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18
User’s Guide M-32 AD
© RME
9. Remote Control
9.1 MIDI
The M-32 AD can be completely remote controlled via MIDI. It reacts on special SysEx com-
mands. Furthermore, upon request it will report the complete device status, including all con-
trols and LEDs on the front plate. Each M-32 AD can be programmed with its own ID, providing
a separated remote control of multiple devices via a single MIDI channel. A description of the
MIDI implementation is found in chapter 19.
The key REMOTE is used to select the source of the MIDI remote control commands: MIDI
port, MADI port and Off. The latter is a safety function to prevent any setup-change by any MIDI
signal.
The diagram shows the signal flow
of the MIDI data with all I/Os. The
MIDI input signal reaches both the
internal Remote Command
Processor and the MIDI outputs.
This
MIDI Through function
provides the base for a simplified
serial MIDI cabling when using
multiple M-32 ADs. The same is
true for remote control via MADI,
where MIDI is passed through from
device to device automatically via
the serial MADI cabling.
9.2 MIDI over MADI
MADI allows for a transmission of 64 audio channels over long distances with a single line –
perfect. So what about MIDI? Be it remote control commands or sequencer data, in practice
only a single MADI line will not suffice. Therefore RME developed a
MIDI over MADI technol-
ogy. The data at the MIDI input are being included into the MADI signal invisibly, and can be
collected at the MIDI output of another M-series converter, ADI-8 QS, ADI-6432, ADI-642, ADI-
648, Micstasy or a HDSP MADI, at the other end of the MADI line.
Technically every single MADI channel includes several additional bits containing various infor-
mation (Channel Status). RME uses the usually unused
User bit of channel 56 (channel 28 in
96k frame mode) to transmit MIDI data invisibly within MADI, ensuring full compatibility.
Unlike other MADI-based devices from RME, the M-32 AD is no bi-directional MIDI to MADI
converter for external signals, because only one direction is available for the transmission.