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Appendix C: Additional RPN Messages 35
appendix c
Additional RPN Messages
You may have noticed that although we have stated there are 128 MIDI controller messages (0 – 127),
Appendix B shows 132. This is because messages 128 – 131 are a different type of MIDI message, de-
fined in the MIDI Specification as RPN messages. We have created four messages that are sent like
MIDI CC's, but actually transmit a series of RPN messages. This makes sending these complex multi-
part messages as easy as sending a MIDI CC message. You can assign these to the controls on your
KeyStudio keyboard in exactly the same way as any other MIDI controller message.
The following table lists the RPN messages and what they are used for:
Controller Number MIDI Message Use
128 Pitch Bend Sensitivity Alters the range of a pitch bend message
129 Master Tune (coarse) Adjusts instrument tuning in large steps
130 Master Tune (fine) Adjusts instrument tuning in small steps
131 Monophonic Aftertouch Adds vibrato to an instrument preset
Monophonic aftertouch is not an RPN message. However, it is an additional effect message defined in
the General MIDI specification and this is why we have included it in Appendix C.