US3603714A
Expired / Lapsed
US
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Method and system for generating tremolo effects in electronic musical instruments
Assignee: Nippon Gakki Co Ltd
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Filing: 1969-10-01
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Granted: 1971-09-07
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Expires: 1989-10-01
Abstract
Abstract In an electronic organ having plain keys, tremolo effects or mandolin effects are obtained by a system which comprises a pulse-generating circuit of such construction as to detect lateral movements of the playing keys and produce a detected signal in accordance with the lateral movement, which pulse generating circuit further frequency-multiplies the detected signal and shapes the frequency-multiplied signal into a pulse, which circuit further includes a conversion circuit wherein the waveform of the pulse is converted into a desired form, and an amplitude-modulation circuit wherein the amplitude of a musical signal delivered by the manipulation of the playing keys is modulated in accordance with the waveformed pulse. With this system, tremolo effects or mandolin effects are obtained by the lateral manipulation of the playing keys.
Inventors
- 👤 Takeshi Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:47
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A method of generating tremolo effects in an electronic musical instrument having keys which key musical sounds when manipulated, said method comprising the steps of generating an electric signal by lateral movement of each of said keys, and applying said signal to a pulse-generating circuit, converting the waveform of the resulting output signal from said pulsegenerating circuit, and amplitude-modulating a musical sound signal with the thus converted output signal.
Claim 2
Independent Claim
69 words
A method of generating tremolo effects in an electronic musical instrument having keys which key musical sounds when manipulated, said method comprising the steps of generating an electric signal by lateral movement of each of said keys, and applying said signal to a pulse-generating circuit, converting the waveform of the resulting output signal from said pulsegenerating circuit, and amplitude-modulating a musical sound signal with the thus converted output signal.
Claim 3
Independent Claim
88 words
A system for generating tremolo effects in an electronic musical instrument having keys which key musical sounds when actuated, said system comprising a pulse-generating circuit including means generating an electric signal by lateral movement of each of said keys, a conversion circuit means wherein the waveform of the resulting generated output signal from said pulse-generating circuit is converted to a desired form, and an amplitude-modulation circuit means wherein the amplitude of a musical sound signal is modulated in accordance with the resulting output of said waveform conversion circuit.
Claim 4
Independent Claim
88 words
A system for generating tremolo effects in an electronic musical instrument having keys which key musical sounds when actuated, said system comprising a pulse-generating circuit including means generating an electric signal by lateral movement of each of said keys, a conversion circuit means wherein the waveform of the resulting generated output signal from said pulse-generating circuit is converted to a desired form, and an amplitude-modulation circuit means wherein the amplitude of a musical sound signal is modulated in accordance with the resulting output of said waveform conversion circuit.
Claim 5
Independent Claim
99 words
A system for generating tremolo effects in an electronic musical instrument having keys, comprising a pulse generating circuit to which an electric signal created by lateral movement of each of said keys is applied, a conversion circuit for converting the wave form of the resulting output signal from said pulse generating circuit to a desired form, an amplitude-modulation circuit for modulating the amplitude of a musical sound signal in accordance with the resulting output of said waveform conversion circuit, and a reCtifying circuit for rectifying said musical signal and applying the thus rectified output to said pulse generating circuit.
Claim 6
Independent Claim
99 words
A system for generating tremolo effects in an electronic musical instrument having keys, comprising a pulse generating circuit to which an electric signal created by lateral movement of each of said keys is applied, a conversion circuit for converting the wave form of the resulting output signal from said pulse generating circuit to a desired form, an amplitude-modulation circuit for modulating the amplitude of a musical sound signal in accordance with the resulting output of said waveform conversion circuit, and a reCtifying circuit for rectifying said musical signal and applying the thus rectified output to said pulse generating circuit.
Claim 7
Independent Claim
64 words
A method of generating tremolo effects in an electronic musical instrument having keys for keying musical sounds when actuated, said method comprising the steps of generating an electric signal by lateral movement of each of the keys, frequency-multiplying the generated electric signal, shaping the multiplied signal, converting the waveform of the resulting shaped signal, and amplitude-modulating a musical sound signal with the converted signal.
Claim 8
Independent Claim
64 words
A method of generating tremolo effects in an electronic musical instrument having keys for keying musical sounds when actuated, said method comprising the steps of generating an electric signal by lateral movement of each of the keys, frequency-multiplying the generated electric signal, shaping the multiplied signal, converting the waveform of the resulting shaped signal, and amplitude-modulating a musical sound signal with the converted signal.
Claim 9
Dependent Claim
19 words
A method as claimed in claim 4, wherein said generated electric signal is multiplied by a factor of 2.
Claim 10
Dependent Claim
19 words
A method as claimed in claim 4, wherein said generated electric signal is multiplied by a factor of 4.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |