AudioDSP crunchy symmetrical Schetzen distortion effect based on the pedalSHIELD.
SuperCrunch.ino is a crunchy distortion effect from the pedalSHIELD examples. The pushbuttons control the volume of the output signal.
Core algorithm:
- distortion is derived on a symmetrical clipping system based on Schetzen formula
Schetzen Formula for symmetrical soft clipping is as follows:
{ 2*x for 0 <= |x| <= 1/3 }
f(x) = { (3-(2-3*x)^3)/3 for 1/3 <= |x| <= 2/3 }
{ 1 for 2/3 <= |x| <= 1 }
A vast improvement on the asymmetrical Crunch, and a much warmer fuzz than the simple clipping of Distortion.
Delivers quite a warm crunch with pretty good frequency response, although the upper registers of the guitar are a bit beyond the capability of the Arduino.
This example uses a private AudioDspDriver library that contains my refactoring of the core algorithms for driving the board. I may split this out as a stand-alone library at some point.
- see the main AudioDSP project
- Several Codes based on PedalSHIELD Library
- ..as mentioned on my blog