Music – Instruments
Patent
1975-11-21
1977-01-04
Jackmon, E. S.
Music
Instruments
84 103, 84 126, G10H 100, G10F 100, G10H 102
Patent
active
040006751
ABSTRACT:
An electronic muscial instrument capable of calculating level information of slope portion of a filter characteristic on the basis of the inclination of the slope and the cut-off frequency without requirement of storing level information of the slope portion for each individual frequency.
The inventive electronic musical instrument is also capable of obtaining level information of an acute portion of filter characteristic which constitutes selectivity Q by calculating the inclination and peak value of the acute portion and difference between the peak frequency and the cut-off frequency.
An example is shown in which the cut-off frequency is caused to successively change during a period of time from the start to the end of playing of a musical tone and in which the peak of the selectivity Q can be directed either upward or downward as desired.
REFERENCES:
patent: 3809786 (1974-05-01), Deutsch
patent: 3823390 (1974-07-01), Tomisana et al.
Chibana Masanobu
Futamase Tsuyoshi
Jackmon E. S.
Nippon Gakki Seizo Kabushiki Kaisha
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