This directory contains a utility application that uses the AudioCapturer interface and the WavWriter class to record a waveform audio file.
wav_recorder [options] <filename>
Record an audio signal from the specified source to a .wav file.
Valid options:
By default, use the preferred input device
--loopback Capture final-mix output from the preferred output device
By default, use device-preferred channel count and frame rate, in 32-bit float samples
--chans=<NUM_CHANS> Specify the number of channels (min 1, max 8)
--rate=<rate> Specify the capture frame rate, in Hz (min 1000, max 192000)
--int24 Record and save as left-justified 24-in-32 int ('padded-24')
--packed24 Record as 24-in-32 'padded-24'; save as 'packed-24'
--int16 Record and save as 16-bit integer
By default, don't set AudioCapturer gain and mute (unity 0 dB, unmuted)
--gain[=<GAIN_DB>] Set stream gain, in dB (min -160.0, max +24.0, default 0.0)
--mute[=<0|1>] Set stream mute (0=Unmute, 1=Mute, if only '--mute' then Mute)
By default, use packet-by-packet ('synchronous') mode
--async Capture using sequential-buffer ('asynchronous') mode
By default, use the default reference clock
--flexible-clock Use the 'flexible' reference clock provided by the Audio service
--monotonic-clock Set the local system monotonic clock as reference for this stream
--custom-clock Use a custom clock as this stream's reference clock
--rate-adjust[=<PPM>] Run faster/slower than local system clock, in parts-per-million
(min -1000, max 1000; -75 if unspecified). Implies '--custom-clock'
By default, capture audio using packets of 100.0 msec
--packet-ms=<MSECS> Specify the duration (in milliseconds) of each capture packet
Minimum packet duration is 1.0 millisec
By default, capture until a key is pressed
--duration[=<SECS>] Specify a fixed duration rather than waiting for keystroke
(min 0.0, max 86400.0, default 2.0)
--ultrasound Capture from an ultrasound capturer
--v Display per-packet information
--help, --? Show this message