Alcorn Mcbride 8 TraXX, User Manual

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MIDI Control
The 8TraXX may also be controlled using MIDI control change messages via the 5-
pin DIN Connector. The data format is:
31250 Baud, N o Parity, 8 bits, 1 Stop bit
Unlike with parallel
control, MIDI and
RS232 control allow
you to play any sound to
any channel.
The protocol is in accordance with MIDI Control Change protocol. As shown in
the following table, the Status Byte (`76) is always followed by two data bytes that
determine the channel to be addressed and the activity to be triggered (i.e. Play,
Stop, Mute, etc.) All number in the table are decimal.
Message Format: (Status Byte)(Control Number)(Control Value)
Function Status Byte
(control change)
Control Number
Range
Control Value Range
Play Channel 176 64 – 71 select
channels 1 - 8
1 – 122 selects sound
number 1 - 122
Play & Loop
Channel
176 72 – 79 select
channels 1 – 8
1 – 122 selects sound
number 1 - 122
Stop Channel 176 80 – 87 select
channels 1 – 8
0
Mute /Unmute
Channel
176 88 – 95 select
channels 1 – 8
0 = Mute channel
127 = Unmute channel
Disable/Enable
Front Button
176 122 0 = Disable buttons
127 = Enable buttons
Stop All
Channels
176 123 0
Examples:
Play sound 1 to channel 2 176,73,0
Play and loop sound 4 to channel 5 176,76,3
Stop channel 4 176,83,0
Unmute channel 6 176,93,127
Stop all channels 176,123,0
August 8, 2006 • Alcorn McBride 8TraXX User’s Manual • Rev 1.8 • Page 15