Patent US3835236A successfully refreshed from Google Patents.
US3835236A
Expired / Lapsed
US
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Apparatus for producing base tones in an electronic musical instrument
Assignee: Nippon Gakki Co Ltd
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Filing: 1973-08-29
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Granted: 1974-09-10
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Expires: 1993-08-29
Abstract
Abstract An apparatus for producing base tones in an electronic musical instrument adapted to produce base tones by successively frequency dividing a base tone signal selected by a single tone selection circuit by 1/2 frequency dividers to obtain a plurality of foot-register signals and providing these footregister signals with desired envelope and tone-color. The base tone to be obtained is provided with a ''''sway'''' effect either by phase-modulating a base tone signal by a modulating signal of about 1 Hz, by phase-modulating each foot-register signal in the same phase or in different phases by a modulating signal of about 1 Hz, or by phase-modulating the output signal of a tone-color circuit by a modulating signal of about 1 Hz. In one form of the inventive apparatus, the base tone signal is fed to two separate systems. In this case, the phase modulation is carried out in one of the systems and not in the other. The phase modulation may also be carried out in both systems in which case modulating signals differing in phase by 180* from each other are used for the phase modulation.
Inventors
- 👤 T Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:18
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/043
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
106 words
An apparatus for producing base tones in an electronic musical instrument comprising a latching selector for selecting a single tone signal corresponding to a depressed pedal and memorizing its selection until a next pedal is depressed, phase modulation means for applying phase modulation to the base tone signal selected by said latching selector by a modulating signal of about 1 Hz, first frequency dividing means for successively frequency dividing the output of said phase modulation means by two to produce a plurality of foot-register signals and first tone keyers for providing each of said foot-register signals with an envelope in accordance with operation of the pedal.
Claim 2
Independent Claim
106 words
An apparatus for producing base tones in an electronic musical instrument comprising a latching selector for selecting a single tone signal corresponding to a depressed pedal and memorizing its selection until a next pedal is depressed, phase modulation means for applying phase modulation to the base tone signal selected by said latching selector by a modulating signal of about 1 Hz, first frequency dividing means for successively frequency dividing the output of said phase modulation means by two to produce a plurality of foot-register signals and first tone keyers for providing each of said foot-register signals with an envelope in accordance with operation of the pedal.
Claim 3
Dependent Claim
81 words
An apparatus for producing base tones in an electronic musical instrument as defined in claim 1 in which said phase modulation means comprise an oscillator producing a modulating signal of about 1 Hz, a low-pass filter for filtering said base tone signal, a phase signal circuit which produces phase shift in the base tone signal filtered through said low-pass filter by the modulating signal from said oscillator and a Schmitt trigger circuit which converts the phase-shifted signal to a square wave.
Claim 4
Dependent Claim
62 words
An apparatus for producing base tones in an electronic musical instrument as defined in claim 1 which further comprises second frequency dividing means for successively and directly frequency dividing said base tone signal by two and second tone keyers for providing each of the foot-register signals from said second frequency dividing means with an envelope in accordance with operation of the pedal.
Claim 5
Dependent Claim
39 words
An apparatus for producing base tones in an electronic musical instrument as defined in claim 3 which further comprises a tone-color imparting circuit which provides all the outputs of said first and second tone keyers with a predetermined tone-color.
Claim 6
Dependent Claim
41 words
An apparatus for producing base tones in an electronic musical instrument as defined in claim 3 which further comprises tone-color imparting circuits each providing the corresponding one of the outputs of said first and second tone keyers with a predetermined tone-color.
Claim 7
Dependent Claim
37 words
An apparatus for producing base tones in an electronic musical instrument as defIned in claim 3 in which said first tone keyers have a sustain envelope characteristic and said second tone keyers have a percussive envelope characteristic.
Claim 8
Dependent Claim
53 words
An apparatus for producing base tones in an electronic musical instrument as defined in claim 3 in which said first and second tone keyers respectively produce at least one foot-register signal which is different from each other and which further comprises a plurality of tone-color imparting circuits providing the signals with predetermined tone-colors.
Claim 9
Dependent Claim
109 words
An apparatus for producing base tones in an electronic musical instrument as defined in claim 1 which further comprises second phase modulation means which applies phase modulation of about 1 Hz to said base tone signal, frequency dividing means for frequency dividing the output of said second phase modulation means by two to produce a plurality of foot-register signals and tone keyers for providing the outputs of said frequency dividing means with an envelope in accordance with operation of the pedal, said first phase modulation means and said second phase modulation means carry out the phase modulation by modulating signals which differ in phase by 180* from each other.
Claim 10
Independent Claim
132 words
An apparatus for producing base tones in an electronic musical instrument comprising a latching selector for selecting a single tone signal corresponding to a depressed pedal and keeping its selection until a next pedal is depressed, frequency dividing means for successively frequency dividing the base tone signal selected by said latching selector by two to produce a plurality of foot-register signals, first tone keyers for directly providing the respective signals with an envelope in accordance with operation of the pedals, phase modulation circuit means for applying phase modulation of about 1 Hz to each of the foot-register signals, second tone keyers for providing the outputs of said phase modulation circuit means with an envelope and tone-color imparting means for providing the outputs of said first and second tone keyers with a tone-color.
Claim 11
Independent Claim
132 words
An apparatus for producing base tones in an electronic musical instrument comprising a latching selector for selecting a single tone signal corresponding to a depressed pedal and keeping its selection until a next pedal is depressed, frequency dividing means for successively frequency dividing the base tone signal selected by said latching selector by two to produce a plurality of foot-register signals, first tone keyers for directly providing the respective signals with an envelope in accordance with operation of the pedals, phase modulation circuit means for applying phase modulation of about 1 Hz to each of the foot-register signals, second tone keyers for providing the outputs of said phase modulation circuit means with an envelope and tone-color imparting means for providing the outputs of said first and second tone keyers with a tone-color.
Claim 12
Dependent Claim
35 words
An apparatus for producing base tones in an electronic musical instrument as defined in claim 9 in which said phase modulation circuit means apply phase modulation of the same phase to the respective foot-register signals.
Claim 13
Dependent Claim
34 words
An apparatus for producing base tones in an electronic musical instrument as defined in claim 9 in which said phase modulation circuit means apply phase modulation of different phases to the respective foot-register signals.
Claim 14
Independent Claim
115 words
An apparatus for producing base tones in an electronic musical instrument comprising a latching selector for selecting a single tone signal corresponding to a depressed pedal and keeping its selection until a next pedal is depressed, frequency dividing means for successively frequency dividing the base tone signal selected by said latching selector by two to produce a plurality of foot-register signals, tone keyers for providing the respective foot-register signals with an envelope in accordance with operation of the pedals, tone-color imparting means for providing the outputs of said tone keyers with a tone-color, and phase modulation circuit means for applying phase modulation of about 1 Hz to the output signal of said tone-color imparting means.
Claim 15
Independent Claim
115 words
An apparatus for producing base tones in an electronic musical instrument comprising a latching selector for selecting a single tone signal corresponding to a depressed pedal and keeping its selection until a next pedal is depressed, frequency dividing means for successively frequency dividing the base tone signal selected by said latching selector by two to produce a plurality of foot-register signals, tone keyers for providing the respective foot-register signals with an envelope in accordance with operation of the pedals, tone-color imparting means for providing the outputs of said tone keyers with a tone-color, and phase modulation circuit means for applying phase modulation of about 1 Hz to the output signal of said tone-color imparting means.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |