MIDI doesn't pass audio streams at all. It's purely a message-passing protocol. Per the Wiki article: MIDI's primary functions include communicating event me

MIDI doesn't pass audio streams at all. It's purely a message-passing protocol. Per the Wiki article: MIDI's primary functions include communicating event messages about musical notation, pitch, velocity, control signals for parameters (such as volume, vibrato, panning, cues, and clock signals (to set the tempo)) between two devices in order to complete a signal chain and produce audible sound from a sound source. http://en.wikipedia.org/wiki/MIDI http://en.wikipedia.org/wiki/MIDI