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Examples for sending MIDI strings:
- Set input 1 to 0 dB: B0 66 68
- Set input 5 to maximum attenuation: B1 6A 0
- Set playback 1 to maximum: B4 66 7F
- Set Output 3 to 0 dB: B8 68 68
Note: Sending MIDI strings requires the use of programmer's logic for the MIDI channel, starting
with 0 for channel 1 and ending with 15 for channel 16.
Further functions:
- Trim Gains On: BC 66 xx (BC = MIDI channel 13, xx = any value)
- Trim Gains Off: BC 66 xx or select a submix
Select submix (fader) in third row:
- channel 1/2: BC 68/69 xx
- channel 3/4: BC 6A/6B xx
etc.
23.6 Loopback Detection
The Mackie Control protocol requires feedback of the received commands, back to the hard-
ware controller. So usually TotalMix will be set up with both a MIDI input and MIDI output. Unfor-
tunately any small error in wiring and setup will cause a MIDI feedback loop here, which then
completely blocks the computer (the CPU).
To prevent the computer from freezing, TotalMix sends a special MIDI note every 0.5 seconds to
its MIDI output. As soon as it detects this special note at the input, the MIDI functionality is disa-
bled. After fixing the loopback, check Enable MIDI Control under Options to reactivate the To-
talMix MIDI.
23.7 OSC (Open Sound Control)
Besides simple MIDI notes, the Mackie Protocol and Control Change commands, TotalMix FX
can also be controlled by the Open Sound Control, OSC. For details on setup and usage see
chapter 20.7.3.
An OSC implementation chart can be downloaded from the RME website:
http://www.rme-audio.de/downloads/osc_table_totalmix_new.zip
RME offers an iPad template for the iOS app TouchOSC (by Hexler, available in the Apple App-
Store):
http://www.rme-audio.de/downloads/tosc_tm_ipad_template.zip
The RME forum hosts further information, templates (iPhone...) and useful user feedback.
User's Guide HDSPe MADI © RME
67
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