❍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.

❍Reset All Controllers ✩

This message returns controller values to their initial settings. The following controller 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

*Parameter values that were modified using RPN or NRPN will not change even when a Reset All Controller message is received.

❍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 bro- ken. This unit transmits 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 discon- nected. 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 devices. Although Universal System Exclusive messages can be used even between devices of different manufacturers, most exclusive messages cannot be used between devices of different types or different manufactur- ers.

In order to recognize the device for which the data is intended, Roland exclusive messages contain a manufacturer ID, device ID and model ID.

This unit exclusive messages use two model IDs; 42H for GS format, and 45H for SC-55 (88). The two numbers are used depending on the parameter you wish to modify. Be aware that if the appropriate ID number is not used, data will not be transferred. (p.134)

GM System On ✩ (Universal System Exclusive)

When GM System On is received, the unit will be set to the basic GM settings. Also, NRPN Bank Select messages will no longer be received after GM System On is received. The beginning of song data bearing the GM logo contains a GM System On message. This means that if you playback the data from the beginning, the sound generator device will be automatically initialized to the basic settings.

GS Reset (GS Format System Exclusive)

When GS Reset is received, the unit will be set to the basic GS settings. Also, NRPN messages specified in the GS format can be received after GS Reset is received. The beginning of song data bearing the GS logo contains a GS System Reset mes- sage. This means that if you playback the data from the beginning, the sound generator device will be automatically initialized to the basic settings.

Master Volume (Universal System Exclusive)

This is an exclusive message common to all MIDI devices that controls the master volume of all Parts.

Other exclusive messages

This unit can receive GS format exclusive messages (model ID 42H) that are common to all GS sound generators. This unit can also use exclusive messages (model ID 45H) that are especially for the SC-55 (88). Exclusive messages can be used to store this unit settings or to make fine adjustments to parameters.

For details of the exclusive message transmitted and received by this unit, refer to the explanation on p.191 and following.

Chapter 7. MIDI and the unit

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