Patent ID: 8648241
Filing Date: 2014-02-11
Classification: G10H

Abstract:
1. A key determination apparatus comprising: a manipulator information obtaining unit configured to obtain at least a melody note corresponding to a manipulator manipulated; a storage device including (a) a register configured to store at least (i) a melody note history of melody notes corresponding to manipulators manipulated and (ii) key candidates, based on information obtained by the manipulator information obtaining unit, and (b) a first table configured to store diatonic scale notes for each of the key candidates; and a key determination unit configured to compare the melody note history with the diatonic scale notes for each of the key candidates and determine whether there is a key candidate in which all of the melody notes in the melody note history coincide with any of the diatonic scale notes of the key candidate, thereby determining a key of a musical composition played by the manipulation of the manipulators, and storing the determined key in the register.