NAME

       aubiotrack - a command line tool to extract musical beats from audio signals

SYNOPSIS

       aubiotrack source
       aubiotrack [[-i] source] [-o sink]
                  [-r rate] [-B win] [-H hop]
                  [-T time-format]
                  [-s sil] [-m]
                  [-j] [-N miditap-note] [-V miditap-velo]
                  [-v] [-h]

DESCRIPTION

       aubiotrack  attempts  to detect beats, the time where one would intuitively be tapping his
       foot.

       When started with an input source (-i/--input),  the  detected  beats  are  given  on  the
       console, in seconds.

       When  started  without  an  input  source, or with the jack option (-j/--jack), aubiotrack
       starts in jack mode.

OPTIONS

       This program follows the usual GNU command line syntax, with long  options  starting  with
       two dashes (--). A summary of options is included below.

       -i, --input source
              Run  analysis  on  this audio file. Most uncompressed and compressed are supported,
              depending on how aubio was built.

       -o, --output sink
              Save results in this file. The file will be created on the model of the input file.
              Beats are marked by a short wood-block like sound.

       -r, --samplerate rate
              Fetch  the  input  source, resampled at the given sampling rate. The rate should be
              specified in Hertz as an integer. If 0, the sampling rate of  the  original  source
              will be used. Defaults to 0.

       -B, --bufsize win
              The  size  of  the  buffer  to  analyze,  that is the length of the window used for
              spectral and temporal computations. Defaults to 512.

       -H, --hopsize hop
              The number of samples between two consecutive analysis.  Defaults to 256.

       -s, --silence sil
              Set the silence threshold, in dB, under which the pitch will  not  be  detected.  A
              value  of  -20.0 would eliminate most onsets but the loudest ones. A value of -90.0
              would select all onsets. Defaults to -90.0.

       -m, --mix-input
              Mix source signal to the output signal before writing to sink.

       -f, --force-overwrite
              Overwrite output file if it already exists.

       -j, --jack
              Use Jack input/output. You will need a Jack connection  controller  to  feed  aubio
              some signal and listen to its output.

       -N, --miditap-note
              Override note value for MIDI tap. Defaults to 69.

       -V, --miditap-velop
              Override velocity value for MIDI tap. Defaults to 65.

       -T, --timeformat format
              Set time format (samples, ms, seconds). Defaults to seconds.

       -h, --help
              Print a short help message and exit.

       -v, --verbose
              Be verbose.

BEAT TRACKING METHODS

       Aubio  currently  implements  one  the  causal beat tracking algorithm designed by Matthew
       Davies and described in the following articles:

       Matthew E. P. Davies and Mark D. Plumbley. Causal tempo tracking of audio.  In Proceedings
       of  the  International  Symposium  on  Music  Information Retrieval (ISMIR), pages 164169,
       Barcelona, Spain, 2004.

       Matthew E. P. Davies, Paul Brossier, and Mark D. Plumbley. Beat tracking towards automatic
       musical  accompaniment.  In Proceedings of the Audio Engineering Society 118th Convention,
       Barcelona, Spain, May 2005.

SEE ALSO

       aubioonset(1), aubiopitch(1), aubionotes(1), aubioquiet(1), aubiomfcc(1), and aubiocut(1).

AUTHOR

       This manual page was written by Paul Brossier <piem@aubio.org>. Permission is  granted  to
       copy,  distribute  and/or  modify  this document under the terms of the GNU General Public
       License as published by the Free Software Foundation, either version 3 of the License,  or
       (at your option) any later version.