Audio Source audio_source from gnuradio import audio audio.source($samp_rate, $device_name, $ok_to_block) Sample Rate samp_rate 32000 enum 16KHz 16000 22.05KHz 22050 24KHz 24000 32KHz 32000 44.1KHz 44100 48KHz 48000 Device Name device_name string OK to Block ok_to_block True enum Yes True No False Num Outputs num_outputs 1 int 0 < $num_outputs out float $num_outputs Not all sampling rates will be supported by your hardware. Leave the device name blank to choose deafult audio device. \ Audio device names may look like hw:0,0 The audio source can have multiple outputs depending upon your hardware. \ For example, set the outputs to 2 for stereo audio.