for automatic key or tonality recognition, e.g. using musical rules or a knowledge base

Full Title

Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments > Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal > for automatic key or tonality recognition, e.g. using musical rules or a knowledge base