GB1417254A - Phase shift tremulant system - Google Patents

Phase shift tremulant system

Info

Publication number
GB1417254A
GB1417254A GB1836873A GB1836873A GB1417254A GB 1417254 A GB1417254 A GB 1417254A GB 1836873 A GB1836873 A GB 1836873A GB 1836873 A GB1836873 A GB 1836873A GB 1417254 A GB1417254 A GB 1417254A
Authority
GB
United Kingdom
Prior art keywords
phase
tremulant
solo
tibia
feeds
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
GB1836873A
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.)
WARWICK ELECTRONIC Inc
Original Assignee
WARWICK ELECTRONIC 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 WARWICK ELECTRONIC Inc filed Critical WARWICK ELECTRONIC Inc
Publication of GB1417254A publication Critical patent/GB1417254A/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
    • 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
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/155—Musical effects
    • G10H2210/195—Modulation effects, i.e. smooth non-discontinuous variations over a time interval, e.g. within a note, melody or musical transition, of any sound parameter, e.g. amplitude, pitch, spectral response, playback speed
    • G10H2210/201—Vibrato, i.e. rapid, repetitive and smooth variation of amplitude, pitch or timbre within a note or chord
    • G10H2210/205—Amplitude vibrato, i.e. repetitive smooth loudness variation without pitch change or rapid repetition of the same note, bisbigliando, amplitude tremolo, tremulants
    • 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
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/155—Musical effects
    • G10H2210/195—Modulation effects, i.e. smooth non-discontinuous variations over a time interval, e.g. within a note, melody or musical transition, of any sound parameter, e.g. amplitude, pitch, spectral response, playback speed
    • G10H2210/201—Vibrato, i.e. rapid, repetitive and smooth variation of amplitude, pitch or timbre within a note or chord
    • G10H2210/211—Pitch vibrato, i.e. repetitive and smooth variation in pitch, e.g. as obtainable with a whammy bar or tremolo arm on a guitar
    • 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
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/155—Musical effects
    • G10H2210/195—Modulation effects, i.e. smooth non-discontinuous variations over a time interval, e.g. within a note, melody or musical transition, of any sound parameter, e.g. amplitude, pitch, spectral response, playback speed
    • G10H2210/201—Vibrato, i.e. rapid, repetitive and smooth variation of amplitude, pitch or timbre within a note or chord
    • G10H2210/215—Rotating vibrato, i.e. simulating rotating speakers, e.g. Leslie effect
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S84/00—Music
    • Y10S84/01—Plural speakers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

1417254 Electrophonic musical instrument WARWICK ELECTRONICS Inc 17 April 1973 [17 April 1972] 18368/73 Heading G5J To produce tremulant effect in an electronic organ having separate left and right speaker channels 66, 72, phase shift is introduced into each channel at 6À7 Hz, the absolute and relative phase swings between channels depending on the organ voice in use. Sixty square waves, covering each semitone over five octaves, are supplied, 20, from twelve master sources by frequency division, to keying switches 24, 26, 28 on solo, accompaniment and pedal keyboards. Voicing circuits 34 on the solo board give choice of tibia, violin or complex voices; these and the other two keyboard voiced outputs 36, 38 are treated separately. Pedal output always feeds to a non- tremulant amplifier 62 and thence equally to the speaker channels; accompaniment and solo tibia and complex do likewise if their tremulant switches 60 are off; violin if its switch 60 is off feeds the left channel only. When tremulant is required solo complex voice feeds left and right channels via separate phase-shifters 80, 78 with phase inversion 100 in one channel; accompaniment omits inversion, solo tibia also omits inversion and enters phase shifters at an earlier stage to increase shift, and violin feeds only the phase shifter on the left channel. Each phase shifter comprises two units in cascade, entered by tibia voice signal before the first unit, by other voices before the second unit. Each unit comprises two phase-shifting stages, each followed by an impedance reducing transistor. Each stage output is taken from the junction of an inductor and light sensitive resistor fed in series between direct and inverted signal potentials on the emitter and collector of a basefed transistor. The inductors are modified by capacitors to reverse the direction of phase shift -below a critical frequency, being 84, 42, 190, 84 Hz in successive stages, so tending to equalize the percentage frequency swing on low and high notes, summed over all stages used. Maximum phase shift is approximately 177¢ degrees per stage or 710 degrees in the complete phase shifter; the shift depends on the intensity of light from a lamp lighting all four resistors. Right and left channel phase shifters are identical and both lamps are driven, 92, 96, from the same 6À7 Hz oscillator 90 supplying zero based square wave; however the right lamp waveform is modified to be double peaked 94. All these arrangements are stated to be found empirically to improve the musical tremulant effect.
GB1836873A 1972-04-17 1973-04-17 Phase shift tremulant system Expired GB1417254A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24457372A 1972-04-17 1972-04-17

Publications (1)

Publication Number Publication Date
GB1417254A true GB1417254A (en) 1975-12-10

Family

ID=22923311

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1836873A Expired GB1417254A (en) 1972-04-17 1973-04-17 Phase shift tremulant system

Country Status (6)

Country Link
US (1) US3778525A (en)
AU (1) AU474600B2 (en)
DE (1) DE2319520A1 (en)
GB (1) GB1417254A (en)
IT (1) IT980231B (en)
NL (1) NL7305293A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5225619A (en) * 1990-11-09 1993-07-06 Rodgers Instrument Corporation Method and apparatus for randomly reading waveform segments from a memory
US6259006B1 (en) * 1996-08-30 2001-07-10 Raoul Parienti Portable foldable electronic piano
JP2008262021A (en) * 2007-04-12 2008-10-30 Hiromi Murakami Phase switching device in electric musical instrument
US20110317841A1 (en) * 2010-06-25 2011-12-29 Lloyd Trammell Method and device for optimizing audio quality

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2892372A (en) * 1953-07-16 1959-06-30 Wurlitzer Co Organ tremulant
US2892373A (en) * 1955-05-19 1959-06-30 Wurlitzer Co Multiple tremulant for treble tones in electronic musical instruments
US3004459A (en) * 1956-12-31 1961-10-17 Baldwin Piano Co Modulation system
US3007361A (en) * 1956-12-31 1961-11-07 Baldwin Piano Co Multiple vibrato system
US3004460A (en) * 1956-12-31 1961-10-17 Baldwin Piano Co Audio modulation system
US3160695A (en) * 1959-03-02 1964-12-08 Don L Bonham Electrical music system
US3336432A (en) * 1964-03-04 1967-08-15 Hurvitz Hyman Tone generator with directivity cues
US3418418A (en) * 1964-05-25 1968-12-24 Wilder Dallas Richard Phase shift vibrato circuit using light dependent resistors and an indicating lamp
US3398230A (en) * 1965-01-13 1968-08-20 Seeburg Corp Sequential connction of speakers for moving sound source simulation or the like
US3388257A (en) * 1965-01-14 1968-06-11 Ampeg Company Inc System for introducing tremolo and vibrato into audio frequency signals
US3378623A (en) * 1965-05-07 1968-04-16 Seeburg Corp Tremolo-vibrato circuitry for use with a simulated moving sound source or the like
US3524376A (en) * 1965-10-20 1970-08-18 Solomon Heytow Vibrato circuit utilizing light-sensitive resistors and organ embodying same
US3516318A (en) * 1968-01-02 1970-06-23 Baldwin Co D H Frequency changer employing opto-electronics
US3609204A (en) * 1969-10-06 1971-09-28 Richard H Peterson Vibrato system for electrical musical instrument
US3644657A (en) * 1969-10-20 1972-02-22 Francis A Miller Electronic audiofrequency modulation system and method
US3609205A (en) * 1970-05-15 1971-09-28 Wurtilzer Co The Electronic musical instrument with phase shift vibrato

Also Published As

Publication number Publication date
IT980231B (en) 1974-09-30
AU5427673A (en) 1974-10-10
DE2319520A1 (en) 1973-10-31
US3778525A (en) 1973-12-11
NL7305293A (en) 1973-10-19
AU474600B2 (en) 1976-07-29

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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