Music – Instruments – Electrical musical tone generation
Patent
1989-11-27
1991-12-10
Shoop, Jr., William M.
Music
Instruments
Electrical musical tone generation
84625, 84660, G10H 504, G10H 502
Patent
active
050707574
ABSTRACT:
An electronic tone generator in which a plurality of types of scale data and tone-length data are stored in an associative arrangement at predetermined addresses in a single storage device. The plurality of types of scale data read from the single storage device are input to corresponding waveform generators, where melody-waveform signals are generated. The melody-waveform signals generated in the respective waveform generators are mixed and synthesized by a mixer before being output from an output device. The waveform generators are adapted to switch envelope waveforms generated by envelope-waveform generators of a digital circuit configuration with waveform signals corresponding to the scale data, thereby obtaining melody-waveform signals. One of the waveform generators is adapted to generate a melody-waveform signal having a frequency which is an integral multiplication of the frequency of a main melody, for example, three times the frequency thereof, or to generate a melody-waveform signal giving a tremolo effect. To this electronic tone generator can be added a waveform generator for generating a percussion-waveform signal; the melody-waveform signals can be mixed and synthesized with the percussion-waveform signal, which makes it possible to output a melody with an accompaniment.
REFERENCES:
patent: 4186642 (1980-02-01), Gross
patent: 4273019 (1981-06-01), Goto
patent: 4554855 (1985-11-01), Alonso et al.
patent: 4630518 (1986-12-01), Usami
patent: 4641563 (1987-02-01), Nagashima
patent: 4651612 (1987-03-01), Matsumoto
patent: 4934239 (1990-06-01), Tsai
SC HighTech Center Corp.
Shoop Jr. William M.
Sircus Brian
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