Quantity   Component name
1 × Raspberry Pi To process audio
1 × Wah Pedal To remove internal circuitry and replace with the Pro Micro
1 × AudioInjector Soundcard ADC / DAC conversion. Replaces the USB interface required previously
5 × Footswitches
1 × bundle of wires for connecting it all together
2 × Neutrik Jack/XLR combi input sockets For audio input into the Soundcard
3 × 1/4" Jack Sockets For audio output from Soundcard and headphone
1 × Arduino Pro Micro Brains of Additional expression pedal input. Turns it into a USB MIDI pedal