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DAC+DSP and toslink issue

Dori

September 27, 2021 15:21

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Hello I have a DAC+DSP that I am using on a RPi4 with CamillaDSP. Through the initial setup and troubleshooting, I took various steps, including loading a default profile and running the spdif2pi commands.

I now am able to use CamillaDSP to get audio out of toslink and output to a USB DAC. However, there is default routing from toslink in to toslink out, and if I try to output to toslink out through CamillaDSP I think I'm getting twice the output.

Does the DAC+DSP automatically route audio from toslink in to out, or did I do that at some point, and is there a way to disable it? I basically would like to just get toslink in, have CamillaDSP do the processing and then output to toslink out.

Thank you,

Dori

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6 comments

• 0
  
  Dori September 27, 2021 15:28

  I think (and hope) it's just a specific dsptoolkit write-mem command to turn on and off that passthrough...

  I did run these https://www.hifiberry.com/docs/software/using-the-dac-dsp-to-record-audio-from-s-pdif/

  Edited by Dori September 27, 2021 15:29
• 0
  
  HiFiBerry team September 27, 2021 15:49

  No, it's not just a simple write-mem command. If you want to handle SPDIF in and out independently, you have to create your own DSP program:
  https://github.com/hifiberry/hifiberry-dsp/blob/master/doc/adaptexistingprofiles.md

• 0
  
  Dori September 27, 2021 15:57

  HiFiBerry team is there a way to "unload" the dacdsp-default.xml that I loaded, or a way to reset the dac+dsp to the way it came with no profile?

  
  Thank you

   

   

• 0
  
  HiFiBerry team September 27, 2021 20:26

  There is never "no profile": Without a DSP profile, the DSP would just do nothing and there would be no audio at all.

• 0
  
  Dori September 27, 2021 20:35

  Ok, but my question is how do I get it to whatever profile it shipped with. Is there a reset? Or is there a "factory" profile I can load that will undo anything else?

  Thank you

• 0
  
  HiFiBerry team September 28, 2021 06:28

  That's the default profile:
  https://raw.githubusercontent.com/hifiberry/hifiberry-os/master/buildroot/package/hifiberry-test/dspdac.xml
  
  However, it still won't do what you are looking for. You need to create your own DSP program.