Rodgers PR-300S Owner's Manual page 107

Hold 1 (Control Change 64)
Normally, this message allows you to sustain notes (much
the same as a sustain pedal on a piano). When a "Hold On"
message is received, all notes played will be sustained. When a
"Hold Off" message is received, all sustained notes will be
released.
A "Hold On" message has a value between 64 and 127; a
"Hold Off' message has a value between 0 and 63.
Sostenuto (Control Change 66)
Normally, this message allows you to sustain notes like the
sostenuto pedal of a piano (notes played when the "Sostenuto
On" message is received will be sustained; notes played after the
"Sostenuto On" message is received will not be sustained). A
"Sostenuto Orf' message will release all notes sustained by the
sostenuto function.
A "Sostenuto On" message has a value between 64 and 127;
a "Sostenuto Off' message has a value between 0 and 63.
Effect 1 • Reverb Amount (Control Change 91)
This message allows you to change the amount of reverb for
a
specific Part.
Effect 2· Chorus Amount (Control Change 93)
This message allows you to change the amount of chorus for
a specific ParI.
NRPN and RPN Messages
There are other parameters of the GS Sound Source which
can be changed using Control Change messages. Please refer to
the PR-300S MIDI Implementation for more information.
System Exclusive (SysEx) Messages
System Exclusive Messages allow certain parameters of
your PR-300S to
be changed for specific uses. Please refer to the
PR-300S MIDI Implementation for more information. The GS
Format Sound Source of the PR-300S will respond to all GS
Format SysEx messages.
99