Music – Instruments
Patent
1982-04-21
1983-11-22
Isen, F. W.
Music
Instruments
84 101, 84DIG9, 364724, G10H 102
Patent
active
044161794
ABSTRACT:
An electronic musical instrument comprising a tone generator, an accumulator and a digital filter. The tone generator generates musical tone signals each represented by sampled values, corresponding to depressed keys. The accumulator accumulates the sampled values of the musical tone signals at predetermined timings. The digital filter modifies an output of the accumulator in accordance with the amplitude-frequency characteristic of a predetermined formant characteristic. A musical tone is produced based on an output of the digital filter circuit, thereby the formant characteristic is imparted to the musical tone.
This utilization of the digital filter for the musical instrument makes it possible to impart a formant characteristic to a musical tone without a complex circuit construction. Moreover the insertion of the accumulator following the tone generator makes it possible to use the digital filter of a low speed type.
REFERENCES:
patent: 3956960 (1976-05-01), Deutsch
patent: 4018121 (1977-04-01), Chowning
patent: 4085644 (1978-04-01), Deutsch et al.
patent: 4101964 (1978-07-01), Betts
patent: 4175464 (1979-11-01), Deutsch
patent: 4192210 (1980-03-01), Deutsch
patent: 4211138 (1980-07-01), Deutsch
patent: 4258602 (1981-03-01), Niimi
patent: 4267761 (1981-05-01), Deutsch
patent: 4300434 (1981-11-01), Deutsch
patent: 4301704 (1981-11-01), Ragai
patent: 4351218 (1982-09-01), Deutsch
"High Quality Parcor Speech Synthesizer" by Sampei Asada et al., IEEE Transactions on Consumer Electronics, vol. CE-26, Aug. 1980.
Isen F. W.
Nippon Gakki Seizo Kabushiki Kaisha
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