1:arecord
From Linux Man Pages
Contents |
NAME
| arecord, aplay - command-line sound recorder and player for ALSA soundcard driver |
SYNOPSIS
| arecord [flags] [filename] |
SYNOPSIS
|
aplay [flags] [filename [filename]] ... |
DESCRIPTION
|
arecord is a command-line soundfile recorder for the ALSA soundcard driver. It supports several file formats and multiple soundcards with multiple devices. |
|
aplay is much the same, only it plays instead of recording. For supported soundfile formats, the sampling rate, bit depth, and so forth can be automatically determined from the soundfile header. |
INVOKING
|
[arecord | aplay ] [flags] filename |
|
If filename is not specified, the standard output or input is used. The aplay utility accepts multiple filenames. |
| Options |
| -h, --help |
| Help: show syntax. |
| --version |
| Print current version. |
| -l, --list-devices |
| List all soundcards and digital audio devices |
| -L, --list-pcms |
| List all PCMs defined |
| -D, --device=NAME |
| Select PCM by name |
| -q --quiet |
| Quiet mode. Suppress messages (not sound :)) |
| -t, --file-type TYPE |
| File type (voc, wav, raw or au) |
| -c, --channels=# |
| The number of channels |
| -f --format=FORMAT |
|
Sample format |
-f cd (16 bit little endian, 44100, stereo [-f S16_LE -c2 -r44100] -f dat (16 bit little endian, 48000, stereo) [-f S16_LE -c2 -r48000] |
| -r, --rate=#<Hz> |
| Sampling rate in Hertz. |
| -d, --duration=# |
| Interrupt after # seconds |
| -s, --sleep-min=# |
| Min ticks to sleep |
| -M, --mmap |
| Mmap stream |
| -N, --nonblock |
| Nonblocking mode |
| -F, --period-time=# |
| Distance between interrupts is # microseconds |
| -B, --buffer-time=# |
| Buffer duration is # microseconds |
| --period-size=# |
| Distance between interrupts is # frames |
| --buffer-size=# |
| Buffer duration is # frames |
| -A, --avail-min=# |
|
Min available space for wakeup is # microseconds |
| -R, --start-delay=# |
|
Delay for automatic PCM start is # microseconds (relative to buffer size if <= 0) |
| -T, --stop-delay=# |
|
Delay for automatic PCM stop is # microseconds from xrun |
| -v, --verbose |
|
Show PCM structure and setup. This option is accumulative. The VU meter is displayed when this is given twice. |
| -I, --separate-channels |
| One file for each channel |
| Example: |
|
aplay -c 1 -t raw -r 22050 -f mu_law foobar |
|
will play the raw file "foobar" as a 22050-Hz, mono, 8-bit, Mu-Law .au file. |
|
arecord -d 10 -f cd -t wav -D copy foobar.wav |
|
will record foobar.wav as a 10-second, CD-quality wave file, using the PCM "copy" (which might be defined in the user's .asoundrc file as: |
pcm.copy {
type plug
slave {
pcm hw
}
route_policy copy
}
|
SEE ALSO
| alsamixer(1), amixer(1) |
BUGS
|
Note that .aiff files are not currently supported. |
AUTHOR
|
arecord and aplay are by Jaroslav Kysela <perex@suse.cz> This document is by Paul Winkler <zarmzarm@erols.com>. Updated for Alsa 0.9 by James Tappin <james@xena.uklinux.net> |