Amp modeling release notes - Revision history

Yek: /* Firmware Cygnus 32.xx */

2026-03-06T15:37:07Z

Firmware Cygnus 32.xx

2026-02-20T21:35:50Z

Firmware Cygnus 32.xx

2026-02-20T13:29:23Z

2026-02-18T13:00:34Z

Firmware Cygnus 31.xx

2026-02-18T13:00:13Z

Firmware Cygnus 31.xx

2026-02-18T12:58:52Z

Firmware Cygnus 31.xx

2026-01-28T01:33:37Z

Firmware Cygnus 31.xx

2026-01-27T23:55:37Z

Firmware Cygnus 31.xx

2025-12-27T19:16:27Z

2025-12-27T18:24:15Z

← Older revision		Revision as of 15:37, 6 March 2026
Line 12:		Line 12:

	==Firmware Cygnus 32.xx==		==Firmware Cygnus 32.xx==
		+
		+	Improved Amp block preamp modeling.

	Improved power tube grid modeling in Amp block.		Improved power tube grid modeling in Amp block.

@@ Line 17: / Line 17: @@
 Improved frequency response accuracy for amp models.
-Changed behavior of PI Bias Excursion control in Amp block. In addition to varying the amount of phase inverter bias excursion, the control now also inversely controls the amount of distortion generated by the phase inverter. This can be used to reduce (or increase) the amount of distortion generated by the phase inverter. Note that many classic amps (e.g. the Deluxe Reverb) generate significant phase inverter distortion. This distortion is typically fuzzy and quite asymmetric leading to significant amounts of intermodulation distortion.
+Added “Transistor” Power Tube Type. This is now the default type for the Jazz 120 amp model and models a transistor output stage. Existing presets using this model are automatically updated.
 ==Firmware Cygnus 31.xx==

← Older revision		Revision as of 13:00, 18 February 2026
Line 10:		Line 10:

	=Cygnus X-3=		=Cygnus X-3=
		+
		+	==Firmware Cygnus 32.xx==
		+
		+	Improved power tube grid modeling in Amp block.
		+
		+	Improved frequency response accuracy for amp models.
		+
		+	Changed behavior of PI Bias Excursion control in Amp block. In addition to varying the amount of phase inverter bias excursion, the control now also inversely controls the amount of distortion generated by the phase inverter. This can be used to reduce (or increase) the amount of distortion generated by the phase inverter. Note that many classic amps (e.g. the Deluxe Reverb) generate significant phase inverter distortion. This distortion is typically fuzzy and quite asymmetric leading to significant amounts of intermodulation distortion.

	==Firmware Cygnus 31.xx==		==Firmware Cygnus 31.xx==

← Older revision		Revision as of 13:00, 18 February 2026
Line 22:		Line 22:

	Improved power amp modeling in Amp. This yields a more controlled low end, especially for non-MV amps.		Improved power amp modeling in Amp. This yields a more controlled low end, especially for non-MV amps.
−
−	~~Improved power tube grid modeling in Amp block.~~
−
−	~~Improved frequency response accuracy for amp models.~~
−
−	Changed behavior of PI Bias Excursion control in Amp block. In addition to varying the amount of phase inverter bias excursion, the control now also inversely controls the amount of distortion generated by the phase inverter. This can be used to reduce (or increase) the amount of distortion generated by the phase inverter. Note that many classic amps (e.g. the Deluxe Reverb) generate significant phase inverter distortion. This distortion is typically fuzzy and quite asymmetric leading to significant amounts of intermodulation distortion.

	<blockquote>		<blockquote>

← Older revision		Revision as of 12:58, 18 February 2026
Line 24:		Line 24:

	Improved power tube grid modeling in Amp block.		Improved power tube grid modeling in Amp block.
		+
		+	Improved frequency response accuracy for amp models.
		+
		+	Changed behavior of PI Bias Excursion control in Amp block. In addition to varying the amount of phase inverter bias excursion, the control now also inversely controls the amount of distortion generated by the phase inverter. This can be used to reduce (or increase) the amount of distortion generated by the phase inverter. Note that many classic amps (e.g. the Deluxe Reverb) generate significant phase inverter distortion. This distortion is typically fuzzy and quite asymmetric leading to significant amounts of intermodulation distortion.

	<blockquote>		<blockquote>

← Older revision	Revision as of 13:29, 20 February 2026
(No difference)

@@ Line 31: / Line 31: @@
 [https://forum.fractalaudio.com/threads/axe-fx-iii-firmware-31-01-beta-2.217357/page-2#post-2735933]
 The ONLY thing that matters to me is how the models compare to the real amps. All the amps benefit from the new algorithms. And the models compare better than ever to the real amps. The new algorithms add considerable "punch". I won't go into details about what I discovered but was doing some tests and noticed something that the amp was doing that the model wasn't. After some investigation I discovered the reason and reworked the algorithms to model it. The so-called "Class-A" amps (AC-30, Tiny Terror, etc.) also greatly benefit from the new algorithm. Amps with cathodyne PIs (Deluxe, Princeton, etc.). are also much improved.
 </blockquote>
 </blockquote>

← Older revision		Revision as of 23:55, 27 January 2026
Line 22:		Line 22:

	Improved power amp modeling in Amp. This yields a more controlled low end, especially for non-MV amps.		Improved power amp modeling in Amp. This yields a more controlled low end, especially for non-MV amps.
		+
		+	Improved power tube grid modeling in Amp block.

	<blockquote>		<blockquote>

@@ Line 7: / Line 7: @@
 *  <q>[[Amp block]]</q>
 * <q>[[Amp_block#White-box_modeling|White-box modeling]]</q>
-* <q>[[Amplifier models list]]</q>
+* <q>[[Amp models list]]</q>
 =Cygnus X-3=

← Older revision	Revision as of 18:24, 27 December 2025
(No difference)