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AUDIORECORD(1) NetBSD General Commands Manual AUDIORECORD(1)
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audiorecord -- record audio files
audiorecord [-afhqV] [-B buffersize] [-b balance] [-c channels]
[-d device] [-e encoding] [-F format] [-i info] [-m monvol]
[-P precision] [-p port] [-s rate] [-t time] [-v volume] file
The audiorecord program copies the audio device to the named audiofile
or, if the file name is -, to the standard output.
The output file will contain either a Sun/NeXT audio header, a RIFF/WAVE
audio header or no header at all. Sun output files using a linear PCM
encoding are written with big-endian signed samples, possibly after con-
verting these from little-endian or unsigned samples. RIFF/WAVE files
are written in little-endian, signed samples, also converting if neces-
sary. The default output is Sun/NeXT format, but if the output file file
ends with a .wav file extension it will be written as RIFF/WAVE.
The following options are available:
-a Append to the specified file, rather than overwriting.
-B buffersize Set the audio device read buffer size to buffersize. The
default value is the record.buffer_size of the audio
-b balance Set the balance to balance. This value must be between 0
-c channels Set number of channels to channels.
-d device Set the audio device to be device. The default is
-e encoding Set encoding to either ``alaw'', ``ulaw'', or ``linear'',
or any other value reported by audioctl encodings. The
default encoding is ``ulaw''. If the output format is
``sun'', the file will contain slinear_be samples, if it
is ``wav'', then slinear_le, independent of the argument
to -e. Setting the argument to -e still may be important
since it is used in an ioctl(2) call to the kernel to
choose the kind of data provided.
-F format Set the output header format to format. Currently sup-
ported formats are ``sun'', ``wav'', and ``none'' for
Sun/NeXT audio, WAV, and no header, respectively.
-f Force. Normally when appending to audiofiles using the -a
option, the sample rates must match. The -f option will
allow a discrepancy to be ignored.
-h Print a help message.
-i info If supported by the -F format, add the string info to the
-m monvol Set the monitor volume.
-P precision Set the precision. This value is the number of bits per
sample, and is normally either ``8'' or ``16'', though the
values ``4'', ``24'', and ``32'' are also valid.
-p port Set the input port to port. The valid values of port are
``cd'', ``internal-cd'', ``mic'', and ``line''.
-q Be quiet.
-s rate Set the sampling rate. This value is per-second. Typical
values are 8000, 44100, and 48000, which are the tele-
phone, CD Audio, and DAT Audio default sampling rates.
-t time Sets the maximum amount of time to record. Format is
-V Be verbose.
-v volume Set the volume (gain) to volume. This value must be
between 0 and 255.
AUDIOCTLDEVICE the audio control device to be used.
AUDIODEVICE the audio device to be used.
audioctl(1), audioplay(1), aria(4), audio(4), auich(4), autri(4),
auvia(4), clcs(4), clct(4), cmpci(4), eap(4), emuxki(4), esm(4), eso(4),
ess(4), fms(4), gus(4), guspnp(4), neo(4), sb(4), sparc/audioamd(4),
sv(4), wss(4), yds(4), ym(4)
The audiorecord program was first seen in SunOS 5. It was first made
available in NetBSD 1.4. RIFF/WAVE support, and support for converting
signed/unsigned and big/little-endian samples was first made available in
The audiorecord program was written by Matthew R. Green
WAV big-endian samples are converted to little-endian, rather than a RIFX
header being written.
NetBSD 9.99 January 31, 2020 NetBSD 9.99