Electronic musical instrument providing chord tones in just into

Details Electronic musical instrument providing chord tones in just into Electronic musical instrument providing chord tones in just into

1979-11-09

1981-02-03

Witkowski, S. J.

Music

Instruments

84 103, 84DIG22, G10H 138, G10H 500

Patent

active

042481198

ABSTRACT:
An electronic musical instrument of a digital processing type comprises a first ROM storing frequency information corresponding to respective notes for producing tones with pitches of the equally tempered scale, a second ROM storing correction data for the frequency information to shift the pitch to bring to just intonation relationship, a chord detector for identifying the root note, and a pitch adjusting circuit for modifying the frequency information of the chord constituent notes other than the root note in accordance with the correction data read out from the second ROM.
Thus the tones are produced in just intonation relationship when they constitute a chord and otherwise in a normal equally tempered scale.

REFERENCES:
patent: 3809786 (1974-05-01), Deutsch
patent: 3882751 (1975-05-01), Tomisawa et al.
patent: 4114495 (1978-09-01), Tomisawa
patent: 4148017 (1979-04-01), Tomisawa
patent: 4216692 (1980-08-01), Okuyama et al.

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