Trigger
<Trigger> determines the envelope trigger mode.
Mul - Triggers are accepted at all times.
SnG - Triggers are accepted only when the envelopes have run
their course or when they are in the release phase.
MIDI Control
This global parameter determines the type of MIDI messages that
are sent.
OFF - Program Change, Note On/Off for audio/manual triggers
and System Exclusive data are sent.
Ctr - Additionally, Controllers are sent when program parameters
are changed (refer to Chapter 9).
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