Music signals have a very particular structure that require specific methods for analyzing their content or retrieving information from them. Signal processing methods for musical analysis are aimed at analyzing musical parameters such as rythm, structure and genre. Moreover, pitch detection methods can be used to retrieve the pitch or notes of one or several instruments within a musical piece. Source localization and separation algorithms can be also particularized to music signals in order to obtain information from the different instruments that make up a given sound segment.