How to read simultaneously from two ALSA devices

HARK FORUM › How to read simultaneously from two ALSA devices

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  • April 13, 2018 at 5:12 pm #523
    GABRIEL MUSAT MESTRE
    Participant

      I need to use the semiblindICA node for AEC. The input is a simple capture ALSA device (hw:0,0), and the reference is a virtual mic with the speakerś sound redirected to it (hw:1,0).
      for that i use one AudioStreamFromMic node for hw:0,0 and another one for hw:1,0, but it only reads one of the PCM from the two AudioStreamFromMic nodes.
      It should read hw:0,0 from the first one and hw:1,0 from the last one, but it reads hw:0,0 from both even though the device parameter is set correctly on both nodes.
      How can i solve that?
      Is there an alternative for capturing audio from ALSA devices?

      April 16, 2018 at 2:31 pm #525
      mfukuda
      Moderator

        Hello,

        HARK does not support using multiple audio devices at the same time.
        You should use one multi-channel audio device and one channel of the device should be reference signal for SemiBlindICA.
        To support multiple audio devices is future work.

        Best,
        HARK Support team

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