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aplay/arecord - show the default settings

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See bug#534 for more details.
This commit is contained in:
Jaroslav Kysela 2005-11-14 10:11:50 +00:00
parent 9dc666526f
commit 9a335c4613
1 changed files with 16 additions and 7 deletions
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23
aplay/aplay.1
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@ -39,10 +39,12 @@ Select PCM by name
Quiet mode. Suppress messages (not sound :)) Quiet mode. Suppress messages (not sound :))
.TP .TP
\fI\-t, \-\-file\-type TYPE\fP \fI\-t, \-\-file\-type TYPE\fP
File type (voc, wav, raw or au) File type (voc, wav, raw or au).
If this parameter is omitted the WAVE format is used.
.TP .TP
\fI\-c, \-\-channels=#\fP \fI\-c, \-\-channels=#\fP
The number of channels The number of channels.
The default is one channel.
.TP .TP
\fI\-f \-\-format=FORMAT\fP \fI\-f \-\-format=FORMAT\fP
Sample format Sample format
@ -59,9 +61,10 @@ There are also two format shortcuts available:
\-f cd (16 bit little endian, 44100, stereo [\-f S16_LE \-c2 \-r44100] \-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] \-f dat (16 bit little endian, 48000, stereo) [\-f S16_LE \-c2 \-r48000]
.fi .fi
If no format is given U8 is used.
.TP .TP
\fI\-r, \-\-rate=#<Hz>\fP \fI\-r, \-\-rate=#<Hz>\fP
Sampling rate in Hertz. Sampling rate in Hertz. The default rate is 8000 Hertz.
.TP .TP
\fI\-d, \-\-duration=#\fP \fI\-d, \-\-duration=#\fP
Interrupt after # seconds. Interrupt after # seconds.
@ -69,25 +72,31 @@ A value of zero means infinity.
The default is zero, so if this option is omitted then the arecord process will run until it is killed. The default is zero, so if this option is omitted then the arecord process will run until it is killed.
.TP .TP
\fI\-s, \-\-sleep\-min=#\fP \fI\-s, \-\-sleep\-min=#\fP
Min ticks to sleep Min ticks to sleep. The default is not to sleep.
.TP .TP
\fI\-M, \-\-mmap\fP \fI\-M, \-\-mmap\fP
Mmap stream Use memory-mapped (mmap) I/O mode for the audio stream.
If this option is not set, the read/write I/O mode will be used.
.TP .TP
\fI\-N, \-\-nonblock\fP \fI\-N, \-\-nonblock\fP
Nonblocking mode Open the audio device in non-blocking mode. If the device is busy the program will exit immediatly.
If this option is not set the program will block until the audio device is available again.
.TP .TP
\fI\-F, \-\-period\-time=#\fP \fI\-F, \-\-period\-time=#\fP
Distance between interrupts is # microseconds Distance between interrupts is # microseconds.
If no period time and no period size is given then a quarter of the buffer time is set.
.TP .TP
\fI\-B, \-\-buffer\-time=#\fP \fI\-B, \-\-buffer\-time=#\fP
Buffer duration is # microseconds Buffer duration is # microseconds
If no buffer time and no buffer size is given then the maximal allowed buffer time but not more than 500ms is set.
.TP .TP
\fI\-\-period\-size=#\fP \fI\-\-period\-size=#\fP
Distance between interrupts is # frames Distance between interrupts is # frames
If no period size and no period time is given then a quarter of the buffer size is set.
.TP .TP
\fI\-\-buffer\-size=#\fP \fI\-\-buffer\-size=#\fP
Buffer duration is # frames Buffer duration is # frames
If no buffer time and no buffer size is given then the maximal allowed buffer time but not more than 500ms is set.
.TP .TP
\fI\-A, \-\-avail\-min=#\fP \fI\-A, \-\-avail\-min=#\fP
Min available space for wakeup is # microseconds Min available space for wakeup is # microseconds