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USB Microphone input from Raspberry in Sigma Studio

Christian Führer

January 05, 2022 20:49

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Hi there, can someone please give me a hint if and how i can use the usb microphone, i successfully use for room correction with hifiberry OS, also as input in Sigma Studio? I want to use sound signals from the microphone to modify them with delay and wqualizers and then send it to the output. I am pretty new to Sigma Studio, so apologize me please if the information is already given here.

Thanks a lot!

BTW: i have the DAC + DSP and use it for room correction, it is working very good. Playing around with Sigma Studio and the DSP is so much fun.

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4 comments

• 0
  
  Christian Führer January 06, 2022 22:58

  lsusb provides me this:

  # lsusb
  Bus 002 Device 001: ID 1d6b:0003 Linux 5.10.42-v7l xhci-hcd xHCI Host Controller
  Bus 001 Device 003: ID 0d8c:0134 Usb Microphone Usb Microphone
  Bus 001 Device 002: ID 2109:3431 USB2.0 Hub
  Bus 001 Device 001: ID 1d6b:0002 Linux 5.10.42-v7l xhci-hcd xHCI Host Controller
  #
  now i think i only need the lines for asound.conf to make sure that the microphone will be "connected" to asrcin1 0,1 in sigma studio, correct?

• 0
  
  HiFiBerry team January 07, 2022 08:18

  You can't "connect" this in SigmaStudio. An USB sound card is a completely separate device that's not visible to the DSP at all.

• 0
  
  Christian Führer January 07, 2022 10:20

  Ok, thanks. Any idea how i can bring signals from a microphone to the DSP? What i want to do: I want to aquire acoustig signals via the micro, filter it and bring it to a subwoofer. And the missing piece is the micro-to-DSP thing :-). (Or is there any other hifiberry product which could work here?)

• 0
  
  HiFiBerry team January 07, 2022 10:50

  You can use a tool like "alsaloop" to send the audio from one sound card (your USB mic) to another (the DAC+ DSP). However, you might need to experiment with the parameters as you will need some resampling.
  Check the manual page and experiment a bit with it.