audiorecord(1) - NetBSD Manual Pages

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AUDIORECORD(1)          NetBSD General Commands Manual          AUDIORECORD(1)


NAME

     audiorecord -- record audio files


SYNOPSIS

     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


DESCRIPTION

     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.


OPTIONS

     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
                    device.

     -b balance     Set the balance to balance.  This value must be between 0
                    and 63.

     -c channels    Set number of channels to channels.

     -d device      Set the audio device to be device.  The default is
                    /dev/sound.

     -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
                    output header.

     -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
                    [hh:]mm:ss[.dddddd].

     -V             Be verbose.

     -v volume      Set the volume (gain) to volume.  This value must be
                    between 0 and 255.


ENVIRONMENT

     AUDIOCTLDEVICE  the audio control device to be used.

     AUDIODEVICE     the audio device to be used.


SEE ALSO

     audioctl(1), audioplay(1), aria(4), audio(4), audioamd(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), sv(4),
     wss(4), yds(4), ym(4)


HISTORY

     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
     NetBSD 1.6.


AUTHORS

     The audiorecord program was written by Matthew R. Green
     <mrg@eterna.com.au>.


BUGS

     WAV big-endian samples are converted to little-endian, rather than a RIFX
     header being written.

NetBSD 6.1.2                   December 30, 2010                  NetBSD 6.1.2