A tool designed for the extraction of annotations from audio signals. 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.
From aubio.org:
What is aubio?
aubio is a tool designed for the extraction of annotations from audio signals. 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.
Because these tasks are difficult, we thought it was important to gather them in a dedicated library. To increase the fun, we have made these algorithms work in a causal way, so as to be used in real time applications with as low delay as possible. Functions can be used offline in sound editors and software samplers, or online in audio effects and virtual instruments.
Features
aubio currently provides the following features:
- digital filters
- phase vocoder
- onset detection (several methods)
- pitch tracking (several methods)
- beat and tempo tracking
- mel frequency cepstrum coefficients (MFCC)
- transient / steady-state separation
Implementation
aubio is written in C. The functions can be called from C++, and a wrapper has been written using SWIG. The python interface is already usable, and it would probably be a matter of seconds to add access to the other languages supported by SWIG (including perl, java and many more).
Currently, aubio depends on libsndfile, libsamplerate and FFTW. On Linux platforms, aubio can be built using JACK, and ALSA.
