A computer system is described which performs polyphonic transcription of known solo piano music by using high-level musical information to guide a signal-processing system. This process, which we term expressive performance extraction, maps a digital audio representation of a musical performance to a MIDI representation of the same performance using the score of the music as a guide. Analysis of the accuracy of the system is presented, and its usefulness both as a tool for music-psychology researchers and as an example of a musical-knowledgebased signal-processing system is discussed. 1 Introduction Traditionally, transcription systems (computer systems which can extract symbolic musical information from a digital-audio signal) have been built via signal processing from the bottom up. In this paper, we examine a method for performing a restricted form of transcription by using a high-level music-understanding system to inform and constrain a signal-processing algorithm. The goal of ...
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Eric D. Scheirer (1998) studied this question.