NAME

       jack-stdin - write JACK audio data to stdin

SYNOPSIS

       jack-stdin [OPTIONS] port1 [ port2 ...]

DESCRIPTION

       jack-stdin reads raw audio data from standard-input and writes it to a JACK audio port.

       The  number of given ports detemine the number of audio channels that are used.  If more than one channel
       is given, the input audio-sample data needs to be interleaved.

OPTIONS

       -b, --bitdepth BITS
              Specify the bit-depth of each sample. For integer-encoding this can be 16 or 24.  The  default  is
              16.   This setting is only used for integer encoding: Floating-point samples will always be 32 bit
              wide.

       -d, --duration SEC
              Specify the time for which jack-stdin should run in seconds.  A value less than  1  means  to  run
              indefinitely. The default is 0 which reads until end-of-file.

       -e, --encoding FORMAT
              Set  the  input  format  of  the  data: signed-integer, unsigned-integer, floating-point (default:
              signed)

       -f, --file FILENAME
              Read data from given file instead of standard-input.

       -h, --help
              Print a brief usage information

       -p, --prebuffer PERCENT
              Pre-fill the buffer before starting audio output to JACK  (default  50.0%).   NOTE:  disable  pre-
              buffering (-p 0) or use a small buffer size to play back very short samples.

       -L, --little-endian
              The input-data is in little-endian byte-order or native-byte-order float (this is the default)

       -B, --big-endian
              Interpret input audio data in big-endian byte-order or swap the byte-order of floating-point.

       -q, --quiet
              Inhibit usual output.  This affects information and buffer-overflow warnings but not setup-errors.

       -S, --bufsize SAMPLES
              Choose  the  internal  buffer-size in samples. The default size is 65536.  The given value will be
              multiplied by the number of channels and bit-depth to get the size of the ring-buffer.  Note:  the
              buffersize must be larger than JACK's period size.

EXAMPLES

         jack-stdout vlc_31994:out_1 vlc_31994:out_2 \
            | sox -t raw -r 48k -e signed -b 16 -c 2 - \
                  -t raw -r 48k -e signed -b 16 -c 2 - \
               tremolo 5 100 \
            | ./jack-stdin system:playback_1 system:playback_2

         cat /dev/dsp \
            | jack-stdin system:playback_1 system:playback_2

KNOWN ISSUES

       jack-stdin is not suitable to play-back files shorter than twice the jack-period size.

AUTHOR

       Robin Gareus <robin@gareus.org>.

SEE ALSO

       http://jackaudio.org/,

                                                  30 March 2011                                    JACK-STDIN(1)