Audio Sink

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Allows a signal to be played through your speakers or other audio device

Parameters

  1. Sample Rate: Audio sampling rate used, click the drop-down menu to see popular rates. Note, not all sampling rates will be supported by your hardware. For typical applications, this should be set to 48kHz.
  2. Device Name: Leave the device name blank to choose default audio device. ALSA users with audio trouble may try setting the device name to plughw:0,0
  3. OK to Block:
  4. Num Inputs: The audio sink can have multiple inputs depending upon your hardware. For example, set the inputs to 2 for stereo audio, or 1 for mono.

For issues or debugging see https://wiki.gnuradio.org/index.php/ALSAPulseAudio


Example Flowgraph

This flowgraph should play a 1 kHz tone out of your speakers. Note that you don't need a throttle block, the Audio Sink should throttle for you.

Audio-sink-ex.png