NetBSD/usr.bin/audio/record/audiorecord.1

.\"	$NetBSD: audiorecord.1,v 1.25 2002/02/10 16:46:44 wiz Exp $
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.\" Copyright (c) 1998-1999 Matthew R. Green
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.Dd January 15, 2002
.Dt AUDIORECORD 1
.Os
.Sh NAME
.Nm audiorecord
.Nd record audio files
.Sh SYNOPSIS
.Nm
.Op Fl afhV
.Op Fl b Ar balance
.Op Fl F Ar format
.Op Fl c Ar channels
.Op Fl d Ar device
.Op Fl e Ar encoding
.Op Fl i Ar info
.Op Fl m Ar monvol
.Op Fl P Ar precision
.Op Fl p Ar input
.Op Fl s Ar rate
.Op Fl t Ar time
.Op Fl v Ar volume
.Op files
.Sh DESCRIPTION
The
.Nm
program copies the audio devices to the named audiofile, or the standard
output if no file is named.
The output file will contain either a Sun/NeXT audio header (default), a
RIFF/WAVE audio header or no header at all.  For Sun output files when
using a linear PCM encoding, we always output big-endian signed samples,
possibly after converting these from little-endian and/or unsigned
samples.  For RIFF/WAVE files, we always use little-endian, signed
samples, also converting if necessary (there is no support for RIFX output.)
.Sh OPTIONS
The following options are available:
.Bl -tag -width 123456
.It Fl a
Append to the specified file, rather than overwriting.
.It Fl b
Set the balance to
.Ar balance .
This value must be between 0 and 63.
.It Fl F
Set the output header format to
.Ar format .
Currently supported formats are
.Dq sun ,
.Dq wav
and
.Dq none
for Sun/NeXT audio, WAV and no header, respectively.
.It Fl c
Set number of channels to
.Ar channels .
.It Fl d
Set the audio device to be
.Ar device .
The default is
.Pa /dev/audio0 .
.It Fl e
Set encoding to either
.Dq alaw ,
.Dq ulaw
or
.Dq linear ,
or any other value reported by
.Ic audioctl encodings .
The default encoding is
.Dq ulaw .
If the output format is
.Dq sun ,
the file will contain slinear_be samples, if it is
.Dq wav ,
then slinear_le, independent of the argument to
.Fl e .
Setting the argument to
.Fl e
still may be important since it is used in an
.Xr ioctl 2
call to the kernel to choose the kind of data provided.
.It Fl f
Force.  Normally when appending to audiofiles using the
.Fl a
option, the sample rates must match.  The
.Fl f
option will allow a discrepancy to be ignored.
.It Fl h
Print a help message.
.It Fl i
If the audio device cannot be opened, exit now rather than wait for it.
.It Fl m
Set the monitor volume.
.It Fl P
Set the precision.  This value is the number of bits per sample, and is
normally either
.Dq 8
or
.Dq 16 ,
though the values
.Dq 4 ,
.Dq 24
and
.Dq 32
are also valid.
.It Fl p
Set the output port to
.Ar port .
The valid values of
.Ar port
are
.Dq speaker ,
.Dq headphone
and
.Dq line .
.It Fl s
Set the sampling rate.  This value is per-second.  Typical values are
8000, 44100 and 48000, which are the telephone, CD Audio and DAT Audio
default sampling rates.
.It Fl t
Sets the maximum amount of time to record.  Format is [hh:]mm:ss.
.It Fl q
Be quiet.
.It Fl V
Be verbose.
.It Fl v
Set the volume (gain) to
.Ar volume .
This value must be between 0 and 255.
.El
.Sh ENVIRONMENT
.Bl -tag -width AUDIOCTLDEVICE
.It AUDIOCTLDEVICE
the audio control device to be used.
.It AUDIODEVICE
the audio device to be used.
.El
.Sh SEE ALSO
.Xr audioctl 1 ,
.Xr audioplay 1 ,
.Xr aria 4 ,
.Xr audio 4 ,
.Xr audioamd 4 ,
.Xr auich 4 ,
.Xr autri 4 ,
.Xr auvia 4 ,
.Xr clcs 4 ,
.Xr clct 4 ,
.Xr cmpci 4 ,
.Xr eap 4 ,
.Xr emuxki 4 ,
.Xr esm 4 ,
.Xr eso 4 ,
.Xr ess 4 ,
.Xr fms 4 ,
.Xr gus 4 ,
.Xr guspnp 4 ,
.Xr neo 4 ,
.Xr sb 4 ,
.Xr sv 4 ,
.Xr wss 4 ,
.Xr yds 4 ,
.Xr ym 4
.Sh HISTORY
The
.Nm
program was first seen in SunOS 5.  It was first made available in
.Nx 1.4 .
RIFF/WAVE support, and support for converting signed/unsigned and
big/little-endian samples was first made available in
.Nx 1.6 .
.Sh AUTHORS
The
.Nm
program was written by Matthew R. Green \*[Lt]mrg@eterna.com.au\*[Gt].
.Sh BUGS
WAV big-endian samples are converted to little-endian, rather than
a RIFX header being written.