Rock'n Repair Shop - Just finished assembling and testing this Arduino 'Pedal Shield' for a client! This open source hardware project enables you to program your own guitar effects all using the
pedalSHIELD MEGA Arduino Guitar Pedal - YouTube
Build an Arduino Guitar Pedal Stompbox - Make:
Arduino DUE Guitar Pedal - Open Hardware. : 5 Steps (with Pictures) - Instructables
pedalSHIELD MEGA is a programmable guitar pedal for your Arduino | Arduino Blog