October 2024: Fractal Audio's VP4 Virtual Pedalboard has been added to the wiki.

Difference between revisions of "Realtime Analyzer block"

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__TOC__
 
__TOC__
  
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[[image:RTA.png|125px]]
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=Realtime Analyzer block=
  
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=Available on which Fractal Audio products=
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'''Axe-Fx III''': 1 block, no channels<BR>
 +
'''FM3''': n/a<BR>
 +
'''FM9''': n/a<BR>
 +
'''VP4''': n/a
  
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* '''Axe-Fx III''': 1 block
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'''Axe-Fx II''': n/a<BR>
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* '''Axe-Fx II''': no
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'''AX8''': n/a<BR>
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* '''AX8''': no
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'''FX8''': n/a
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* '''FX8''': no
 
  
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=X/Y and channels=
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=About the RTA=
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* '''Axe-Fx II''': no
 
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* '''Axe-Fx II''': n/a
 
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* '''AX8''': n/a
 
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* '''FX8''': n/a
 
  
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=About the RTA=
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The RTA block is available on the Axe-Fx only.
 +
 
 +
<blockquote>'''FRACTAL AUDIO QUOTES'''<HR>
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<blockquote>
 +
[https://forum.fractalaudio.com/threads/rta-fourier-transform.181666/post-2227267]
 +
The RTA is a Fourier Transform.
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</blockquote>
 +
 
 +
<blockquote>
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[https://forum.fractalaudio.com/threads/does-the-real-time-analyzer-block-have-a-viewing-slope.185972/post-2299540]
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The RTA block is a "constant Q" analyzer. White noise increases by 3dB/octave. The two tones are equal in amplitude. Therefore you should see a rising slope on the noise and the tones at equal amplitude.
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</blockquote>
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</blockquote>
 +
 
 +
=Position on the grid=
  
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The RTS provides detailed visual feedback of the audio spectrum.
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The RTA block requires an input signal only and doesn't transmit any signal, so its output doesn't need to be connected.
  
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One of its uses is detecting frequencies where undesired feedback occurs. You can then use a PEQ to cut those frequencies.
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=Use RTA to visualize the audio spectrum=
  
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<blockquote>“Use it to identify problem frequencies or as a spiffy screen saver.” [https://forum.fractalaudio.com/threads/correct-use-of-the-rta-block.141830/#post-1680183 source] </blockquote>
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The RTA visualizes the audio spectrum.
  
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The RTA can also be used to test the hardware I/O. For example, to test the Instrument input: ([http://forum.fractalaudio.com/threads/output-level.136991/page-3#post-1629752 source])
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To view the display, scroll to the RTA block and press Edit.
  
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# Go to a blank preset.
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It also makes for a great dynamic display during performances.
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# Create a chain that connects Input 1 to the RTA block. On a separate row create a chain where the Synth block feeds Output 3.
 
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# Set the Synth Type = Sine, Tracking = Off, Frequency = 1000 Hz.
 
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# Connect an instrument cable from Output 3 (left or right) to the Instrument Input.
 
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# Set the Input 1 / Instrument A/D Input Level (Home->Setup->I/O) to 50%.
 
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# Turn the Out 3 Level knob all the way up.
 
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# The Input 1 yellow LED should be lit. Red should not be lit. Go to the RTA block Config tab. Set Bands to 128, Window to Blackman. Go to the RTA tab. There should be a narrow spike at 1 kHz (three bands). There should be no other bands showing power except maybe a little noise at the highest bands. The spike at 1 kHz should be about 2 1/4 divisions below full-scale.
 
  
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=Connecting the RTA=
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[[image:rta.jpg|300px]]
  
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The RTA block requires an input signal and doesn't send a signal out, so its output doesn't need to be connected.
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=Use RTA to fight feedback=
  
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=How to view the RTA=
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The RTA can point out frequencies where undesired feedback occurs. Turn the Value knob to select the desired band, and the frequency of the selected band will be displayed in the upper left corner. You can then use a PEQ to cut frequencies.
  
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Scroll to the RTA block and press Edit to view the dynamic meters. It makes for a great display during performances.
+
<blockquote>'''FRACTAL AUDIO QUOTES'''<HR>
 +
<blockquote>
 +
[https://forum.fractalaudio.com/threads/correct-use-of-the-rta-block.141830/#post-1680183]
 +
Use it to identify problem frequencies or as a spiffy screen saver.
 +
</blockquote>
 +
</blockquote>
  
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To make the peaks remain longer visible, adjust Decay Time.
+
=Use RTA to test hardware I/O=
  
−
Turn the Value knob to select the desired band, and the frequency of the selected band will be displayed in the upper left corner.
+
The RTA can be used to test the hardware I/O. For example, to test the Instrument input:
  
−
[[image:rta.jpg|300px]]
+
<blockquote>'''FRACTAL AUDIO QUOTES''' [http://forum.fractalaudio.com/threads/output-level.136991/page-3#post-1629752]<HR>
 +
# Go to a blank preset.
 +
# Create a chain that connects Input 1 to the RTA block. On a separate row create a chain where the Synth block feeds Output 3.
 +
# Set the Synth Type = Sine, Tracking = Off, Frequency = 1000 Hz.
 +
# Connect an instrument cable from Output 3 (left or right) to the Instrument Input.
 +
# Set the Input 1 / Instrument Level in the I/O menu to 50%.
 +
# Turn the Out 3 Level knob all the way up.
 +
# The Input 1 yellow LED should be lit. Red should not be lit. Go to the RTA block Config tab. Set Bands to 128, Window to Blackman. Go to the RTA tab. There should be a narrow spike at 1 kHz (three bands). There should be no other bands showing power except maybe a little noise at the highest bands. The spike at 1 kHz should be about 2 1/4 divisions below full-scale.
 +
</blockquote>
  
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=Parameters table=
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=Use RTA to measure devices=
  
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{| class="wikitable"
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The RTA can be used to measure the output of other equipment, in conjunction with the [[Synth block]]. For example, to measure the frequency response of an external EQ or distortion pedal, set the Synth block to Pink Noise, send the Synth's signal through the pedal and back again, and use the RTA to measure and see the response.
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|-
 
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! '''Parameter'''
 
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! '''Axe-Fx III'''
 
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! '''Axe-Fx II'''
 
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! '''AX8, FX8'''
 
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|-
 
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| Decay Time
 
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! yes
 
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! n/a
 
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! n/a
 
−
|-
 
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| Input Select
 
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! yes
 
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! n/a
 
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! n/a
 
−
|-
 
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| Bands
 
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! yes
 
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! n/a
 
−
! n/a
 
−
|-
 
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| Window Type
 
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! yes
 
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! n/a
 
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! n/a
 
−
|}
 
  
 
[[category:Axe-Fx3]]
 
[[category:Axe-Fx3]]
 
[[category:Sounds]]
 
[[category:Sounds]]
 +
[[category:All]]

Latest revision as of 10:41, 9 November 2024

Realtime Analyzer block

Axe-Fx III: 1 block, no channels
FM3: n/a
FM9: n/a
VP4: n/a

Axe-Fx II: n/a
AX8: n/a
FX8: n/a

About the RTA

The RTA block is available on the Axe-Fx only.

FRACTAL AUDIO QUOTES

[1] The RTA is a Fourier Transform.

[2] The RTA block is a "constant Q" analyzer. White noise increases by 3dB/octave. The two tones are equal in amplitude. Therefore you should see a rising slope on the noise and the tones at equal amplitude.

Position on the grid

The RTA block requires an input signal only and doesn't transmit any signal, so its output doesn't need to be connected.

Use RTA to visualize the audio spectrum

The RTA visualizes the audio spectrum.

To view the display, scroll to the RTA block and press Edit.

It also makes for a great dynamic display during performances.

Rta.jpg

Use RTA to fight feedback

The RTA can point out frequencies where undesired feedback occurs. Turn the Value knob to select the desired band, and the frequency of the selected band will be displayed in the upper left corner. You can then use a PEQ to cut frequencies.

FRACTAL AUDIO QUOTES

[3] Use it to identify problem frequencies or as a spiffy screen saver.

Use RTA to test hardware I/O

The RTA can be used to test the hardware I/O. For example, to test the Instrument input:

FRACTAL AUDIO QUOTES [4]

  1. Go to a blank preset.
  2. Create a chain that connects Input 1 to the RTA block. On a separate row create a chain where the Synth block feeds Output 3.
  3. Set the Synth Type = Sine, Tracking = Off, Frequency = 1000 Hz.
  4. Connect an instrument cable from Output 3 (left or right) to the Instrument Input.
  5. Set the Input 1 / Instrument Level in the I/O menu to 50%.
  6. Turn the Out 3 Level knob all the way up.
  7. The Input 1 yellow LED should be lit. Red should not be lit. Go to the RTA block Config tab. Set Bands to 128, Window to Blackman. Go to the RTA tab. There should be a narrow spike at 1 kHz (three bands). There should be no other bands showing power except maybe a little noise at the highest bands. The spike at 1 kHz should be about 2 1/4 divisions below full-scale.

Use RTA to measure devices

The RTA can be used to measure the output of other equipment, in conjunction with the Synth block. For example, to measure the frequency response of an external EQ or distortion pedal, set the Synth block to Pink Noise, send the Synth's signal through the pedal and back again, and use the RTA to measure and see the response.

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