob. Existing presets should be reset by either deselecting and reselecting the amp model or by turning the Low Cut Freq parameter to 10.0.
  • Extended the range of the Amp block Hi Cut Freq parameter to 400 Hz to 40 kHz. As this changes the preset storage format, existing presets will be automatically updated to use default values.
  • Added “Dweezil’s B-man” amp model based on a modified Fender Bassman as used by Dweezil Zappa.
  • Added “Friedman BE/HBE” models based on an original Friedman “Marsha”. These are the original BE/HBE models from firmware prior to 2.03.
  • Fixed wrong default Tube Bias value in Recto1 and Recto2 amp models.
  • Fixed importing Cab blocks from Axe-Edit library not working properly.
  • Note: The Transformer Grind parameter will be set to a default value and the Dynamic Presence parameter will be reset to 0.0 for any presets created with previous firmware.

Quantum 2.04

  • Fixed Tuner configuration menu.
  • Fixed Deluxe Verb Nrm model incorrect gain for Q2.01 modeling.

Quantum 2.03

  • This version firmware allows switching between three firmware versions: Quantum 2.00, 2.01 and 2.02. In the Global menu the “Default Modeling Version” selects which version of modeling to use when choosing a new amp model and when recalling presets made with previous firmware versions. Choices are “Latest” “Q2.01” and “Q2.00”. In the Amp block the “Modeling Version” selects the version to use which can be used to override the default value. Note that changing the Modeling Version in the Amp block will load appropriate default values for the Preamp Hardness, Preamp Bias and Harmonics parameters thereby overriding any changes that may have been made to those parameters. In simple terms: if you want the sound of 2.02 set the Modeling Version to Latest, for 2.01 use Q2.01 and for 2.00 use Q2.00. Note that changing the Default Modeling Version in the Global menu does NOT change the modeling version the amp block is using. It only selects which version the amp block will use when selecting a new amp model or recalling old presets. Otherwise the version will remain unchanged.
  • Re-matched Friedman BE and HBE amp models using a newer reference amp as the original reference amp is an early model and has questionable QC.
  • Added Friedman BE/HBE V2 models based on a Friedman BE/HBE with the Voice switch toggled left. The original models (based on the switch toggled right) have been renamed Friedman BE/HBE V1.
  • Reduced popping when changing Amp block Preamp Bias.
  • Fixed popping when X/Y switching the Cabinet block and one state has a non-zero Sat value for the mic preamp simulator.
  • Fixed Drive block “Plus Dist” type defaulting to wrong clipping type.

Quantum 2.02

  • Fixed some parameters not being recalled correctly when using Global Blocks.
  • Refined preamp modeling. Harmonics value now defaults to zero. Increasing this value softens preamp distortion, if desired.

Quantum 2.01

  • Further improvement of preamp tube models based on measurements. The existing theoretical models, i.e. “Modern”, “Vintage”, etc., have been removed. There are now six extremely accurate preamp tube types: 12AX7A, ECC83, 7025, 12AX7B, ECC803 and EF86. Note that the EF86 type has been normalized to have roughly the same gain as the triode types.
  • Improved power tube saturation modeling. This yields warmer, “tubier” distortion. The PA Hardness parameter is automatically set for each power tube type but may be overridden if desired.
  • Improved tube interaction modeling. A new parameter, “Harmonics”, controls the amount of interaction. Higher values yield softer distortion. The default value is set for each amp model but may be overridden.
  • Improved virtual output transformer saturation modeling.
  • Change “Thru” bypass mode so that effect input is muted. This prevents, for example, delays from creating echoes when engaged.
  • Added “Invert” mic type to Cabinet block. This inverts the signal allowing for interesting effects in conjunction with the delay parameter.
  • Fixed Reverse Delay being modulated slightly for long delay times.
  • Fixed Mr Z MZ-8 amp model sounding “off”.

Quantum 2.00

  • Improved tube modeling. New algorithms uses more accurate plate current formulas based on actual measurements rather than theoretical values. This results in smoother, thicker distortion and better dynamic response.
  • Improved power supply modeling. New algorithms improve sag and feel. For convenience the virtual power supply voltage (B+) can now be monitored on the PWR DYN tab of the amp block. When the Supply Sag control is selected the gain reduction meter will display the supply voltage in dB relative to the idle voltage.
  • Improved cathode bias algorithm for “Class-A” amp models (i.e. Class-A 30W, AC- 20 Dlx, etc). In conjunction with this the Cathode Squish parameter has been repurposed as “Cathode Bias” and controls the value of a virtual cathode resistor. A value of 50% is “optimum” and biases the power tubes at true Class A operation (neglecting any bias shifting due to supply sag, screen droop, etc.). Values greater than 50% increase the resistance and therefore bias the power tubes “colder”. Values less than 50% bias the tubes beyond Class A. In a real amp this would probably destroy the tubes but that limitation does not exist in our virtual amp. Most real amps of this type actually operate far below Class A and the default values for the models will reflect this. Note that the Power Tube Bias value should be set to 1.00 for these amp types (since that parameter controls the grid voltage and the grid voltage is at a maximum in these types of amps). Existing presets will be automatically updated with new default Cathode Bias and Power Tube Bias values.
  • Improved Phaser block CPU usage.
  • Added “Filter Slope” parameter to Cabinet block. This can be used to select between first-order (6 dB/octave) or second-order (12 dB/octave) filters for the Low Cut and High Cut filters.
  • Improved Plexi “Jump” models to account for interaction between Drive controls. Renamed Plexi 50W High amp model to “Plexi 50W Hi 1” (see below).
  • Added “Plexi Hi 2” amp model which is similar to Plexi 50W Hi 1 except the second triode stage has a 0.68uF cathode bypass capacitor. The second bypass capacitor was added in the early 70’s and gives a slightly brighter tone.
  • Added “Plexi 100W 1970” based on a 1970 Marshall 1959SLP 100. This particular amp has a darker, smoother sound than earlier Plexis.
  • Added “Ruby Rocket” amp model based on a Paul Ruby Rocket with the Bright switch in the down position. The existing model has been renamed “Ruby Rocket Brt” to reflect the state of the Bright switch being in the up position.
  • Added “AC-20 12AX7 B” amp model based on an AC-20 Deluxe with the rear switch set to 12AX7 and the Bass/Treble switch set to Bass. The existing models have been renamed AC-20 EF86 B, AC-20 EF86 T, and AC-20 12AX7 T.
  • Added “Spawn Nitrous 1” amp model based on the OD-1 mode of a Splawn Nitro with KT-88 power tubes.
  • Fixed Spawn Nitrous model broken by earlier firmware update. If you are using this model in your presets you should reset the model by deselecting and reselecting the amp type. This model has been renamed “Spawn Nitrous 2” to indicate that it is the OD-2 mode (see above).
  • Fixed wrong default Negative Feedback value in all “Dizzy” models. Note that the Presence control in these models has more range than the actual amp as the amps have a limiting resistor that the models do not have. Turning the Presence all the way up on the real amps is equivalent to around 7-8 on the models.
  • Fixed wrong Bass taper in Recto2 amp models. Previous taper was Log30A. Taper is now Log10A. Existing presets should be auditioned as the amount of bass will be less.
  • NOTE: This firmware represents a significant update in the amp modeling and the amp models themselves. Many models have been redone. Although care was taken to ensure as much compatibility with existing presets as possible, your presets may be altered.

Quantum 1.06

  • Improved screen grid modeling accuracy.
  • Added “Class-A 30W Brt” amp model based on the Bright channel of a non-Top Boost Vox AC30.
  • Added Scene indicator to Output and FX Loop GUI. The ‘A’ Quick Control knob can be used to select the desired scene while in the menu. This facilitates setting output levels in each scene.
  • Fixed wrong cathode follower default values in Class-A 15W TB, Class-A 30W TB, Hot Kitty and Matchbox D-30 amp models. Existing presets will be automatically updated with the new default values.*
  • The range of the CF Ratio parameter has been expanded and all existing presets will have the parameter reset to default values. If you have changed the CF Ratio value in your presets you will need to re-enter the value.

Quantum 1.05

  • Fixed default Preamp Hardness being set to wrong value. Existing presets will be automatically updated to the new default value.
  • Fixed Backup System (XL and XL+ only feature) writing to wrong memory area and overwriting presets

Quantum 1.04

  • Added “Solo 88 Clean” amp model based on the clean channel of a Soldano X-88. All channels are now represented.
  • Added “PVH 6160+ Rhy” amp model based on Channel 1 of a Peavey 6505+ with the Crunch switch depressed and Bright switch out. The existing PVH 6160 II Rhy model has been renamed “PVH 6160+ Rhy B”. Likewise the existing PVH 6160 II Ld model has been renamed “PVH 6160+ Ld”.
  • Improved triode saturation modeling based on new measurements. The new modeling results in more accurate saturation behavior which, in turn, results in smoother overall distortion characteristics and more accurate harmonic content. Due to the new algorithm the default Preamp Hardness value is now 6.0. Existing presets are automatically updated upon recall.
  • Fixed thumping when switching between certain amp models.
  • Fixed Mixer block parameters not being recalled properly from Global Blocks.
  • Fixed wrong cathode cap value in CA3+ Clean amp model.

Quantum 1.03

  • Improved triode grid conduction model. This improves edge-of-breakup tones as it keeps the distortion on the edge of breakup more and improves high-gain tones as it tightens up the bass. Also improves feel and dynamic response.
  • Improved cathode follower model. This improves harmonic accuracy yielding less “glare”, more detailed treble (more “chime”) and more bite. The previous cathode follower model can be selected from the Global menu by choosing a Modeling Version other than 1.03.
  • Added “PVH 6160 II Rhy” amp model based on Channel 1 of a Peavey 6505+ with the Crunch and Bright switches depressed.
  • Fixed Dizzy and Herbie models tone stack topology. This doesn’t result in a significant change in response unless the tone controls are set to extremes (i.e. bass to zero).
  • Fixed wrong default Preamp Bias value in CA3+ Lead amp model.

Quantum 1.02

  • Added “Deluxe Verb Nrm” amp model based on the Normal channel of a Fender Deluxe Reverb. The existing Deluxe Verb model has been renamed “Deluxe Verb Vib” to distinguish that it is modeled on the Vibrato channel.
  • Added “Bludojai Ld 2” amp model based on a Bludotone Ojai with PAB off. The existing Bludojai Lead amp model has been renamed “Bludojai Ld 1” and is based on the Ojai with the PAB on.
  • Added “Double Verb SF” based on the Vibrato channel of a 1971 “Silverface” Fender Twin Reverb.
  • Added “Plexi 50W 6550” based on the High input of a 1972 50W Marshall “Plexi” with 6550 power tubes.
  • Added “FAS Hot Rod” amp model.
  • Replaced factory cabinets 54-56 with selected UltraResTM IRs from ML Sound Lab’s “ML Brit 4x12” collection. If you enjoy these IRs you may purchase the entire collection from our online store.
  • Added “FAS Boost” Drive type. This is a cleanish boost great for boosting vintage amps like Plexis.
  • Added “Deluxe Mind Guy”, “Mono BBD”, “Stereo BBD” and “Lo-Fi Tape” types to Delay block.
  • Fixed unable to select Mixer X/Y state from Page 2 of edit menu.
  • Fixed wrong Drive pot wiring and default Preamp Bias value in Dizzy V4 Blue 3 and 4 amp models.*
  • Fixed wrong default Preamp Comp value in all Dizzy V4 models.*
  • Fixed wrong default power tube bias value in Mr Z MZ-8 model.*
  • Fixed several errors in the Bogfish models.*
  • Fixed wrong Drive pot value in Shiver Lead model.
  • Fixed System backup/restore not working correctly on Mark I/II models.
  • Fixed Fetch Backup Preset and Fetch Factory Preset not working properly on Mark I/II models.
  • Fixed Bit Reduction parameter not listed for Sweep Delay type.
  • Note: Existing presets using these amp models should be reset by deselecting and reselecting the desired amp model.

Quantum 1.01

  • Fixed sending IR to a scratchpad location does not update if using Cabinet 2.
  • Fixed several mistakes in Herbie models.
  • Fixed timeout when backing up system data if preset has high CPU usage.
  • Improved CPU usage.

Quantum 1.00

  • This is the initial release of our “Quantum” firmware. Quantum represents a milestone in amplifier modeling technology. Our new Real-Time Spice (RTS) algorithms offer a degree of accuracy not found in any other product. Below are the significant changes/additions from the previous non-Quantum firmware.
  • Added “Dephase” control to Cabinet block. This parameter controls a sophisticated process that removes the “phasiness” from IRs and can yield a more “in the room” experience. Note that the processing required is extreme and the control can have some lag. No extra CPU usage or audio latency, however, is incurred.
  • New RTS triode models. There are three new triode models based on our new algorithms: 12AX7A (default), ECC83 and 7025. The previous models are still available and may be selected with the Pre Tube Type parameter. Note that the models have all shifted and if you were using a model other than default previously you will need to adjust your preset to the desired model.
  • The “CF Comp” parameter has been renamed “Preamp Comp” to better explain its function.
  • Added new Preamp Compressor Type “Comp Type” parameter to amp block. There is a new menu page that contains Preamp Comp, Comp Type, Dynamics, Preamp Bias and Output Level (the last repeated from other menus for convenience). Preamp Comp Type selects between “Authentic”, which accurately models the compression in a tube amp, and “Ideal” which is an idealized distorting compressor. The idealized type is more focused and has tighter bass whereas the authentic type is bolder and looser. High gain players may prefer the ideal type due to its tight character.
  • Added a new mode to the “Character” controls in the Amp block. A Char Type of “Dynamic” engages an exciting new mode of tone control. This can be used to fatten or scoop the tone as a function of picking strength. For example, set the Type to Dynamic, Char Freq to 450.0, Char Q to 0.7 and Char Amt to 4.0. This will cause the tone to get fatter and thicker as you play hard but without getting honky when playing soft.
  • Added four “JMPre-1” models based on a Marshall JMP-1 rack preamp. The existing “Brit Pre” model was not changed as it is used by several prominent “A-list” artists. Instead, four new models were added. The models with “BS” in the name indicate that the Bass Shift function is engaged. Note that the model defaults to the power amp simulation active. The power amp model is based on a typical Marshall 100W power amp of that era.
  • Added 512 more User Cab slots to XL and XL+ models.
  • Added 20 new Cabinet models (XL and XL+ versions only) from our Universal Noise Studios 4x12 cabinet pack. These IRs are specifically intended to be used in mixes “in the box”. Mix two IRs from each cab for a myriad of sonic textures.
  • Fixed Dry Delay Shift parameter not working in Flanger block. The parameter has been renamed to Dry Delay and works differently (and more intuitively). The parameter now sets the delay time of the dry signal as a percentage of the maximum delay time of the wet signal. For classic thru-zero flanging this parameter should be set to 50%. For interesting new sounds experiment with lower or higher values. Note that this parameter has no effect if Through Zero is set to Off.
  • Fixed smallest LCD font having a smiley face for left bracket character.

19.00

  • Improved many of the Drive models by applying “G3” techniques. Note that this may cause significant changes to the behavior of some models. Of particular note is that the taper of the Drive and Level controls has changed in many of the models and may differ substantially from previous firmware. Models that have been fully converted to G3 models are indicated in the name.
  • Added a new Clip Type to the Drive block. The “Variable” type allows the user to adjust the shape of the clipping using the new “Clip Shape” parameter. Low values of Clip Shape give a smooth, focused tone while high values give a harder, brasher sound.
  • Improved Cabinet block Motor Drive algorithm. The new algorithm more accurately models power compression.
  • Improved Amp block power tube plate current calculation. This results in increased clarity, improved feel/attack and better edge of breakup distortion texture. The default Power Tube Bias values have been updated to reflect this change and existing presets will be updated automatically to the new values.
  • Changed all references to “CK” in the Cab block to “ML”.
  • The Output Compressor in the Amp block now features two modes of operation: Output and Feedback. These modes are set using the new Comp Type parameter. “Output” is the previous type where the compressor acts on the output of the block. “Feedback” also compresses the block output but applies dynamics to the input of the block based on the output compression. The “Comp Clarity” parameter adjusts the bass response of the input dynamics and can be used to add clarity to the bass.
  • Added EQ Location parameter to Amp block. The sets the position of the graphic EQ. The default value of “Post P.A.” places the EQ at the output of the power amp. “Pre P.A.” places the EQ between the preamp and power amp.
  • Increased the maximum Drive available in the Delay block. This allows adding distortion to the echoes when using the Delay block before an Amp block. Existing presets will automatically be updated to reduce the Drive accordingly.
  • Increased the maximum Drive available in the Multi-Delay block. This allows adding distortion to the echoes when using the Multi-Delay block before an Amp block. Existing presets will automatically be updated to reduce the Drive accordingly.
  • Increased Frequency Multiplier range in Ring Modulator block to 0.25-4.0. Existing presets using the Ring Mod should be auditioned to ensure proper operation.
  • “G3’d” the Citrus A30 amp models and 6G4 Super amp model.
  • Improved detector performance in Multiband Compressor.
  • Improved detector performance in Compressor block Dynamics mode.
  • Replaced factory cabs 19, 20, 21, 104, 105 and 127 with “Mic+DI” UltraRes IRs from upcoming “Universal Noise Storage 3” cab pack.
  • Added “5F8 Tweed” amp model based on a 1959 Fender Twin Amp. This particular model is based on Keith Urban’s “#1”. Thank you Keith for allowing us the use of your prized amplifier.
  • Amp block Type dialog now wraps around when using Nav Up or Nav Down buttons.
  • Fixed “Thordendal” amp models referencing wrong default tone stack.

18.12

  • “G3’d” the Blankenship Leeds amp model.
  • Fixed Utility->Preset menu not allowing “Fetch Factory Preset” or “Fetch Backup Preset” numeric entry on Mark I/II models.
  • Fixed switching between Prince Tone and any Recto model causes incorrect Mid control behavior.

18.11

  • This release supports a new preset dump format known as “Preset + User Cab”. This format dumps the preset plus any User Cab IRs used in the preset as a single file. This facilitates sharing presets that use User Cabs. For more information see the Axe-Edit help.
  • Fixed power amp modeling not being disabled if desired.
  • Fixed Citrus Bass 200 amp model producing clicking sound.

18.10

  • Improved Amp block phase inverter model by incorporating effects of power supply sag.
  • Improved Amp block output transformer model by incorporating secondary losses.
  • Improved Amp block power tube transfer functions.
  • Fixed Rotary block not saving bypass state correctly across scenes.
  • Fixed Amp block not saving Bias Excursion time parameters.

18.09

  • Internal release.

18.08

  • “G3’d” the Herbie, Citrus RV50, Badger 30 and USA IIC+ amp models.
  • Added two new USA IIC+ models. There are now four models for this amp:
    • USA IIC+: Pull Bright off, Pull Deep off.
    • USA IIC+ Bright: Pull Bright on, Pull Deep off.
    • USA IIC+ Deep: Pull Bright off, Pull Deep on.
    • USA IIC+ Brt/Dp: Pull Bright on, Pull Deep on.
  • Note that the Pull Bright on the amp’s Volume knob is equivalent to the model’s Bright Switch under the Treble control and the Pull Shift on the amp’s Treble knob is equivalent to the model’s Fat switch under the Mid control.
  • There are now four Preamp Tube Types:
    • Short Plate: an accurate model of a modern “short plate” production 12AX7.
    • Long Plate: an accurate model of a classic “long plate” 12AX7.
    • Modern: An idealized 12AX7 model. This is the same model from version 18.04 firmware. This model is useful for high gain tones that can benefit from the increased clarity and string separation.
    • Vintage: Another idealized 12AX7 model also from version 18.04 firmware. Has a softer breakup than the Modern model. Useful for “vintage” tones where more base nonlinearity is present.

18.07

  • Fixes bug in Cab block where UltraRes IRs weren't processed correctly.

18.06

  • There are now only two Preamp Tube Type options in the Amp block: Short Plate and Long Plate. The Vintage type has been removed. Short Plate is similar to the previous Modern model but has the improved saturation characteristics that were developed for the Long Plate model.
  • Improved power tube grid conduction modeling. This yields better dynamics and edge-of-breakup tones, particularly when the virtual power amp is being overdriven.
  • Added Tap Tempo mode option to Global menu. “Average” averages up to the last ten taps. “Last Two” uses only the most recent two taps to determine the tempo.
  • Added Ducking capability to Quad Tape Delay mode in Multidelay block.
  • Added “LFO Bypass Reset” parameter to Flanger and Phaser blocks. When set to other than “Off” the LFO will be reset to the selected phase whenever the block is bypassed. This allows synchronizing the sweep to the engagement of the effect.
  • Added “Rich Hall” type to Reverb block.
  • “G3’d” the following amp models: TX Star Lead, TX Star Clean, Div/13 CJ.
  • Added “Div/13 CJ Boost” amp model which models the Volume knob pulled out (boost switch).
  • Removed Update Amps All Presets utility because the majority of users don’t seem to grasp the purpose of this function.
  • Fixed Presence network not being updated correctly when switching between certain amp models.
  • Fixed slight midrange dip in Vintage tone stack type.
  • Fixed excessive phase inverter bias in some amp models resulting in fuzzy sound.
  • Fixed certain Drive block models not sounding correct if Tuner Mute is set to other than Off.

18.05

  • Internal release.

18.04

  • Added “Preamp Tube Type” parameter to Amp block. “Modern” (default) selects a triode characteristic representative of modern production tubes. “Vintage” selects a characteristic typical of tubes produced in the 50’s and 60’s. “Long Plate” replicates the softer saturation characteristic of so-called “Long Plate” triodes.
  • Fixed drive network high-pass filter in Amp block not being reset properly when switching between certain models.
  • Fixed wrong Crunch default value and associated constants in Angle Severe amp models.
  • Fixed Pedal Compressor types not compensating for compression amount thereby requiring manual level compensation.

18.03

  • Due to popular demand the Character controls have been returned to the Amp block.
  • Added “Friedman Sm Box” amp model based on a Friedman Smallbox.
  • Fixed System Reset sets USB/DIGI Out Source to Input 1 and USB Buffer Size to minimum.
  • Fixed Amp block Bright and Sat Switch modifiers next to wrong parameter labels.
  • Fixed turning Hi-Cut all the way up on amp models that don’t have a hi-cut network (i.e. Blankenship Leeds) causes crash.
  • Fixed Master Feedback not working in Quad-Series mode of Multitap block.

18.02

  • Internal release.

18.01

  • NOTE: It is possible that the new Word Clock parameter (see below) will be set to SPDIF/AES IN after installation of this firmware. This will result in a “NO INPUT CLOCK!” message appearing on the screen. If so, set the Word Clock value to “Auto” in the I/O->Audio menu.
  • NOTE: The USB Return Level parameter will be unitialized after installation of this firmware. Set the desired USB Return Level via the I/O->Audio menu.
  • This firmware incorporates all-new amp modeling algorithms. With this update the Axe-Fx II now incorporates our “Generation 3 (G3) Amp Modeling Technology”. G3 modeling improves upon our previous modeling with better touch sensitivity, better dynamics, better distortion texture (or “grain”) with less fizz, more crunch and improved frequency response accuracy.
  • Not all amp models have been fully converted to take advantage of G3 modeling as of this release. Those that have been fully ported are indicated by “(G3)” after the model name on the Pre page of the Amp block. Those that have not been fully ported yet will still benefit from the improved algorithms.
  • The Rotary block has been completely revised. It is recommended to reset the block in any existing presets by double-clicking the Bypass button to load the default values. Also, the Rotary block now supports X/Y which simplifies slow/fast switching.
  • Added modifier capability to Compressor block Level control.
  • Replaced some of the factory IRs with UltraResTM IRs from our upcoming Universal Noise Storage 2 Cabinet Pack. These IRs are the first IRs that we have captured using the “Mic + DI” technique which results in IRs with improved accuracy and clarity.
  • Added USB Return Level parameter to I/O->Audio menu. This parameter sets the level of the USB input sent to the main outputs.
  • Fixed Cabinet block room simulation collapsing to mono if Mode is mono and Preamp Type is not None.
  • Added “Word Clock” parameter to I/O->Audio menu. This selects the clock source for the A/D and D/A converters as follows:
    • Auto: uses the internal clock if the input source is Analog or USB. Uses the recovered SPDIF/AES clock if the input is SPDIF/AES.
    • SPDIF/AES IN: uses the recovered clock for all input sources. A valid 48 kHz data stream must be present at the AES or SPDIF input. If a valid stream is not detected the unit will fall back to the internal clock and display "NO INPUT CLOCK!". The SPDIF/AES select must be set to the appropriate value, i.e. if the data stream is input to the XLR jack then SPDIF/AES SELECT must be set to AES.

18.00

  • Internal release to support Axe-Fx II XL+ model.

17.04

  • Improved power amp modeling. This results in better touch sensitivity, more explosive dynamics and improved low note clarity when the virtual power amp is driven hard.
  • Improved power amp cathode squish accuracy by accounting for dependency on bias point.
  • This version adds a new method of capturing User IRs: “Mic + DI” method. The method used to capture IRs is set in the Global menu. Mic Only is the traditional method and uses a single input into Input 2 Left as the response from which the IR is derived. Mic + DI uses both Input 2 Left and Input 2 Right. The mic response (i.e. preamp output) is input into Input 2 Left as usual while the output of a DI box (or DI output on an amp) is input into Input 2 Right. Both responses are captured and the response from the Right input is used to correct the response from the Left input. This accomplishes the same thing as using Reference Compensation in Cab-Lab but is done at capture time rather than during post-processing. The advantage to the Mic + DI technique is that it allows almost any amp to be used. A flat, solid-state amplifier is not required. Any amp, whether solid-state or tube, with or without integrated preamp can be used. For example a tube guitar head can be used as the “power amp”. You can even plug right into the front of the head (as opposed to using the power amp input or effects return), even if the head is set to heavy distortion. The unique capture technique of the Axe-Fx removes any distortion from the measurement and completely separates the amp response from the speaker response yielding a pure and accurate IR. To use the Mic/Line + DI method do the following:
    1. Connect the line output of your mic preamp to Input 2 Left.
    2. Connect a DI box between the amplifier output and speaker input. Be sure to use a DI box that is specifically designed to work with speaker level signals and one that does not have any on-board cabinet emulation. You can also use the DI output of your amp if it has one as long as it is not a speaker emulated output.
    3. Connect the output of the DI box to Input 2 Right.
    4. Connect Output 2 Left of the Axe-Fx to the input of the amp.
    5. Set the IR Capture Method in the Global menu to Mic + DI.
    6. Set the Input 2 Mode in the I/O->Audio menu to Stereo.
    7. Capture the IR as usual either using the front panel or Cab-Lab.
  • Suitable DI boxes include:
    • Suhr ISO Line Out Box
    • Pro Co DB1
    • Whirlwind Director
    • Whirlwind Direct2
    • ART ZDirect
    • Behringer Ultra-DI DI100
    • Behringer Ultra-G GI100 (with cab emulator off)
    • Behringer Ultra-DI DI600P
  • Superior results may be obtained using the line out of an attenuator with the attenuation turned off since the frequency response will typically have more low frequency extension than common DI boxes.
  • Some amps have DI or slave outputs that are simple resistive dividers and work great for this purpose. These include:
    • Mesa Boogie Mark IV/V
    • Mesa Rectifier Series

17.03

  • Improved power amp screen grid and anode voltage dependence calculations. This results in more “open” tone and improved dynamic response especially when the virtual power amp is overdriven. This has necessitated changes to the default Cathode Squish value for the some models. Existing presets will have the Cathode Squish value updated automatically upon recall.
  • Added “65 Bassguy Bass” amp model. This is the bass channel of an AB165 Bassman. The existing “65 Bassguy” model has been renamed “65 Bassguy Nrml” to indicate that it is the normal channel.
  • Added “Vibra-King Fat” amp model.
  • List menus now wrap at limits when using up or down Nav buttons for easier access to parameters at the opposite end of the list.
  • Fixed Mr Z Hwy 66 model gain dropping if Drive set above 9.5.
  • Fixed wrong stage gain in Deluxe Verb amp model.
  • Fixed wrong triode plate voltage in 1987X models.
  • Fixed wrong B+ capacitor value in 1959SLP and Plexi 100W amp models.
  • Fixed wrong transformer matching value and wrong coupling capacitor value in Citrus Terrier model.
  • Fixed various errors in the Suhr Badger models. Re-MIMIC’d models accordingly. Note that these amps do not have Hi-Cut controls and the Hi-Cut control in the model is therefore non-functional.
  • Fixed wrong Tone pot value in Ruckus model in Drive block.
  • Fixed Hold in Ping-Pong Delay not working properly. Note that this fix will increase the level of the echoes in existing presets.

17.02

  • Low Cut and High Cut have been extended to the Quad-Tap and Quad Tape types in the Multidelay block. These parameters control highpass and lowpass filters which filter the feedback from all the delay lines in contrast to the individual bandpass filters on each delay line. This allows quick and easy creation of bandlimited delays.
  • Added Drive parameter to Quad-Tap and Quad Tape types in Multidelay block.
  • The behavior of the Feedback parameters in the Quad-Tap and Quad Tape types in the Multidelay block has been improved. The feedback is no longer constrained to sum to 100%. Instead the total feedback is calculated and then normalized to 100% if the total exceeds 100%. This allows easier control of the feedback values.
  • Fixed VU Meter in Cab block not working when two instances of the Cab block are present.
  • Fixed excessive CPU use if modifier connected to certain parameters in Chorus and Flanger blocks.
  • Fixed Edited LED not lighting if Amp block Level changed from Utility menu’s VU page.
  • Fixed wrong Hi Cut (Brilliance) pot value in Hot Kitty amp model.
  • Fixed wrong Low Cut frequency in Fox ODS II model. The two Fox models have been renamed “Fox ODS” and “Fox ODS Deep” respectively with the latter indicating that the Deep switch is activated. It should be noted that both models are modeled with the Preamp Bypass (PAB) active.
  • Fixed FAS Brootalz model using wrong feedback network.
  • Fixed using Air controls in Cab block along with Preamp models causes phase issues.
  • Fixed USB audio output level fluctuating during preset changes.
  • Fixed remote IR capture (Cab-Lab) brings up wrong page in Utility menu.
  • Added “Mr Z Hwy 66” amp model.
  • Added “Super 6G4” amp model.
  • Added “Concert 6G12” amp model.

17.01

  • Internal build.

17.00

  • Added preamp simulation to Cabinet block. The simulations recreate the sound of overdriven channel strips, preamps, tapes, etc. The Drive parameter controls the gain of the simulation. The Sat parameter controls the ratio of even/odd harmonics. The Preamp Mode parameter (on Page 2) allows selecting between Economy and High Quality modes. In High Quality mode oversampling is employed to prevent aliasing but this results in higher CPU usage.
  • Added “3 Band Console” types to Graphic EQ and Amp blocks.
  • Added “Fast RMS” detector type to Multiband Compressor.
  • Added “SDD Preamp”, “FET Preamp” and “Ruckus” types to Drive block.
  • Changed Cabinet Type parameter behavior so that the value wraps around at limits.
  • The Flanger block has been completely rewritten. The new algorithms now model the behavior of classic bucket-brigade device (BBD) units (except they are true stereo). Any existing presets will need to be auditioned and possibly edited. The Depth parameter works somewhat differently now and sets the maximum delay time (up to 20 ms). When Auto Depth is not off the maximum delay is reduced as the rate is increased. There are now three Auto Depth values: Low, Medium and High. Turning Auto Depth to Off allows complete control over the delay time. The minimum time is set by the Delay parameter and the maximum time is set by the Depth. Several new Flanger types have been added which demonstrate the new algorithms.
  • The Chorus block has a new algorithm based on the BBD algorithm developed for the Flanger block. All the “Analog” chorus types now use this algorithm. Several new types have been added which demonstrate the new algorithms.
  • The EQ page of the Amp block now supports changing the EQ Type using the Up/Down Nav buttons. The type of EQ will be briefly displayed after it has been changed. The type is also briefly displayed when first switching to that page.
  • Added “DYN EQ” GUI page to Amp block. This page now holds the Dynamic Depth, Dynamic Presence, Character Amount (Char Amt, previously named “Character”) and Character Freq parameters as well as two new parameters: Character Type and Character Q. Character Type selects between a shelving behavior or a peaking behavior. The previous behavior was always shelving. Character Q controls the bandwidth of the response when the peaking behavior is chosen. The Character parameters now control a powerful dynamic equalizer that can be used to achieve tones and feel impossible with a real amplifier. Negative values of the Character Amount along with a peaking behavior result in midrange scoop where the scoop increases as you play harder. Positive values result in a midrange boost as you play harder. Experiment with the frequency, Q and amount to achieve interesting dynamic response.
  • Added VU meters to Utility menu. The meters show the relative loudness of the channels. These readouts can be used to help set preset levels to the same apparent volume. For convenience the level of the Amp blocks can be set from this page. Also, the value of the Output Level knobs is displayed in this page for reference (note that this is only for reference and does not affect the VU meters as the measurement is prior to the Output Level potentiometers).
  • Added “1959SLP Jump” amp model.
  • Added “FAS Modern III” amp model. Similar to a Recto but with tighter bass and a cathode-biased power amp.
  • Added shortcut to Ref Solo in first page of Tone Match block. Pressing the Down button will toggle the Ref Solo value allowing one to switch between the reference sound and the local (user) sound with the press of a button.
  • The level of the USB input signal when NOT routed to the input (when Main Input Source is NOT set to USB) has been reduced by 6 dB to prevent clipping when playing along with tracks that have been mastered at very high levels (near 0 dBFS).
  • Improved Amp block power supply modeling by accounting for DC sag due to quiescent bias currents.
  • Changed name of “ODS-100 Lead” and “ODS-100 Lead Mid” to “ODS-100 HRM” and “ODS-100 HRM Mid” respectively to indicate that they are based on the “HRM” version of the ODS circuit. The names of the “ODS-100 Lead 2” and “ODS-100 Lead 3” models have been changed to “ODS-100 Ford 1” and “ODS-100 Ford 2” respectively to indicate that they are based on the “non-HRM” version of the ODS circuit.
  • Fixed minor math error in Amp block transformer matching calculations.
  • Fixed wrong CF Comp value in Solo 100 amp models.
  • All the ODS-100 models have been redone and re-MIMIC’d based on errors found in the models (wrong negative feedback values).
  • Added “ODS-100 Ford MD” model which is the same as ODS-100 Ford 1 but with the Mid switch engaged.
  • Added “Rumble HRM” tone stack type which is based on a plate-driven Plexi-style tone stack found in a Dumble “Hot Rubber Monkey” amplifier.
  • An exact solution has been implemented for the power amp feedback network in the “USA” amp models. As such all these amp models have been redone accordingly with the exception of the “USA Pre” amp models which use a more conventional power amp model. Any presets using these amp models should be reset either by deselecting then reselecting the amp model or by using the “Update Amps Default” in the Utility->Preset menu. Note: due to the unique topology of the feedback network in these amps the Depth control is non-functional.
  • A “Presence Shift” switch has been added to certain “USA” amp models (those based on amps with a “Pull Shift” on the Presence knob). This switch is found under the Presence control and replicates the behavior when the Presence knob is pulled out on these amps. Note that the behavior of this switch is authentic and may result in volume reduction when active since the negative feedback is increased which lowers the loop gain.
  • Replaced the two 4x12 “Kalthallen” cabs with two UltraRes samples from Cab Pack 7.
  • Fixed several wrong values in Fox ODS amp models.
  • Fixed wrong value on input plate network in PVH 6160 II model.

16.04.1

  • Fixed setting Diffusion Time to maximum in Delay block causes crash.

16.04

  • Fixed attaching modifier to Reverb Hold parameter uses excessive CPU.
  • Fixed setting Reverb Echo Density to less than ‘8’ in High Quality mode causes ringing.
  • Fixed attaching modifier to Reverb Pre-Delay attaches to Input Gain instead.
  • Added 1959SLP Normal and Treble amp models based on a Marshall 100W “Super Lead Plexi” model no. 1959.
  • Added “Dizzy V4 Slvr” amp models which are based on the silver-faced version of a Diezel VH4. The existing models have been renamed “Dizzy V4 Blue” as they are based on a blue-faced version.
  • Tweaked the Large Hall reverb type slightly.
  • Added several new reverb types.

16.03

  • Improved Reverb block. There are now two “Quality” options in the Reverb block: Normal and High. Normal quality CPU usage is similar to previous firmwares whilst still providing improved sound quality. High quality uses significantly more CPU but provides world-class reverberation algorithms. There are several new parameters associated with the new algorithms:
    • Early Diffusion: This sets the amount of diffusion in the early reflections. Higher values result in fuzzier and less distinct echoes. Lower values result in sharp, distinct reflections.
    • Early Diff Time: This scales the delay time of the early reflections diffusers. Adjust this control to suit the size and character of the simulated environment.
    • Early Decay: This parameter controls the decay rate of the early reflections. Higher values yield faster decay.
  • The Tail Delay parameter has been removed as it is not compatible with the new algorithms. The reverb tail is now automatically set to the appropriate delay. In High Quality reverb mode an additional parameter is available: Late Input Mix. This parameter controls the mix between the (possibly diffused) input and the early reflections data input to the late reverb algorithm. Thus this parameter mixes the output of the diffuser and the early reflections prior to inputting that data to the late reverb generator. With the Late Input Mix at 0% the High Quality mode is identical to the Normal Quality mode. Values greater than 0% mix early reflections data into the late reverb using a proprietary decorrelation technique which eliminates any metallic qualities associated with the typical diffuser techniques used in other products.
  • Improved Reverb types based on the new algorithms. Several new types have been added.
  • Increased maximum Reverb Time to 100 seconds and added a Hold function. When Hold is activated the wet input to the block is muted and the Time is set to infinity. This can be used to achieve pad sounds and drone notes/chords.
  • Added stereo UltraResTM capability to Cabinet block. To utilize this feature set the Mode parameter to “Stereo UltraRes”. When in this mode non-UltraRes IRs are processes in normal resolution whereas UltraRes IRs are processed using the UltraRes engine.
  • Four of the factory cabinet IRs have been replaced with newly acquired UltraResTM IRs. These are factory cabs 69-72 (Kalthallen V30 cabs). These IRs are available on the internet from Kalthallen’s website. For reference the four cab filenames are:
    • 028c-SM7-V30-4x12.dat
    • 029c-SM7-V30-4x12.dat
    • 030c-SM7-V30-4x12.dat
    • 031c-SM7-V30-4x12.dat
  • Improved “Pedal Comp 2” compressor algorithm.
  • Fixed several errors in the Mr Z MZ-38 model.

16.02

  • Improved Amp block output transformer modeling. New algorithm more accurately simulates effects of inter-winding capacitance and the resulting load on the virtual power tubes. This results in improved high frequency response. Tones have more “chime” without being harsh. This is especially noticeable for amps with low negative feedback or when the Presence is turned up high.
  • Added Slope parameter to SPKR page in Amp block. This parameter allows fine adjustment of the high-frequency impedance of the virtual voice coil (which affects the slope of the impedance curve). A speaker voice coil is “semi-inductive” due to eddy current losses in the motor. This presents an impedance to the power amp that isn’t fully inductive nor fully resistive. The amount of resistive loss varies by brand and type. Reducing the Slope simulates a speaker that is less inductive, increasing Slope simulates a speaker that is more inductive. Typical speakers range from 3.0 to 4.5 with the median being about 3.7. Lower values yield greater midrange while higher values are more scooped and sizzly.
  • Improved Compressor block by adding a new dynamics processing algorithm. The block has been renamed Comp/Dynmc in light of this. There are now four types of dynamics algorithms: Studio Compressor, Pedal Compressor 1, Pedal Compressor 2, and Dynamics. The Dynamics algorithm allows compression or expansion with a single control. When the Dynamics parameter is set to negative values the block compresses the signal, when set to positive values the block expands the signal.
  • Added “Fast RMS” Detector type to Studio Comp type in Compressor block. This detector type mimics the fast detectors in classic rack-mount compressors.
  • Added “Dynamics” control to amp block. This parameter controls a dynamics processor that can be used to alter the dynamic response of the amp algorithms. When set below zero the amp compresses resulting in a smoother, less dynamic sound. When set greater than zero the amp expands resulting in a punchier, crunchier and more dynamic sound. Note that extreme values can have undesirable side-effects such as pumping and clipping.
  • Added AC voltage control to Amp block. This parameter, called “AC Voltage (Variac)” in the Advanced menu sets the relative AC line voltage into the amp simulation implementing a virtual “Variac”. Note that normally the volume would vary with the Variac setting in a real amp but the simulation compensates for the volume change by applying the inverse. This mitigates having to manually compensate using the Output Level.
  • Improved Noise Gate. The noise gate now features two types: “Classic” and “Intelligent”. The Classic type is unchanged from previous firmwares and is a basic downward expander. The Intelligent type features faster and more stable gating along with a proprietary noise reduction algorithm.
  • Added ducking to Reverb block. The ducking works analogously to the ducking in the Delay block.
  • Added “Class-A 30W Hot” amp model based on a Vox AC30HW with the Hot/Cool switch in the Hot position.
  • Moved Spkr Drive parameter in Amp block to Advanced menu page.
  • Fixed Angle Severe models oscillating if Presence turned way down.
  • Fixed wrong Low Cut Freq in AC-20 Dlx Treb model.
  • Fixed several errors in the Citrus Terrier amp model.
  • Fixed Global menu Reverb Mix value display being overwritten.

16.01

  • Improved Drive block algorithms for types based on the Tube Screamer.
  • Fixed thumping when switching amp types.
  • Fixed crackling when running two instances of the same amp.

16.00

  • Improved Amp block cathode follower model. New model includes effects of grid resistance which results in more accurate clipping characteristics.
  • Improved Amp block virtual power tube model. Improved algorithm more accurately models plate current vs. grid voltage yielding a more accurate transfer function which results in more pleasing power amp distortion and improved feel.
  • Improved Amp block virtual power tube interaction with virtual output transformer. This yields improved low-frequency accuracy and feel. Furthermore this improves the output waveform accuracy resulting in much improved interaction with the cabinet block. IRs should now sound fuller and more resonant with more “thunk” and “knock”. The Low Res parameter in the Spkr tab can be used to increase or decrease the amount of knock.
  • Added Power Amp Hardness parameter to Amp block. This parameter controls the hardness of the virtual power tube grid clipping. Models default to “Medium” and any presets created with earlier firmware versions will be set to Medium upon recall.
  • Changed Layout grid navigation so that wraparound does not occur when using Left/Right nav buttons. Up/Down nav buttons will still wrap around allowing easy access to the beginning/end of the grid. Also, the previously highlighted block will be selected when moving into the grid from the Input or Output blocks using the Left/Right nav buttons.
  • Fixed attaching modifier to Crossover block XOVER FREQUENCY overwrites parameter value display in other blocks.
  • Fixed wrong default Presence value for USA Sub Blues amp model.

15.07

  • Added Preset Decrement functionality to Pedals. On the XL, this allows using one pedal to increment the preset and the other pedal to decrement.
  • Fixed attaching modifier to Noisegate Threshold causes overwrite of parameter text in other blocks.
  • Fixed Compressor, Gate, Graphic EQ, Parametric EQ and Pan/Tremolo blocks bypass mode not sticking for a scene if that scene is using a different X/Y mode than the other scenes.

15.06

  • Fixed wrong frequency labels for “5 Band (Mark)” EQ type in Amp block.
  • Fixed Parametric EQ block band 4 selecting wrong filter type on presets created with certain firmware versions.
  • Fixed Clip LEDs not lighting under certain combinations of I/O settings.
  • Fixed reporting wrong version number to Axe-Edit.

15.05

  • Fixed Master Q defaulting to 0.1 for older presets.

15.04

  • Added “Lowshelf 2” and “Highshelf 2” EQ types to Filter and Parametric EQ blocks (in the Parametric EQ block these are referred to as “Shelving 2” types). These types recreate the analog shelving filters found on classic mixing consoles. These filters are somewhat quirky and exhibit “overshoot” which gives them a certain musical quality. Set the Q between 0.5 and 0.707 to recreate those classic sounds or experiment with the Q for different amounts of overshoot. These filter types are great for getting that massive sound associated with passive equalization.
  • Added selectable filter types to bands 2 and 4 in the Parametric EQ block. These bands can now be set to Peaking, Shelving or Shelving 2 types (where Shelving 2 selects a Lowshelf 2 for band 2 and a Highshelf 2 for band 4).
  • Added various “Passive EQ” types to Graphic EQ and Amp blocks. These EQ types are modeled after classic analog EQs and specifically tuned for guitar amp equalization.
  • Added “Master Q” parameter to Graphic EQ block. This parameter adjusts the Q of all bands. A value of 1.0 sets the Q to the default value (typically one octave). Lower values increase the bandwidth and overlap of each band, higher values decrease the bandwidth.
  • Added runaway feedback protection to Tape Delay algorithm when Drive is set to zero.
  • Moved Noisegate and Main Output edit menus in Layout page. To enter these menus select the “In/Gate” or “Output” blocks in the layout grid and press Edit. The Layout grid now “wraps around” as well.
  • Added Modifier connectivity to Threshold and Ratio parameters in Noisegate.
  • Fixed 5153 Blue amp model causing lockups.
  • Added 256 more preset locations for Axe-Fx II XL models (768 total).

15.03

  • Improved Amp block Dynamic Depth algorithm. The new algorithm uses the low- frequency speaker information from the speaker page to set the inverse-homomorphic filters resulting in a more musical control.
  • Improved Amp block cathode follower. New algorithm includes loading on previous triode plate and resulting effect on distortion characteristics.
  • Improved Reverb block. New early reflections algorithm results in more lifelike spatial immersion. Most Reverb types, however, have the Early Level set fairly low so this may not be readily apparent. Increasing Early Level will increase the relative amplitude of the early reflections.
  • Added Stereo Width control to Reverb block. This can be used to reduce the apparent stereo separation.
  • Added “Brit AFS100” amp models based on a Ma-