Roland Audio Canvas UA-100 User Manual page 59

Using MIDI Messages to Control the UA-100
Playback
Rewind to the beginning of the song, and listen to the sequence data. Notice that the
volume will change for the UA-100 level that corresponds to the MIDI channel you
used in "Input MIDI Messages" (p. 59).
Many other MIDI messages can be used to control the settings of the UA-100. For
details refer to the Reference Manual and the MIDI Implementation.
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