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The pitch range of an instrument is the distance between the lowest and highest tones it can accurately produce. The pitch range of a piano with 88 keys is 7/12 octaves, with middle C vibrating at 256 Hz, the highest note vibrating at 4,186 Hz, and the lowest note A vibrating at 27.5 Hz. Here are some sample pitch ranges of familiar instruments.
Automatic arrangement method, automatic arrangement device, and computer program product
The present invention provides an automatic arrangement method, an automatic arrangement device, and a computer program product, which can produce arrangement data that is easy to play and has a reduced number of simultaneously sounding notes from musical piece data. The present invention determines an outer sound symbol, and the outer sound symbol is the highest in pitch among notes that have substantially the same sounding start time in a melody part obtained from the musical piece data. A melody part from which an inner sound symbol is deleted is produced, and the inner sound symbol starts to sound during the sounding period of the outer sound symbol and is low in pitch. For each pitch range in which the pitch range of one octave is staggered by one semitone, a candidate accompaniment part in which the root notes of each chord of the chord data of the musical piece data are arranged to sound at their sounding timing is produced, and an accompaniment part is selected therefrom. The arrangement data obtained from the melody part and the accompaniment part can be set as arrangement data that is easy to play and has a reduced number of simultaneously sounding notes.
Owner:ROLAND CORP