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.TH TINYCAP 1 "October 2, 2016" "tinycap" "TinyALSA"
.SH NAME
tinycap \- captures audio from an audio device
.SH SYNOPSIS
.B tinycap\fR [ \fIfile\fR ] [ \fIoptions\fR ]
.SH Description
\fBtinycap\fR can record audio from an audio device to a wav file or standard output (as raw samples).
Options can be used to specify various hardware parameters to open the PCM with.
.SH OPTIONS
.TP
\fB\-D\fR \fIcard\fR
Card number of the PCM.
The default is 0.
.TP
\fB\-d\fR \fIdevice\fR
Device number of the PCM.
The default is 0.
.TP
\fB\-M\fR
Use memory-mapped I/O method.
If this option is not specified, then read and write I/O method will be used.
.TP
\fB\-c\fR \fIchannels\fR
Number of channels the PCM will have.
The default is 2.
.TP
\fB\-r\fR \fIrate\fR
Number of frames per second of the PCM.
The default is 48000.
.TP
\fB\-b\fR \fIbits\fR
Number of bits per sample the PCM will have.
The default is 32.
.TP
\fB\-p\fR \fIperiod_size\fR
Number of frames in a period.
The default is 1024.
.TP
\fB\-n\fR \fIperiods\fR
Number of periods the PCM will have.
The default is 4.
.TP
\fB\-t\fR \fIseconds\fR
Number of seconds to record audio.
.SH SIGNALS
When capturing audio, SIGINT will stop the recording and close the file.
.SH EXAMPLES
.TP
\fBtinycap output.wav\fR
Records a file called output.wav until an interrupt signal is caught.
.TP
\fBtinycap output.wav -D 1 -t 2
Records a file called output.wav from card 1 for two seconds or until an interrupt signal is caught.
.TP
\fBtinycap -- -t 3
Records to standard output for three seconds or until an interrupt signal is caught.
.SH BUGS
Please report bugs to https://github.com/tinyalsa/tinyalsa/issues.
.SH SEE ALSO
.BR tinyplay(1),
.BR tinymix(1),
.BR tinypcminfo(1)
.SH AUTHORS
Simon Wilson
.P
For a complete list of authors, visit the project page at https://github.com/tinyalsa/tinyalsa.
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