NAME

       jack_capture - A program for recording anything from jack

SYNOPSIS

       jack_capture [options]
       bar [options]

DESCRIPTION

       This manual page documents briefly the jack_capture command.  This manual page was written for the Debian
       distribution because the original program does not have a manual page.

       jack_capture is a cli program for recording any audio signal from jack to audio audio  formats  supported
       by libsndfile library (wav, aiff, ogg, flac, wavex, au, etc.)

       For more info about libsndfile see http://www.mega-nerd.com/libsndfile/api.html#open

OPTIONS

       These  programs  follow  the  usual  GNU  command line syntax, with long options starting with two dashes
       (`-').  A summary of options is included below.

       -b, --bitdepth n
              is by default FLOAT. It can be set to either 8, 16, 24 or 32. (for relevant formats)

       -c, --channels n
              is by default 2.

       -p, --port port
              is by default set to the two first physical outputs. The "port" argument  can  be  specified  more
              than once.

       -d, --duration s
              Recording is stopped after "s" seconds.

       -z, --leading-zeros n
              "n"  is  the number of zeros to in the autogenerated filename.  (-z 2 -> jack_capture_001.wav, and
              so on.) (default is 1)

       -f, --format format
              Selects fileformat provided by libsndfile.  See  http://www.mega-nerd.com/libsndfile/api.html#open
              (Default is wav for 1 or 2 channels, and wavex for more than 2.)

       -pf, --print-formats
              Prints all sound formats provided to sndfile to screen and then exits.

       -v, --version
              Prints out version.

       -s, --silent
              Suppress some common messages printed to the terminal.

       -V, --verbose]
              Prints some extra information to the terminal.

       -mp3, --mp3
              Writes to an mp3 file using liblame (LAME). (the --format option has no effect using this option)

       -mp3q, --mp3-quality n
              Selects  mp3  quality  provided by liblame. n=0 is best, n=9 is worst. Default n is 2. (0 uses the
              most amount of CPU, 9 uses the least)

       -mp3b, --mp3-bitrate n
              Selects mp3 bitrate (in kbit/s). Default is set by liblame. (currently 128)

       -ws, --write-to-stdout
              Writes 16 bit little endian to stdout. (the --format option, the --mp3  option,  and  some  others
              have no effect using this option)

       -dm, --disable-meter
              Disable console meter

       -hbu, --hide-buffer-usage
              Disable buffer usage.

       -dc, --disable-console
              Disable console updates. Same as "-dm -hbu".

       -lm, --linear-meter
              Use linear scale for the console meter (default is dB scale)

       -dBr, --dB-meter-reference
              Specify reference level for dB meter. (default=0)

       -mb, --meterbridge
              Start up meterbridge to monitor recorded sound.

       -mt, --meterbridge-type
              Specify type. vu (default), ppm, dpm, jf or sco.

       -mr, --meterbridge-reference
              Specify reference level for meterbidge.

       -jt, --jack-transport
              Start  program,  but  do  not  start recording until jack transport has started rolling. When jack
              transport stops, the recording is stopped, and the program ends.

       -jtm, --jack-transport-multi
              Similar to --jack-transport, but do not end program when jack transport stops. Instead, record  to
              a new file when jack_transport start rolling again. (not implemented yet)

       -B, --bufsize s
              Initial/minimum  buffer size in seconds. Default is 8 seconds for mp3 files, and 4 seconds for all
              other formats.

       -MB, --maxbufsize
              Maximum  buffer  size  in  seconds.  jack_capture  will  allocate.  Default  is  40.  (Buffer   is
              automatically increased during

       -fn, --filename
              Specify filename. (It's usually easier to set last argument instead)

EXAMPLES

       jack_capture [--bitdepth n] [--channels n] [--port port] [filename]

       jack_capture [-b n] [-c n] [-p port] [filename]

       jack_capture
              To record a stereo file of what you hear.

       ack_capture -f flac
              To record a stereo file of what you hear in the flac format.

       jack_capture -f ogg
              To record a stereo file of what you hear in the ogg format.

       jack_capture -mp3
              To record a stereo file of what you hear in the mp3 format.

       jack_capture --channels 2 --port system:playback*
              To record a stereo file of what you hear in the wav format.

       jack_capture --port jamin:out* sound_from_jamin.wav
              To record the output from jamin.

       jack_capture --port jamin:in* sound_to_jamin.wav
              To record all sound coming in to jamin.

       jack_capture --port jamin* sound_to_and_from_jamin.wav
              To record all sound coming in and out of jamin.

       jack_capture -c 2 -p system:capture*
              To record a stereo file from the soundcard.

SEE ALSO

       jackd(1).

AUTHOR

       jack_capture was written by Kjetil Matheussen

       This  manual page was written by Jaromír Mikeš <mira.mikes@seznam.cz>, for the Debian project (but may be
       used by others).

                                                  July 28, 2010                                  JACK_CAPTURE(1)