audiorecord(1) manual page
Table of Contents
audiorecord - record an audio file
audiorecord [ -af ] [
-v vol ] [ -b bal ] [ -m monvol ] [ -p mic | line | internal-cd ] [ -c channels
] [ -s rate ] [ -e encoding ] [ -t time ] [ -i info ] [ -d dev ] [ file
]
SUNWaudio
audiorecord copies audio data from
the audio device to a named audio file (or the standard output if no filename
is present). If no output file is specified and standard output is a tty,
the volume, balance, monitor volume, port, and audio format settings specified
on the command line will be applied and the program will exit.
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, CTRL-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, another process currently has read access),
audiorecord prints an error message and exits immediately.
- -a
- Append:
Append the data on the end of the named audio file. The audio device must
support the audio data format of the existing file.
- -f
- Force: When the -a
flag is specified, the sample 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.
- -v vol
- Volume: The recording gain is set to the specified
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 will remain
at the level most recently set by any process.
- -b bal
- Balance: The recording
balance is set to the specified value before recording begins, and is reset
to its previous level when audiorecord exits. The bal argument is an integer
value between -100 and 100, inclusive. A value of -100 indicates left balance,
0 middle, and 100 right. If this argument is not specified, the input balance
will remain at the level most recently set by any process.
- -m monvol
- Monitor Volume: The input monitor volume is set to the specified
value before recording begins, and is reset to its previous level when
audiorecord exits. The monval argument is an integer value between 0 and
100, inclusive. A non-zero value allows a directly connected input source
to be heard on the output speaker while recording is in-progress. If this
argument is not specified, the monitor volume will remain at the level
most recently set by any process.
- -p mic | line | internal-cd
- Input Port: Select
the mic, line, or internal-cd input as the source of the audio output signal.
If this argument is not specified, the input port will remain unchanged.
Some systems will not support all possible input ports. If the named port
does not exist, this option is ignored.
- -c channels
- Channels: Specify the
number of audio channels (1 or 2). The value may be specified as an integer
or as the string mono or stereo. The default value is mono.
- -s rate
- Sample
Rate: Specify the sample rate, in samples per second. If a number is followed
by the letter k, it is multiplied by 1000 (for example, 44.1k = 44100). The
default sample rate is 8 kHz.
- -e encoding
- Encoding: Specify the audio data
encoding. This value may be one of ulaw, alaw, or linear. The default encoding
is ulaw.
- -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 number of seconds, or in the form: hh:mm:ss.dd, where the hour and minute
specifications are optional.
- -i info
- Information: The ‘information’ field of
the output file header is set to the string specified by the info argument.
This option cannot be specified in conjunction with the -a argument.
- -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.
- file
- 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 the
standard output.
- -\?
- Help: Print a command line usage message.
- 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.
audioconvert(1)
, audioplay(1)
, audio(7I)
, audiocs(7D)
audioamd(7D)
,
dbri(7D)
sbpro(7D)
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