DX7

...a Waldorf and a Prophet VS. The FM is closest to something like a Synclavier or Yamaha’s pre DX7 prototypes, with it’s fairly Freeform routing, rather than pre-set algorithms like most FM synths. The mutants are a fairly unique implementation of phase synchronous effects, meaning you can have a wet/dry mix on things that don’t...

It was still 6-operator, like the DX7, but had 32-voices instead of 16 like the DX7. You could also do a layer or split like you mentioned, with two patches each have 16-voices. Basically like playing two DX7s with 1 keyboard.

...I mute the vocal track. It separated out vocal, backing vocal, drums, bass, percussion, synth, and other (which was DX7 plucky sound). I also looked at the song editor, seems pretty smart. I didn't go so far as to play with rearranging my songs (I like them how they are), just checked out the interface....