Modulation Controller CC# 1 – Percussion Roll Volume (for actual recorded rolls):
The modulation control for the percussion instruments that use it works in a similar manner as the sustained instruments. There are four percussion instruments in GPO that use the mod wheel for rolled crescendos/decresendos when the proper note is played. These are the cymbals, snare drum, and bass drum. The wind machine also uses mod wheel control of volume. The more mod wheel data applied to these instruments the louder the ‘roll’.
Controller CC# 64 – Dampening:
In most other instruments in GPO this controller is used either for legato or note sustaining. Percussive instruments use the sustain pedal for standard sustain while in “Pedal mode 2.” The vibraphone adds a second instrument choice that can function in standard “Pedal mode 1,” at the expense of keyswitching.