152
Appendices
Reset All Controllers ✩
This message returns controller values to their initial settings. The following control-
ler values for the specified channel will be reset to their initial values.
Controller Initial value
Pitch Bend 0 (center)
Polyphonic Key Pressure 0 (minimum)
Channel Pressure 0 (minimum)
Modulation 0 (minimum)
Expression 127 (maximum)
Hold 0 (off)
Portamento 0 (off)
Soft 0 (off)
Sostenuto 0 (off)
RPN number unset
NRPN number unset
Active Sensing
This message is used to check for broken MIDI connections, such as MIDI connectors
that have been pulled out, or MIDI cables that have been broken. The SC-8850 trans-
mits Active Sensing messages from MIDI OUT at specific intervals. Once an Active
Sensing message is received at MIDI IN, Active Sensing monitoring will begin, and
if an Active Sensing message fails to arrive for more than 420 [msec], it is assumed
that the cable has been disconnected. If this happens, all currently sounding notes
will be turned off, the same procedure will be executed as if a Reset All Controllers
message was received, and Active Sensing monitoring will stop.
System Exclusive messages
Exclusive messages are used to control functions which are unique to specific devic-
es. Although Universal System Exclusive messages can be used even between devic-
es of different manufacturers, most Exclusive messages cannot be used between
devices of different types or different manufacturers.
In order to recognize the device for which the data is intended, Roland Exclusive
messages contain a manufacturer ID, device ID and model ID.
The SC-8850 manufacturer’s ID is 41H. The device ID is 10H. The model ID is 42H.
GM1 System On ✩
(Universal System Exclusive)
When GM1 System On is received, the SC-8850 will be set to the basic General MIDI
1 settings. Also, NRPN Bank Select messages will no longer be received after GM1
System On is received. The beginning of song data bearing the GM logo contains a
GM1 System On message. This means that if you play back the data from the begin-
ning, the sound generator device will be automatically initialized to the basic set-
tings.
GM2 System On
(Universal System Exclusive)
When GM2 System On is received, the SC-8850 will be set to the basic General MIDI
2 settings. Refer to p.146.
Parameter values that were
modified using RPN or
NRPN will not change
even when a Reset All
Controller message is
received.
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