Madmom is an audio signal processing library written in Python with a strong focus on music information retrieval (MIR) tasks. The library is internally used by the Department of Computational Perception, Johannes Kepler University, Linz, Austria (http://www.cp.jku.at) and the Austrian Research Institute for Artificial Intelligence (OFAI), Vienna, Austria (http://www.ofai.at). It includes reference implementations for some music information retrieval algorithms, please see the References section. Documentation of the package can be found online http://madmom.readthedocs.org The package has two licenses, one for source code and one for model/data files.