(Commercial Monophonic Music Segmentation Database) is a musical data set for note-level segmentation
of monophonic music. It contains 36 excerpts from commercial recordings of monophonic classical western music and features
the instrument groups strings, woodwind and brass. The excerpts are self-contained phrases with a mean length of 17.97 seconds and an
average of 20 notes. All phrases are played in moderate tempo, mostly with significant amounts of expressive
articulation. A manually annotated ground truth splits each item into a sequence of the three states note,
transition and rest. The set is designed as an open source project, aiming at the development and evaluation
of algorithms for segmentation, music performance analysis and feature selection.