A computerized method and apparatus for providing a comparison between a performance and a performance score in order to provide coordinated accompaniment with the performance. The performance is converted into a performance related signal and is compared with a performance score. If a predetermined...http://www.google.fr/patents/US4745836?utm_source=gb-gplus-shareBrevet US4745836 - Method and apparatus for providing coordinated accompaniment for a performance
Method and apparatus for providing coordinated accompaniment for a performance
