Apparatus for determining tonality for chord progression

Details Apparatus for determining tonality for chord progression Apparatus for determining tonality for chord progression

1991-04-05

1993-01-12

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84637, 84669, 84DIG22, G10H 118, G10H 138, G10H 700

Patent

active

051792419

ABSTRACT:
A tonality determining apparatus provides a tonality analysis of a chord progression. The apparatus includes a chord function knowledge database storing musical knowledge of evaluating a function of each chord in the chord progression. A keynote and function progression extractor determines a keynote and function of each chord in the chord progression from a chord progression input device in accordance with the function knowledge database. From the extractor's results a tonality data generator produces tonality data defining a pitch class set available in each chord time interval. The tonality determining apparatus is applied to an accompaniment apparatus for playing an accompaniment with a desired tonality.

REFERENCES:
patent: 4982643 (1991-01-01), Minamitaka
patent: 5003860 (1991-04-01), Minamitaka
patent: 5052267 (1999-10-01), Ino
patent: 5056401 (1991-10-01), Yamaguchi et al.
patent: 5088380 (1992-02-01), Minamitaka

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