ref: 7b8e51cdcaeebac5bcb54bd158057b396d580fe3
dir: /doc/aubio.txt/
NAME
aubio - a command line tool to extract information from sound files
SYNOPSIS
aubio [-h] [-V] <command> ...
COMMANDS
The general syntax is "aubio <command> <soundfile> [options]". The following
commands are available:
onset get onset times
pitch extract fundamental frequency
beat get locations of beats
tempo get overall tempo in bpm
notes get midi-like notes
mfcc extract mel-frequency cepstrum coefficients
melbands extract mel-frequency energies per band
For a list of available commands, use "aubio -h". For more info about each
command, use "aubio <command> --help".
GENERAL OPTIONS
These options can be used before any command has been specified.
-h, --help show help message and exit
-V, --version show version
COMMON OPTIONS
The following options can be used with all commands:
<source_uri>, -i <source_uri>, --input <source_uri> input sound file to
analyse (required)
-r <freq>, --samplerate <freq> samplerate at which the file should be
represented (default: 0, e.g. samplerate of the input sound)
-H <size>, --hopsize <size> overlap size, number of samples between two
consecutive analysis (default: 256)
-B <size>, --bufsize <size> buffer size, number of samples used for each
analysis, (e.g. FFT length, default: 512)
-h, --help show help message and exit
-T format, --time-format format select time values output format (samples,
ms, seconds) (default: seconds)
-v, --verbose be verbose (increment verbosity by 1, default: 1)
-q, --quiet be quiet (set verbosity to 0)
ONSET
The following additional options can be used with the "onset" subcommand.
-m <method>, --method <method> onset novelty function
<default|energy|hfc|complex|phase|specdiff|kl|mkl|specflux> (default:
default)
-t <threshold>, --threshold <threshold> threshold (default: unset)
-s <value>, --silence <value> silence threshold, in dB (default: -70)
-M <value>, --minioi <value> minimum Inter-Onset Interval (default: 12ms)
PITCH
The following additional options can be used with the "pitch" subcommand.
-m <method>, --method <method> pitch detection method
<default|yinfft|yin|mcomb|fcomb|schmitt> (default: default, e.g. yinfft)
-t <threshold>, --threshold <threshold> tolerance (default: unset)
-s <value>, --silence <value> silence threshold, in dB (default: -70)
The default buffer size for the beat algorithm is 2048. The default hop size
is 256.
BEAT
The "beat" command accepts all common options and no additional options.
The default buffer size for the beat algorithm is 1024. The default hop size
is 512.
TEMPO
The "tempo" command accepts all common options and no additional options.
The default buffer size for the beat algorithm is 1024. The default hop size
is 512.
NOTES
The following additional options can be used with the "notes" subcommand.
-s <value>, --silence <value> silence threshold, in dB (default: -70)
-d <value>, --release-drop <value> release drop level, in dB. If the level
drops more than this amount since the last note started, the note will be
turned off (default: 10).
MFCC
The "mfcc" command accepts all common options and no additional options.
MELBANDS
The "melbands" command accepts all common options and no additional options.
EXAMPLES
Extract onsets using a minimum inter-onset interval of 30ms:
aubio onset /path/to/input_file -M 30ms
Extract pitch with method "mcomb" and a silence threshold of -90dB:
aubio pitch /path/to/input_file -m mcomb -s -90.0
Extract MFCC using the standard Slaney implementation:
aubio mfcc /path/to/input_file -r 44100
SEE ALSO
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.