Music – Instruments – Electrical musical tone generation
Patent
1989-04-06
1990-08-28
Perkey, W. B.
Music
Instruments
Electrical musical tone generation
84637, G10H 138
Patent
active
049515446
ABSTRACT:
A melody harmonization apparatus is disclosed which can determine and produce available chords as many as there are for each segment (e.g., bar) of a given melody. In determining available chords, the apparatus does not need excessive constraints or merely hypothesized assumptions with respect to a melody under analysis such as no change of key throughout the melody and particular tonal musical effect or function of last melody notes. In an embodiment, a set of chord candidates are scanned. Each chord candidate is tentatively assumed available for a melody segment of interest. Then melody tones in that melody segment are analyzed and identified in a forward reasoning by exploring a network of musical knowledge of classifying melody tone functions or characters based on the tentative assumption while checking local melodic waves or movements. The reasoning continues either until a contradiction or counterexample of the tentative assumption is found or until a verification or justification of the assumption has been made as the case may be. Thus the associated chord candidate is determined available in the latter case and inavailable in the former case.
REFERENCES:
patent: 4539882 (1985-09-01), Yuzawa
Cadio Computer Co., Ltd.
Perkey W. B.
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