Music – Instruments – Electrical musical tone generation
Patent
1992-08-27
1993-12-07
Witkowski, Stanley J.
Music
Instruments
Electrical musical tone generation
84663, 84694, 84477R, 84DIG27, G09B 1504, G10H 1057, G10H 114
Patent
active
052685284
ABSTRACT:
A musical sound waveform generator includes a carrier signal generating unit, a modulation signal generating unit, a mixing controlling unit and a waveform outputting unit. The characteristics of the carrier signal from the carrier signal generating unit are determined such that the musical sound waveform generated by the waveform outputting unit is a sine wave or a cosine wave with a single frequency, where the mixing ratio of the modulation signal is made O by the mixing controlling unit. Therefore, the mixing controlling unit presets the mixing ratio of the modulation signal to be O, making it possible to generate a musical sound waveform which is only a sine wave or a cosine wave of a single frequency. During the performance, the mixing ratio can, for example, be determined at a high value immediately after the start of sound generation and thereafter reduced to near O with time. Thereby, the frequency characteristics of the musical sound waveform can be controlled such that the musical sound waveform is changed from one having a lot of higher harmonics to one having only a single sine wave component or a single cosine wave component.
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patent: 4924744 (1990-05-01), Yamamura
Casio Computer Co. Ltd.
Witkowski Stanley J.
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