Editing Music information retrieval (section)

===Automatic music transcription===
Automatic [[Transcription (music)|music transcription]] is the process of converting an audio recording into symbolic notation, such as a score or a [[MIDI file#File formats|MIDI file]].<ref>A. Klapuri and M. Davy, editors. Signal Processing Methods for Music Transcription. Springer-Verlag, New York, 2006.</ref> This process involves several audio analysis tasks, which may include multi-pitch detection, [[Onset detection#Onset detection|onset detection]], duration estimation, instrument identification, and the extraction of [[harmonic]], [[Rhythm|rhythmic]] or [[Melody|melodic]] information. This task becomes more difficult with greater numbers of instruments and a greater [[Polyphony and monophony in instruments|polyphony level]].