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Audio channel locations in a frame
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----------------------------------
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Not surprisingly the different MOTU interfaces place channels at different
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offsets within a frame. This section attempts to document what we know
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about the channel locations for various devices.
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Analog 1-8: 10, 13, 16, 19, 22, 25, 28, 31
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ADAT 1-4: 40, 43, 46, 49
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ADAT 5-8 (1x rates only): 52, 55, 58, 61
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Mix L-R (in, not at 4x): 10, 13
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Phones L-R (out, not at 4x): 10, 13
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Analog 1-8 (1x/2x rate): 16, 19, 22, 25, 28, 31, 34, 37
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Analog 1-8 (4x rate): 10, 13, 16, 19, 22, 25, 28, 31
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MainOut L-R (out, 1x/2x only): 40, 43
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Unknown 1-2 (in, 1x/2x only): 40, 43
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ADAT 1-4 (1x/2x only): 46, 49, 52, 55
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ADAT 5-8 (1x only): 58, 61, 64, 67
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AES/EBU 1-2 (1x with ADAT active): 70, 73
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AES/EBU 1-2 (2x with ADAT active): 58, 61
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AES/EBU 1-2 (1x/2x with ADAT off): 46, 49
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Phones L-R (out): 10, 13
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Analog 1-8: 16, 19, 22, 25, 28, 31, 34, 37
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Main L-R (out): 40, 43
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ADAT 1-4: 52, 55, 58, 61
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ADAT 5-8 (1x rates only): 64, 67, 70, 73
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Mix L-R (in, 1x/2x rates only): 10, 13
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Phones L-R (out, 1x/2x rates only): 10, 13
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Analog 1-8 (1x/2x rate): 16, 19, 22, 25, 28, 31, 34, 37
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Analog 1-8 (4x rate): 10, 13, 16, 19, 22, 25, 28, 31
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AES/EBU 1-2 (1x/2x rate): 40, 43
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SPDIF/Toslink 1-2 (1x/2x rate): 46, 49
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ADAT 1-4 (1x/2x rate): 52, 55, 58, 61
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ADAT 5-8 (1x rate): 64, 67, 70, 73
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Phones L-R (out): 10, 13
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Analog 1-2 (out): 16, 19
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Analog 3-8: 22, 25, 28, 31, 34, 37
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SPDIF 1-2 (in): 40, 43
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Main L-R (out): 40, 43
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SPDIF 1-2 (out): 46, 49
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Phones L-R (out): 10, 13
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Analog 1-8 (in): 16, 19, 22, 25, 28, 31, 34, 37
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Main L-R (out): 16, 19
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Padding (out): 22, 25
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ADAT 1-8 (in): 40, 43, 46, 49, 52, 55, 58, 61
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ADAT 1-8 (out): 22, 25, 28, 31, 34, 37, 40, 43
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Mic 1-2 (in, 1x/2x rates): 10, 13
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Phones L-R (out, 1x/2x rates): 10, 13
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Unknown 1-2 (out, 4x rates): 10, 13
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Analog 1-8: 16, 19, 22, 25, 28, 31, 34, 37
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Return 1-2 (in): 40, 43
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Main L-R (out): 40, 43
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SPDIF 1-2 (1x/2x rates): 46, 49
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Unknown (out, 4x rates): 46, 49
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Reverb 1-2 (in, 1x/2x rates): 52, 55
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[ Optical ports follow according to optical mode: first Optical-A
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channels, then optical-B channels. Out channels start at 52, in channels
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start at 58. At 1x rates 58/61 are "unknown" ahead of the optical
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channels, with inputs at 76/79 being unknown at 2x rates. ]
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Phones L-R (out): 10, 13
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Analog 1-2 (out): 16, 19
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Analog 3-8: 22, 25, 28, 31, 34, 37
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SPDIF 1-2 (in, 1x/2x rates): 40, 43
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Padding (out, 1x/2x rates): 40, 43
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SPDIF 1-2 (out, 1x/2x rates): 46, 49
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Ultralite Mk 3 hybrid:
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Phones L-R (out): 10, 13
307
Analog 1-2 (out): 16, 19
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Analog 3-8: 22, 25, 28, 31, 34, 37
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SPDIF 1-2 (in, 1x/2x rates): 40, 43
310
Main L-R (out): 40, 43
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Reverb 1-2 (in, 1x/2x rates): 46, 49
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SPDIF 1-2 (out, 1x/2x rates): 46, 49
313
Unknown 1-4 (in, 1x/2x rates): 52, 55, 58, 61
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Phones L-R (out): 10, 13
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Analog 1-8: 16, 19, 22, 25, 28, 31, 34, 37
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AES/EBU 1-2 (1x/2x rates): 40, 43
320
SPDIF 1-2 (1x/2x rates): 46, 49
321
Reverb 1-2 (in, 1x rates): 52, 55
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Unknown 1-2 (in, 1x rates): 58, 61
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[ Optical port channels follow in a similar was as for the 828 Mk 3.
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The precise locations are yet to be confirmed as of 14 Sept 2010. ]
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It appears that the traveler itself has no way to generate SMPTE timecode