System Real-Time Messages
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11111000 Timing Clock.
Sent 24 times per quarter note when
synchronization is required (see text).

11111001 Undefined. (Reserved)

11111010 Start.
Start the current sequence playing.
(This message will be followed with
Timing Clocks).

11111011 Continue.
Continue at the point the sequence was
Stopped.

11111100 Stop.
Stop the current sequence.

11111101 Undefined. (Reserved)

11111110 Active Sensing.
Use of this message is optional. When
initially sent, the receiver will expect
to receive another Active Sensing message
each 300ms (max), or it will be assume
that the connection has been terminated.
At termination, the receiver will turn off
all voices and return to normal (non-
active sensing) operation.

11111111 Reset.
Reset all receivers in the system to
power-up status. This should be used
sparingly, preferably under manual
control. In particular, it should not
be sent on power-up.