Electronic music system producing vibrato and tremolo effects
First Claim
1. An electronic music system adapted to generate tones of different pitch, amplitude and duration which, when reproduced, create musical sounds that emulate those produced by acoustic instruments, said system comprising:
- A. a tone generator producing a sonic wave having a carrier of a predetermined frequency;
B. means to generate an asymmetrical wave composed of a low-frequency sinusoidal wave having a predetermined amplitude and a frequency in a range producing a vibrato, said sinusoidal wave having superimposed thereon a secondary wave of low amplitude relative to that of the sinusoidal wave and having a frequency which is a second harmonic of the sinusoidal wave to impose a stepped staircase formation on the curvature of the sinusoidal wave; and
C. means to frequency-modulate the sonic wave with said asymmetrical wave to periodically vary the frequency of the carrier above and below said predetermined frequency to impart vibrato to the resultant musical sound.
0 Assignments
0 Petitions
Accused Products
Abstract
An electronic music system adapted to generate tone waves of different pitch, amplitude and duration which, when reproduced, create musical tones whose expressive qualities emulate the expressive quality of natural tones producible by acoustic instruments or the human voice. The system includes a tone wave generator, the carrier of which is frequency modulated by an asymmetrical wave whose major component is a sinusoidal wave and whose minor component superimposed on the sinusoidal wave is the second harmonic of that wave. The frequency of the sinusoidal wave is such that as the carrier is frequency-modulated, its frequency is periodically varied above and below its normal value so that the resultant tone exhibits a vibrato effect. And the carrier is at the same time amplitude modulated so that it is periodically varied in amplitude to impart to the resultant tone a tremolo effect whereby the tone yielded by the system emulates a natural tone. The rise and fall time of the vibrato on the tones is variable and related to the musical structure.
-
Citations
13 Claims
-
1. An electronic music system adapted to generate tones of different pitch, amplitude and duration which, when reproduced, create musical sounds that emulate those produced by acoustic instruments, said system comprising:
-
A. a tone generator producing a sonic wave having a carrier of a predetermined frequency; B. means to generate an asymmetrical wave composed of a low-frequency sinusoidal wave having a predetermined amplitude and a frequency in a range producing a vibrato, said sinusoidal wave having superimposed thereon a secondary wave of low amplitude relative to that of the sinusoidal wave and having a frequency which is a second harmonic of the sinusoidal wave to impose a stepped staircase formation on the curvature of the sinusoidal wave; and C. means to frequency-modulate the sonic wave with said asymmetrical wave to periodically vary the frequency of the carrier above and below said predetermined frequency to impart vibrato to the resultant musical sound. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
Specification