Automatic chord accompaniment for a guitar

Details Automatic chord accompaniment for a guitar Automatic chord accompaniment for a guitar

1979-10-29

1981-10-20

Truhe, J. V.

Music

Instruments

84 116, 84 124, 84DIG30, 84DIG22, G10F 100

Patent

active

042954029

ABSTRACT:
In an electrical tone generator apparatus is provided for automatically selecting one of a library of chord types which is closest to a chord fingered on a fretted string instrument. The closest decision is made by processing the fingered fret input data by a set of matched filters each of which corresponds to a member of the library of chord types. The chord type decision is made to correspond to the matched filter producing the maximum output response. The selection between chord types yielding equal responses is resolved by priority logic based upon the frequency of chord usage. A root note is chosen for each chord type. Note keying data is generated from the selected chord types which is transposed to the correct musical pitches in response to the chosen root note. The note keying data is grated by an automatic rhythm generator and the output is used to actuate electronic musical tone generators.

REFERENCES:
patent: 2792738 (1957-05-01), Donahue
patent: 3662641 (1972-05-01), Allen et al.
patent: 3786167 (1974-01-01), Borell et al.
patent: 3871247 (1975-03-01), Bonham
patent: 3967520 (1976-07-01), Drydyk
patent: 4142433 (1979-03-01), Gross
patent: 4144788 (1979-03-01), Bione et al.

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