Ring mod mod doesn't replace Filter FM for example etc.eXode wrote: Which is negated both by the fact that the Prophet 6 doesn't have ring mod, and if you use OSC2 for crossmod (which the Prologue also does) you can't use the Filter EG to modulate the osc pitch independently (which the Prologue can!)
Also LP + HP opens new dimension in sound design in comparison with single lp.