US3629484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tremolo effect producing device
Assignee: Nippon Gakki Co Ltd
•
Filing: 1970-12-28
•
Granted: 1971-12-21
•
Expires: 1990-12-28
Abstract
Abstract A carrier wave having a subaudible frequency is modulated in amplitude by a modulating wave of a tone signal having an audible frequency, which produces a resultant modulated output signal having first and second side band components respectively deviated above and below the tone signal frequency by a deviation equal to the carrier frequency. The frequency of the carrier wave is selected to be much lower than that of the modulating wave, contrary to the known conventional modulation technique. The frequency-deviated signal thus obtained is admixed with the original nonfrequency-deviated musical sound signal thereby to produce a tremolo or chorus effect. The carrier wave is given a distorted waveform in order to produce a richer and more complicated tremolo or chorus effect.
Inventors
- 👤 Shoichi Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:16
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/043
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A tremolo effect producing device comprising an extremely low-frequency oscillator which generates an extremely lowfrequency signal having a distorted waveform and much lower frequency than the frequency of a musical sound signal; a modulator which modulates the extremely low-frequency signal produced from said extremely low-frequency oscillator by said musical sound signal, a filter means to remove extremely low frequencies from the output of said modulator, and a mixer which is adapted to mix at a desired mixing ratio said musical sound signal and the signal left after removing said extremely lowfrequency signal component from the output signal of said modulator.
Claim 2
Dependent Claim
100 words
A tremolo effect producing device comprising an extremely low-frequency oscillator which generates an extremely lowfrequency signal having a distorted waveform and much lower frequency than the frequency of a musical sound signal; a modulator which modulates the extremely low-frequency signal produced from said extremely low-frequency oscillator by said musical sound signal, a filter means to remove extremely low frequencies from the output of said modulator, and a mixer which is adapted to mix at a desired mixing ratio said musical sound signal and the signal left after removing said extremely lowfrequency signal component from the output signal of said modulator.
Claim 3
Dependent Claim
102 words
A tremolo effect producing device comprising a plurality of extremely low-frequency oscillators which produce extremely low-frequency signAls the frequencies of which are sufficiently lower than the frequency of a musical sound signal and are not in integral multiple relationship with one another; a modulator which amplitude-modulates a signal obtained by mixing said extremely low-frequency signals, by said musical sound signal; a filter means to remove extremely low frequencies from the output of said modulator, and a mixing circuit which is adapted to mix a signal left by removing only the extremely low-frequency signal component from the modulation output signal of said modulator.
Claim 4
Dependent Claim
102 words
A tremolo effect producing device comprising a plurality of extremely low-frequency oscillators which produce extremely low-frequency signAls the frequencies of which are sufficiently lower than the frequency of a musical sound signal and are not in integral multiple relationship with one another; a modulator which amplitude-modulates a signal obtained by mixing said extremely low-frequency signals, by said musical sound signal; a filter means to remove extremely low frequencies from the output of said modulator, and a mixing circuit which is adapted to mix a signal left by removing only the extremely low-frequency signal component from the modulation output signal of said modulator.
Claim 5
Dependent Claim
26 words
A tremolo effect producing device according to claim 1, wherein said extremely low-frequency oscillator is a band noise generator in the region of extremely low frequencies.
References Cited (Backward Citations)
US2835814A
Cited
US2835870A
Cited
US3267196A
Cited
US3329761A
Cited
US3490069A
Cited
US3510567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |