audiorecord(1) User Commands audiorecord(1)NAMEaudiorecord - record an audio file
SYNOPSISaudiorecord [-af] [-v vol] [-c channels] [-s rate]
[-e encoding] [-t time] [-i info] [-d dev]
[-T au | aif[f] | wav] [file[.au|.aif[f]]|.wav]
DESCRIPTION
The audiorecord utility copies audio data from the audio device to a
named audio file, or to the standard output if no filename is present.
If no output file is specified and standard output is a tty, the pro‐
gram exits with an error message.
By default, monaural audio data is recorded at 8 kHz and encoded in
-law format. If the audio device supports additional configurations,
the -c, -s, and -e options may be used to specify the data format. The
output file is prefixed by an audio file header that identifies the
format of the data encoded in the file.
Recording begins immediately and continues until a SIGINT signal (for
example, Control-c) is received. If the -t option is specified,
audiorecord stops when the specified quantity of data has been
recorded.
If the audio device is unavailable, that is, if another process cur‐
rently has read access, audiorecord prints an error message and exits
immediately.
OPTIONS
The following options are supported:
-\? Help: Prints a command line usage message.
-a Append: Appends the data on the end of the
named audio file. The audio device must support
the audio data format of the existing file.
-c channels Channels: Specifies the number of audio chan‐
nels (1 or 2). The value may be specified as an
integer or as the string mono or stereo. The
default value is mono.
-d dev Device: The dev argument specifies an alternate
audio device from which input should be taken.
If the -d option is not specified, the AUDIODEV
environment variable is consulted (see below).
Otherwise, /dev/audio is used as the default
audio device.
-e encoding Encoding: Specifies the audio data encoding.
This value may be one of ulaw, alaw, or linear.
The default encoding is ulaw.
-f Force: When the -a flag is specified, the sam‐
ple rate of the audio device must match the
sample rate at which the original file was
recorded. If the -f flag is also specified,
sample rate differences are ignored, with a
warning message printed on the standard error.
-i info Information: The `information' field of the
output file header is set to the string speci‐
fied by the info argument. This option cannot
be specified in conjunction with the -a argu‐
ment.
-s rate Sample Rate: Specifies the sample rate, in sam‐
ples per second. If a number is followed by the
letter k, it is multiplied by 1000 (for exam‐
ple, 44.1k = 44100). The default sample rate is
8 kHz.
-t time Time: The time argument specifies the maximum
length of time to record. Time can be specified
as a floating-point value, indicating the num‐
ber of seconds, or in the form: hh:mm:ss.dd,
where the hour and minute specifications are
optional.
-T au | aif[f] | wav Specifies the audio file type to create. If the
-a option is used, the file type must match the
file to which it is being appended. Regardless
of the file suffix, the type is set as speci‐
fied in this option. If this option is not
specified, the file suffix determines the type.
-v vol Volume: The recording gain is set to the speci‐
fied value before recording begins, and is
reset to its previous level when audiorecord
exits. The vol argument is an integer value
between 0 and 100, inclusive. If this argument
is not specified, the input volume remains at
the level most recently set by any process.
OPERANDS
file[.au|.aif[f]]|.wav
File Specification: The named audio file is rewritten, or appended.
If no filename is present, and standard output is not a tty, or if
the special filename "−" is specified, output is directed to the
standard output.
If the -T option is not specified, the file suffix determines the
type of file. If the suffix is not recognized, the default is .au.
If the -T option is specified, that file type is used regardless of
the file suffix.
USAGE
See largefile(5) for the description of the behavior of audiorecord
when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
ENVIRONMENT VARIABLES
AUDIODEV The full path name of the audio device to record from, if
no -d argument is supplied. If the AUDIODEV variable is not
set, /dev/audio is used.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Architecture │SPARC, x86 │
├─────────────────────────────┼─────────────────────────────┤
│Availability │audio/audio-utilities │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Committed │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOaudioconvert(1), audioctl(1), audioplay(1), attributes(5), large‐
file(5), audio(7I)SunOS 5.11 1 Dec 2009 audiorecord(1)
