• Registered: 2026-07-27
  • Posts: 5

Topic: fireface ucx ii: how to bypass totalmix and output bit-accurate audio

i can select the proper spdif and aes outputs in my playback software and output through the correct outputs, but the levels in totalmix are not correct. how do i bypass the mixer entirely and just output the unadulterated digital signal?

  • ramses
  • ramses
  • DAW Mastermind
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  • From: UTC+1
  • Registered: 2012-10-14
  • Posts: 15,800

Re: fireface ucx ii: how to bypass totalmix and output bit-accurate audio

TotalMix FX doesn't alter digtial audio. Its kind of "lossless".

BR Ramses - HDSPe MADI FX, M-1620 Pro D, 12Mic, UFX III, ADI-2 Pro FS R BE, Nuendo 15, Win10 IoT Ent
  • From: Germany
  • Registered: 2007-04-10
  • Posts: 11,095

Re: fireface ucx ii: how to bypass totalmix and output bit-accurate audio

There is no way to bypass the mixer, but at default settings and unity gain, nothing is changed at all.

Regards
Daniel Fuchs
RME

RME Support's Website

4 Reply by jerryfreak (edited by jerryfreak 2026-07-27 14:06:26)

  • Registered: 2026-07-27
  • Posts: 5

Re: fireface ucx ii: how to bypass totalmix and output bit-accurate audio

strange, i was able to get AES to work correctly when i split it to L and R mono... when i left it as stereo it was dual mono output at 3 dB lower. SPDIF works fine in stereo mode

  • ramses
  • ramses
  • DAW Mastermind
  • Offline
  • From: UTC+1
  • Registered: 2012-10-14
  • Posts: 15,800

Re: fireface ucx ii: how to bypass totalmix and output bit-accurate audio

AES is a 2-ch protocol. Stereo playback is possible/default.
Please send a screenshot of TotalMix FX with the AES output selected and driver settings dialog.

BR Ramses - HDSPe MADI FX, M-1620 Pro D, 12Mic, UFX III, ADI-2 Pro FS R BE, Nuendo 15, Win10 IoT Ent