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# aubio

aubio is a library to label music and sounds. It listens to audio signals and attempts to detect events. For instance, when a drum is hit, at which frequency is a note, or at what tempo is a rhythmic melody.

Its features include segmenting a sound file before each of its attacks, performing pitch detection, tapping the beat and producing midi streams from live audio.

aubio provide several algorithms and routines, including:

• several onset detection methods
• different pitch detection methods
• tempo tracking and beat detection
• MFCC (mel-frequency cepstrum coefficients)
• FFT and phase vocoder
• up/down-sampling
• digital filters (low pass, high pass, and more)
• spectral filtering
• sound file read and write access
• various mathematics utilities for music applications

The name aubio comes from audio with a typo: some errors are likely to be found in the results.

## Python module

A python module for aubio is provided. For more information on how to use it, please see the file python/README.md and the manual .

## Tools

The python module comes with the following command line tools:

• aubio extracts informations from sound files
• aubiocut slices sound files at onset or beat timestamps

Additional command line tools are included along with the library:

• aubioonset outputs the time stamp of detected note onsets
• aubiopitch attempts to identify a fundamental frequency, or pitch, for each frame of the input sound
• aubiomfcc computes Mel-frequency Cepstrum Coefficients
• aubiotrack outputs the time stamp of detected beats
• aubionotes emits midi-like notes, with an onset, a pitch, and a duration
• aubioquiet extracts quiet and loud regions

## Documentation

https://aubio.org/documentation

## Build Instructions

aubio compiles on Linux, Mac OS X, Windows, Cygwin, and iOS.

To compile aubio, you should be able to simply run:

make

To compile the python module:

./setup.py build

## Homepage

aubio is free software: you can redistribute it and/or modify it 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.

## Contributing

Patches are welcome: please fork the latest git repository and create a feature branch. Submitted requests should pass all continuous integration tests.