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.