GB1303867A - - Google Patents

Info

Publication number
GB1303867A
GB1303867A GB1526370A GB1526370A GB1303867A GB 1303867 A GB1303867 A GB 1303867A GB 1526370 A GB1526370 A GB 1526370A GB 1526370 A GB1526370 A GB 1526370A GB 1303867 A GB1303867 A GB 1303867A
Authority
GB
United Kingdom
Prior art keywords
frequency
variable
signals
modulation
phase
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
GB1526370A
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 filed Critical
Publication of GB1303867A publication Critical patent/GB1303867A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC 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
    • G10H1/00Details of electrophonic musical instruments
    • G10H1/02Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/043Continuous modulation
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC 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
    • G10H1/00Details of electrophonic musical instruments
    • G10H1/02Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC 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
    • G10H2210/00Aspects 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
    • G10H2210/155Musical effects
    • G10H2210/195Modulation 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 or playback speed
    • G10H2210/201Vibrato, i.e. rapid, repetitive and smooth variation of amplitude, pitch or timbre within a note or chord
    • G10H2210/211Pitch vibrato, i.e. repetitive and smooth variation in pitch, e.g. as obtainable with a whammy bar or tremolo arm on a guitar

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Stereophonic System (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Networks Using Active Elements (AREA)

Abstract

1303867 Processing audio frequency signals MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 31 March 1970 [27 March 1969] 15263/70 Heading G5J [Also in Divisions H3 and H4] Audio frequency signals, e.g. tone signals in an electronic musical instrument are separated into frequency bands and the higher frequency bands are phase modulated at a sub-audio frequency before being recombined to provide vibrato without undesirable beats in the bass. Alternatively, amplitude modulation may be used. The separated signals in each of the higher frequency bands on leads 82, 83 are separated by coupling means 120, 121 which may be direct connections and modulated with modulation depth increasing with frequency in modulators 122-125 provided with modulating voltages of different phases and frequencies which increase with the input frequency, possibly stepwise. The signals pass via amplifiers 131-136 to speakers 141-146 and/or to a single amplifier 137 and speaker 147 and their combined effect is to produce a vibrato in frequency and amplitude. The input may be connected to an electronic musical instrument or a tape or disc recording. The modulation depth, or modulation frequency versus input frequency curves may be stepped or continuous, Figs. 2, 3 (not shown). The modulators (122- 123), Fig. 4 (not shown), provide signals modulated in opposite phase which are fed to speakers (148; 149) respectively, the speakers also receiving signals from lead (81). In Fig. 6 (not shown), only one modulator (122) is provided, and its output is mixed with an unmodulated signal of the same frequency both of which are fed to speaker (147). The modulators may be delay lines of variable delay characteristics giving a phase deviation characteristic shown in Fig. 9 (not shown) or a transistor may have equal emitter and collector resistors, connected to an output (330), Fig. 12 (not shown), via a variable resistance, and a variable capacitance, respectively, modulation being obtained by varying either the capacity or resistance at modulating frequency, giving the deviation characteristic shown in Fig. 11 a valve, or FET or transformer may be used instead of a transistor, and a variable inductance may be used to obtain modulation. A number of such circuits may be connected in cascade, Fig. 15 (not shown), to increase either the maximum phase deviation, Fig. 17 (not shown), or increase the frequency range over which the deviation is substantial, Fig. 20 (not shown), by suitable choice of time constant of the variable network in each circuit. Variable resistors R, Fig. 12 (not shown), R 1 , R 2 , R 3 , Fig. 15 (not shown), may utilize the Hall effect, or be light sensitive for example made of CdS or CdSe, and illuminated by a lamp supplied with alternating current at modulation frequency, and variable phase, superposed on a direct current to set the mean value of resistance, Fig. 14 (not shown).
GB1526370A 1969-03-27 1970-03-31 Expired GB1303867A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2371969A JPS5524116B1 (en) 1969-03-27 1969-03-27

Publications (1)

Publication Number Publication Date
GB1303867A true GB1303867A (en) 1973-01-24

Family

ID=12118122

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1526370A Expired GB1303867A (en) 1969-03-27 1970-03-31

Country Status (6)

Country Link
JP (1) JPS5524116B1 (en)
DE (1) DE2015500C3 (en)
FR (1) FR2035936A1 (en)
GB (1) GB1303867A (en)
NL (1) NL7004213A (en)
ZA (1) ZA702084B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3718871A (en) * 1970-07-29 1973-02-27 Matsushita Electric Ind Co Ltd Phase modulating device
CN113325657B (en) * 2021-08-03 2021-11-30 杭州中科极光科技有限公司 Projection system, projection display method and terminal equipment

Also Published As

Publication number Publication date
JPS5524116B1 (en) 1980-06-26
FR2035936A1 (en) 1970-12-24
ZA702084B (en) 1971-01-27
DE2015500A1 (en) 1970-12-23
DE2015500B2 (en) 1973-10-25
NL7004213A (en) 1970-09-29
DE2015500C3 (en) 1974-06-20

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years