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MIDI System Exclusive Message Formats
In the explanations, below, braces < > are used to represent enclosed MIDI
data bytes. Concatenated data is shown by < > < >. Names are also enclosed
in braces as symbolic representations defined further into the explanation.
Values are decimal unless an H is used to denote Hexadecimal values.
For example, the MIDI bytes to select song mode for DEVICE NUMBER 3 are:
F0H, 0, 1, 26H, 3, 1, F7H.
<sys ex message> = <F0H> <manufacturer> <device num>
<message bytes> <F7H>
<manufacturer> = <0 1 26H>
<device num> = one byte in range 0 to 15. Must match
SYSEX DEVICE NUMBER set in the ATR-1a.
<message bytes> = <0> to select program mode.
or <1> to select song mode.
or <2> bypass on
or <3> bypass off
or <4><14><system data>
or <5><31><program data>
or <6><34><song data>
<system data> =
<midi channel> 1 to 16, 0 = OMNI
<midi sustain> controller 0 = off, 1 = on
<program change> controller 0 = off, 1 = on
<midi note> controller 0 = off, 1 = on
<pitch bend> controller 0 = off, 1 = on
<mod wheel> controller 0 = off, 1 = on
<foot switch> 0 = BYPASS, 1 = STEP
<speed controller #> 14 to 31, 13 = OFF
<vibrato rate controller #> 14 to 31, 13 = OFF
<vibrato delay controller #> 14 to 31, 13 = OFF
<step controller #96> 0 = off, 1 = on
<sensitivity> 1 to 25
<detune> 0 to 100
<detune direction> 0 = make sharp, 1 = make flat
<program data> =
<program number> 1 to 50
<speed> 0 to 25
<scale 1>…<scale 12> for C, C#,…: 0=remove, 1 =tune, 2=bypass.
<vibrato type> 0 = off, 1 = SINE, 2 = SQUARE, 3 = SAW
<vibrato depth> 0 to 100 cents
<vibrato rate> 1 to 97 (.1 to 9.7 sec)