But for my own, I prefer to use Arduino with up to 10 pedals input))) Just add for each additional pedal one more stereo Jack and wires.
If anybody think to try Wah Pedal, this solution can work))) Non serious.. but fun
Need iPhone, and paper.
Download free DIY paper template
Forgot to say, that if you already have guitar Volume pedal, also enough project on Arduino and Teensy to convert it into MIDI.
Or if you already have
- Volume Pedal
- Expression input hardware,