pedalbuilder
Inspired
Thanks to the deep editing capabilities of the Axe-Fx III and FM3, we can not only change the settings of the existing models, but we can also replicate other effects that have not been modeled. As @iaresee noted, there used to be a mother-of-all-effects emulation thread for the Axe-Fx II that people would post block SysEx files to along with descriptions. Let’s resurrect that for the III and FM3.
Thread rules:
The Fractal model of the Analogman King of Tone is a model of the King of Tone’s overdrive mode. The King of Tone has two other modes, clean boost and distortion, which are not modeled.
Using the advanced settings, I was able to replicate the other two modes. The King of Tone uses clipping diodes in an opamp feedback loop to create distortion, with each mode consisting of a different selection of clipping diodes. All three modes are symmetrical, i.e. use the same diode/number of diodes for the positive and negative side of the wave.
Here are the diodes for each mode:
For boost mode, we need an arrangement that produces no diode clipping. Although there is not a "no diode" option, there is a Blue LED option. Blue LEDs have a very high headroom (Vf ≈ 3.2), and require a very hot signal in order to start clipping. We can raise the headroom even higher by placing additional blue LEDs in series with the first one. One blue LED has a Vf of approximately 3.2 volts; increasing that to four blue LEDs will result in a Vf of approximately 12.8 volts, which is so high that it will not clip at all. This gives us our clean boost mode.
Thread rules:
- Don’t post presets, screenshots, or anything that is not a block. There are other places for sharing those.
- Unless absolutely necessary, please post single channel blocks.
- Please post a brief description of how you matched the effect. See below for an example.
The Fractal model of the Analogman King of Tone is a model of the King of Tone’s overdrive mode. The King of Tone has two other modes, clean boost and distortion, which are not modeled.
Using the advanced settings, I was able to replicate the other two modes. The King of Tone uses clipping diodes in an opamp feedback loop to create distortion, with each mode consisting of a different selection of clipping diodes. All three modes are symmetrical, i.e. use the same diode/number of diodes for the positive and negative side of the wave.
Here are the diodes for each mode:
- Overdrive: Two S1588 diodes
- Distortion: One MA856 diode
- Boost: No diodes
For boost mode, we need an arrangement that produces no diode clipping. Although there is not a "no diode" option, there is a Blue LED option. Blue LEDs have a very high headroom (Vf ≈ 3.2), and require a very hot signal in order to start clipping. We can raise the headroom even higher by placing additional blue LEDs in series with the first one. One blue LED has a Vf of approximately 3.2 volts; increasing that to four blue LEDs will result in a Vf of approximately 12.8 volts, which is so high that it will not clip at all. This gives us our clean boost mode.
Last edited:
