Originally posted by miden:
The difference between the G and the M is that the G cannot be used by sending it midi data it only uses the live audio data coming from a mic.
Midi ddata from a seq track only tells the unit the harmony pitches, it still has to have a live signal from your mic in real time to work. Using seq data frees up your chord hand, or arranger track, and allows more specific harmonies.
With any harmonizer, you still have to sing in real time into the unit.