GB1470457A - Signal circuits - Google Patents

Signal circuits

Info

Publication number
GB1470457A
GB1470457A GB2800274A GB2800274A GB1470457A GB 1470457 A GB1470457 A GB 1470457A GB 2800274 A GB2800274 A GB 2800274A GB 2800274 A GB2800274 A GB 2800274A GB 1470457 A GB1470457 A GB 1470457A
Authority
GB
United Kingdom
Prior art keywords
frequency
envelope
counter
fundamental frequency
input
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
GB2800274A
Other languages
English (en)
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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
Priority claimed from JP48070976A external-priority patent/JPS5240973B2/ja
Priority claimed from JP48141627A external-priority patent/JPS5246092B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB1470457A publication Critical patent/GB1470457A/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
    • G10H3/00—Instruments in which the tones are generated by electromechanical means
    • G10H3/12—Instruments in which the tones are generated by electromechanical means using mechanical resonant generators, e.g. strings or percussive instruments, the tones of which are picked up by electromechanical transducers, the electrical signals being further manipulated or amplified and subsequently converted to sound by a loudspeaker or equivalent instrument
    • G10H3/125—Extracting or recognising the pitch or fundamental frequency of the picked up signal
    • 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
    • G10H2210/031—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal
    • G10H2210/066—Musical analysis, i.e. isolation, extraction or identification of musical elements or musical parameters from a raw acoustic signal or from an encoded audio signal for pitch analysis as part of wider processing for musical purposes, e.g. transcription, musical performance evaluation; Pitch recognition, e.g. in polyphonic sounds; Estimation or use of missing fundamental

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
GB2800274A 1973-06-23 1974-06-24 Signal circuits Expired GB1470457A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP48070976A JPS5240973B2 (ja) 1973-06-23 1973-06-23
JP48141627A JPS5246092B2 (ja) 1973-12-17 1973-12-17

Publications (1)

Publication Number Publication Date
GB1470457A true GB1470457A (en) 1977-04-14

Family

ID=26412090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2800274A Expired GB1470457A (en) 1973-06-23 1974-06-24 Signal circuits

Country Status (4)

Country Link
DE (1) DE2430320C3 (ja)
FR (1) FR2237260B1 (ja)
GB (1) GB1470457A (ja)
IT (1) IT1018694B (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136615A (en) * 1983-03-07 1984-09-19 Daniel Garfield Rhythm controller
EP0217357A2 (en) * 1985-09-30 1987-04-08 Casio Computer Company Limited Waveform normalizer for electronic musical instrument
GB2236443A (en) * 1989-09-01 1991-04-03 Chrontel Inc Phase-locked loop with sampled-data loop filter
GB2253749A (en) * 1990-12-14 1992-09-16 Motorola Inc Fast frequency acquisition in a phase locked loop

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3016385A1 (de) * 1980-04-29 1981-11-05 Realton-Gesellschaft für neuartige Musikinstrumente mbH & Co KG, 5350 Euskirchen Vorrichtung zur umwandlung eines ein nutzsignal bildenden staudruckes in eine elektriche groesse

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944649C (de) * 1951-10-31 1956-06-21 Georges Marcel Charles Jenny Elektronen-Musikinstrument
US3591699A (en) * 1968-03-28 1971-07-06 Royce L Cutler Music voicing circuit deriving an input from a conventional musical instrument and providing voiced musical tones utilizing the fundamental tones from the conventional musical instrument
US3602824A (en) * 1968-08-19 1971-08-31 Sanders Associates Inc Frequency changing apparatus and methods
US3634596A (en) * 1969-08-27 1972-01-11 Robert E Rupert System for producing musical tones
US3697663A (en) * 1971-09-23 1972-10-10 Canadian Patents Dev Pitch sustaining means for a key-operated monophonic instrument

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136615A (en) * 1983-03-07 1984-09-19 Daniel Garfield Rhythm controller
US4530267A (en) * 1983-03-07 1985-07-23 Garfield Daniel J Rhythm controller
EP0217357A2 (en) * 1985-09-30 1987-04-08 Casio Computer Company Limited Waveform normalizer for electronic musical instrument
EP0217357A3 (en) * 1985-09-30 1989-03-08 Casio Computer Company Limited Waveform normalizer for electronic musical instrument
GB2236443A (en) * 1989-09-01 1991-04-03 Chrontel Inc Phase-locked loop with sampled-data loop filter
GB2236443B (en) * 1989-09-01 1993-08-11 Chrontel Inc Phase-locked loop
GB2253749A (en) * 1990-12-14 1992-09-16 Motorola Inc Fast frequency acquisition in a phase locked loop
GB2253749B (en) * 1990-12-14 1995-05-17 Motorola Inc Method for fast frequency acquisition in a phase locked loop

Also Published As

Publication number Publication date
IT1018694B (it) 1977-10-20
FR2237260B1 (ja) 1982-06-04
DE2430320B2 (de) 1980-07-17
FR2237260A1 (ja) 1975-02-07
DE2430320C3 (de) 1981-05-27
DE2430320A1 (de) 1975-01-16

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Legal Events

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

Effective date: 19940623