GB1451019A - Dual vibrato system - Google Patents

Dual vibrato system

Info

Publication number
GB1451019A
GB1451019A GB3829674A GB3829674A GB1451019A GB 1451019 A GB1451019 A GB 1451019A GB 3829674 A GB3829674 A GB 3829674A GB 3829674 A GB3829674 A GB 3829674A GB 1451019 A GB1451019 A GB 1451019A
Authority
GB
United Kingdom
Prior art keywords
frequency
transistors
master
vibrato
sept
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3829674A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of GB1451019A publication Critical patent/GB1451019A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/043—Continuous modulation

Abstract

1451019 Electrophonic musical instument MOTOROLA Inc 2 Sept 1974 [4 Sept 1973] 38296/74 Heading G5J Two substantially similar oscillators 50, 70 are connected through a resistor 90 which synchronises the second to a multiple of the first frequency which is a sub-audio vibrato frequency, e.g. 6Hz. The combining circuit 100 comprising resistors 92, 94, 96 combines the signals to produce a low frequency, non- sinusoidal vibrato signal which is applied to the bases of transistors 16, 18 in the master oscillator 10, thereby periodically varying the capacitance of these transistors and modulating the master frequency. The position of the switch 40 in oscillator 10 determines whether the master frequency is to be governed by the crystal 38 (switch as shown) or by the capacitor 32. Each pair of transistors 12, 14 &c. may be replaced by a single transistor or the system may be fabricated using an integrated circuit having four dual input gates.
GB3829674A 1973-09-04 1974-09-02 Dual vibrato system Expired GB1451019A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00393762A US3854367A (en) 1973-09-04 1973-09-04 Dual vibrato system

Publications (1)

Publication Number Publication Date
GB1451019A true GB1451019A (en) 1976-09-29

Family

ID=23556141

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3829674A Expired GB1451019A (en) 1973-09-04 1974-09-02 Dual vibrato system

Country Status (4)

Country Link
US (1) US3854367A (en)
JP (1) JPS5056223A (en)
DE (1) DE2441642A1 (en)
GB (1) GB1451019A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165985A (en) * 1984-08-24 1986-04-23 Hayashibara Ken Apparatus for inducing frequency reduction in human brain waves

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52124319A (en) * 1976-04-12 1977-10-19 Hiruutsudo Gatsuki Seizou Kk Voltage controlled phase shifter circuit for electronic instrument

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2148478A (en) * 1936-05-08 1939-02-28 Baldwin Co Harmonic tone production for the generation of musical tone qualities
NL64746C (en) * 1943-01-15
US2859346A (en) * 1954-07-28 1958-11-04 Motorola Inc Crystal oscillator
US2827569A (en) * 1956-01-18 1958-03-18 Phillip L Jessen Stabilized oscillator
US2835870A (en) * 1956-09-18 1958-05-20 Ora G Fretz Tremolo-frequency modulator
US3257495A (en) * 1962-01-31 1966-06-21 Scope Inc Vibrato systems
US3490327A (en) * 1966-08-26 1970-01-20 Excelsior Accordians Inc Multivibrator frequency divider chain for musical instrument employing a master oscillator which is step frequency adjustable and a twin-t vibrato oscillator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2165985A (en) * 1984-08-24 1986-04-23 Hayashibara Ken Apparatus for inducing frequency reduction in human brain waves
US4834701A (en) * 1984-08-24 1989-05-30 Ken Hayashibara Apparatus for inducing frequency reduction in brain wave

Also Published As

Publication number Publication date
JPS5056223A (en) 1975-05-16
DE2441642A1 (en) 1975-03-27
US3854367A (en) 1974-12-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee