Arduino MIDI Volume Pedal
This is the MIDI volume pedal project designed by Keith Neufeld.This synths also have an internal volume setting thatโ€™s controlled by software (like the volume control on an iPod, or a PC, or a higher-end car stereo). And this internal volume setting can be addressed by MIDI, since MIDI is digital commands sent serially over a cable. The circuit is very simple.MIDI connects devices using a current loop.
   Arduino MIDI Volume Pedal
at www.neufeld.newton.ks.us