Axe-Fx III Firmware Release Version 13.01

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Axe-Fx III Firmware Release Notes


13.01

Fixed global Input Gain loading wrong value.

Changed global Input Gain and Amp block Input Trim to read in linear units due to confusion over the meaning of dB.



13.00

Improved Drive block modeling. New algorithm uses a novel solution to solve the nonlinear ODE of a diode clipper with memory (i.e. a capacitor). The accuracy of the diode I-V curve is also greatly improved. This new algorithm has the accuracy of implicit iterative solutions with speed rivaling explicit solutions. CPU usage is only slightly increased vs. the previous algorithm. Note that many of the Drive models will now behave differently and presets should be auditioned. The behavior of the tone controls in some models has also changed. Of note are the Timmy models where the tone controls are now faithful to the actual pedal and decrease bass/treble when turned clockwise.

The Drive block now features a “Bass Response” control for types based on the Rat, Tube Screamer and various derivates. In some models this is duplicated on the Basic page as it is the Bass/Voice/etc. control (and renamed accordingly). This function was previously provided by the Low Cut control. The Low Cut control is now a separate control that allows adjusting the input highpass frequency. Existing presets will automatically be updated with the new default value for the Low Cut control.

Added Bias control to GUI of all Drive block models.

Added “Headroom” monitoring meter to Amp block. The most common reason for “muddy” tones with high-gain amps is incorrect setting of the Master Volume control. The Headroom meter displays the voltage at the virtual power tubes in dB. If the Master Volume is too high the meter will be near 0 dB most of the time. Note that this only applies to amps where the power amp is intended to run “clean” like the 6160, Recto, etc. Non-Master Volume amps get their distortion from the power amp distorting so this recommendation does not apply.

Added Global EQ to all outputs. Note that the EQ for Outputs 3 and 4 is not active if that output has Copy Input 1 set and the corresponding Output block is not in the patch.

Added selectable Graphic/Parametric EQ for Global Output EQs.
 
Heads up, if you changed the Input 1 Gain setting in the Global Settings you might want to check it. I had corrected mine in the 13.0 firmware and it was at 2.xx after the update. Centered is 1.00 which I presume is the default Input Gain.
 
@Dave Merrill " Did the drives in the amp block get updated in this release? Shimmer specifically? "

The improvements are to the modelling of the diode clipping, so they'd affect any diode based drive.

The drives in the amp block are usually just clean boosts (drive at 0) so they probably didn't do any diode clipping in the first place, so shouldn't see a difference with this update.
 
Heads up, if you changed the Input 1 Gain setting in the Global Settings you might want to check it. I had corrected mine in the 13.0 firmware and it was at 2.xx after the update. Centered is 1.00 which I presume is the default Input Gain.
If you have a pre-13.00 backup and changed a bunch of settings you now need to change back, you could always revert all changes in one swell foop by restoring yer backup.... ;)
 
The headroom parameter is a really nice addition to the amp block - here's a quick little video demonstrating the effect MV has on the Recto 1 Orange Modern, with the headroom parameter providing visual feedback. Clips were normalised in post and the video is "unlisted" on YT so you'll need to access it from here.



Also, try an amp like the Atomica or BE set to a light crunch and boost it with the Compulsion Distortion (level 10, drive around 3, tone to taste) - it'll take you from a great rock rhythm tone to a fat, searing lead. Glorious!

Edit - Preset attached
 

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The headroom parameter is a really nice addition to the amp block - here's a quick little video demonstrating the effect MV has on the Recto 1 Orange Modern, with the headroom parameter providing visual feedback. Clips were normalised in post and the video is "unlisted" on YT so you'll need to access it from here.


First pass was the sweet spot for me.

2nd had a midrange thing I didn't like, and the 3rd was just squashed....
 
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