Roland Sound Canvas SK-500 Owner's Manual page 118

About MIDI data
RPN LSB, MSB (control change numbers 100 & 101)
Data Entry (control change numbers 6 & 38)
Since the function of the RPN (Registered Parameter Number) is defined in the MIDI
specification, this message can be used between devices of different types. The RPN
MSB and LSB messages specify the parameter which is to be modified, and then Data
Entry messages can be used to modify the value of that parameter. RPN can be used
to adjust Pitch Bend Sensitivity, Master Coarse Tune, and Master Fine Tune.
NRPN LSB, MSB (control change numbers 98 & 99)
Data Entry (control change numbers 6 & 38)
NRPN (Non-registered Parameter Number) messages can be used to modify the val-
ues of sound parameters unique to a particular device. The NRPN MSB and LSB
messages specify the parameter that is to be modified, and then Data Entry messages
can be used to modify the value of that parameter.
Since the GS format defines the function of several NRPN messages, GS compatible
application programs can use NRPN messages to modify sound data parameters for
Vibrato, Cutoff Frequency, Resonance, and Envelope values.
Aftertouch (Channel Pressure only
Aftertouch is a message which conveys the pressure applied to the keyboard after
playing a note, so that this information can be used to control various aspects of the
sound.
There are two types of aftertouch message: Polyphonic Key Pressure, which is trans-
mitted separately for each note: and Channel Key Pressure, which is transmitted as
one value that affects all notes on the specified MIDI channel.
All Sounds Off
This message completely turns off the sound of all currently sounding notes. The
sound of the specified channel will be forcibly turned off.
All Notes Off
This message causes a Note Off to be sent to each note of the specified channel that
is currently on. However, if Hold 1 or Sostenuto are on, the sound will continue until
these are turned off.
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The values modified using
RPN messages will not be
initialized even if Program
Change messages, etc. are
received to select other
sounds.
After a GS Reset message is
received, NRPN messages
will be received.
For details about how to
use NRPN with GS sound
modules, refer to Using
NRPNs with GS Sound
Modules (The PDF file on
the SK-500 CD-ROM).
With the initial settings,
Aftertouch messages will
have no effect when
received by the SK-500. In
order for Aftertouch
messages to do something,
you need to set Aftertouch-
related parameters.