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GB1469461A - Anharmonic overtone generation in a computor organ - Google Patents

Anharmonic overtone generation in a computor organ

Info

Publication number
GB1469461A
GB1469461A GB2681574A GB2681574A GB1469461A GB 1469461 A GB1469461 A GB 1469461A GB 2681574 A GB2681574 A GB 2681574A GB 2681574 A GB2681574 A GB 2681574A GB 1469461 A GB1469461 A GB 1469461A
Authority
GB
United Kingdom
Prior art keywords
frequency
offset
components
fourier
june
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
GB2681574A
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.)
Nippon Gakki Co Ltd
Original Assignee
Nippon Gakki 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
Application filed by Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Publication of GB1469461A publication Critical patent/GB1469461A/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
    • G10H7/00—Instruments in which the tones are synthesised from a data store, e.g. computer organs
    • G10H7/08—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform
    • G10H7/10—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform using coefficients or parameters stored in a memory, e.g. Fourier coefficients
    • G10H7/105—Instruments in which the tones are synthesised from a data store, e.g. computer organs by calculating functions or polynomial approximations to evaluate amplitudes at successive sample points of a tone waveform using coefficients or parameters stored in a memory, e.g. Fourier coefficients using Fourier coefficients
    • 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
    • G10H1/06—Circuits for establishing the harmonic content of tones, or other arrangements for changing the tone colour

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Algebra (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

1469461 Electrophonic musical instruments; computer synthesizers NIPPON GAKKI SEIZO KK 17 June 1974 [28 June 1973] 26815/74 Heading G5J An electronic musical instrument of the computer organ type is described wherein musical notes are generated from amplitudes of a waveshape to be synthesized from Fourier components at least some of which components are offset in frequency from true harmonics of a designated frequency. The amount of frequency offset for each Fourier component may be fixed, proportional to the designated frequency, proportional to the harmonic number or modulated. As shown, sixteen Fourier components are used to obtain each amplitude which, after computation, is passed through a digital-toanalogue converter in a repeated and specified time interval. The Fourier components may be offset sharp or flat. Alternatively, with the exception of the first, the components may be offset so that they are all true harmonics of some frequency other than that of the first component. Quasi-flow charts for the various operational approaches are given (Figs. 2-6, 8-12, not shown).
GB2681574A 1973-06-28 1974-06-17 Anharmonic overtone generation in a computor organ Expired GB1469461A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US374680A US3888153A (en) 1973-06-28 1973-06-28 Anharmonic overtone generation in a computor organ

Publications (1)

Publication Number Publication Date
GB1469461A true GB1469461A (en) 1977-04-06

Family

ID=23477784

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2681574A Expired GB1469461A (en) 1973-06-28 1974-06-17 Anharmonic overtone generation in a computor organ

Country Status (6)

Country Link
US (1) US3888153A (en)
JP (1) JPS5340527B2 (en)
DE (1) DE2431161C2 (en)
GB (1) GB1469461A (en)
IT (1) IT1015405B (en)
NL (1) NL164983C (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2310032A1 (en) * 1975-04-30 1976-11-26 Minot Pierre HARMONIC FREE SIGNAL GENERATORS
GB1558280A (en) * 1975-07-03 1979-12-19 Nippon Musical Instruments Mfg Electronic musical instrument
JPS5224515A (en) * 1975-08-07 1977-02-24 Nippon Gakki Seizo Kk Electronic instrument
JPS584359B2 (en) * 1975-10-21 1983-01-26 ヤマハ株式会社 Denshigatsuki
US4112803A (en) * 1975-12-29 1978-09-12 Deutsch Research Laboratories, Ltd. Ensemble and anharmonic generation in a polyphonic tone synthesizer
JPS5297722A (en) * 1976-02-12 1977-08-16 Nippon Gakki Seizo Kk Electronic musical instrument
JPS5816198B2 (en) * 1976-04-02 1983-03-30 ヤマハ株式会社 electronic musical instruments
US4177706A (en) * 1976-09-08 1979-12-11 Greenberger Alan J Digital real time music synthesizer
IT1105041B (en) * 1977-08-15 1985-10-28 Norlin Ind Inc IMPROVEMENT IN ELECTRONIC KEYBOARD MUSCIAL INSTRUMENTS
JPS5917838B2 (en) * 1977-11-01 1984-04-24 ヤマハ株式会社 Waveform generator for electronic musical instruments
JPS5925235B2 (en) * 1977-12-13 1984-06-15 ヤマハ株式会社 electronic musical instruments
US4175464A (en) * 1978-01-03 1979-11-27 Kawai Musical Instrument Mfg. Co. Ltd. Musical tone generator with time variant overtones
JPS5521041A (en) * 1978-07-31 1980-02-14 Nippon Musical Instruments Mfg Producing musical tone of electronic device and electronic musical device
DE2936935A1 (en) * 1978-09-14 1980-04-24 Nippon Musical Instruments Mfg ELECTRONIC MUSIC INSTRUMENT
JPS5632188A (en) * 1979-08-24 1981-04-01 Sony Corp Waveform synthesizer
US4345500A (en) * 1980-04-28 1982-08-24 New England Digital Corp. High resolution musical note oscillator and instrument that includes the note oscillator
US4437377A (en) 1981-04-30 1984-03-20 Casio Computer Co., Ltd. Digital electronic musical instrument
JPS5865492A (en) * 1981-10-15 1983-04-19 ヤマハ株式会社 Electronic musical instrument
US4633749A (en) * 1984-01-12 1987-01-06 Nippon Gakki Seizo Kabushiki Kaisha Tone signal generation device for an electronic musical instrument
JPS61196298A (en) * 1985-02-26 1986-08-30 株式会社河合楽器製作所 Electronic musical instrument
US4984496A (en) * 1987-09-08 1991-01-15 Allen Organ Company Apparatus for deriving and replicating complex musical tones
US5900570A (en) * 1995-04-07 1999-05-04 Creative Technology, Ltd. Method and apparatus for synthesizing musical sounds by frequency modulation using a filter
AU5344796A (en) * 1995-04-07 1996-10-23 Creative Technology Ltd Method and apparatus for creating different waveforms when s ynthesizing musical sounds
JP3453044B2 (en) * 1997-06-25 2003-10-06 株式会社河合楽器製作所 Music synthesizer
DE60026189T2 (en) * 1999-03-25 2006-09-28 Yamaha Corp., Hamamatsu Method and apparatus for waveform compression and generation
FR2960688A1 (en) * 2010-06-01 2011-12-02 Centre Nat Rech Scient METHOD AND SYSTEM FOR SYNTHESIZING ANHARMONIC PERIODIC SIGNALS AND MUSICAL INSTRUMENT COMPRISING SUCH A SYSTEM

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000252A (en) * 1953-10-09 1961-09-19 Baldwin Piano Co Electric musical instrument
US3007361A (en) * 1956-12-31 1961-11-07 Baldwin Piano Co Multiple vibrato system
US3004459A (en) * 1956-12-31 1961-10-17 Baldwin Piano Co Modulation system
US3004460A (en) * 1956-12-31 1961-10-17 Baldwin Piano Co Audio modulation system
US3049959A (en) * 1957-11-22 1962-08-21 Baldwin Piano Co Obtaining ensemble and celeste effects in electrical musical instruments
US3147333A (en) * 1960-07-27 1964-09-01 Baldwin Co D H Audio modulation system
US3157725A (en) * 1961-06-01 1964-11-17 Baldwin Co D H System for processing musical spectra
US3305675A (en) * 1962-06-19 1967-02-21 Kurt H Haase Wave form synthesizing apparatus
US3479440A (en) * 1966-08-15 1969-11-18 Baldwin Co D H Randomly-perturbed,locked-wave generator
JPS4911934B1 (en) * 1968-10-21 1974-03-20
US3636337A (en) * 1969-10-29 1972-01-18 Fmc Corp Digital signal generator for generating a digitized sinusoidal wave
US3633017A (en) * 1970-01-07 1972-01-04 Sperry Rand Corp Digital waveform generator
US3809786A (en) * 1972-02-14 1974-05-07 Deutsch Res Lab Computor organ
US3831015A (en) * 1972-06-08 1974-08-20 Intel Corp System for generating a multiplicity of frequencies from a single reference frequency
US3809788A (en) * 1972-10-17 1974-05-07 Nippon Musical Instruments Mfg Computor organ using parallel processing
US3809789A (en) * 1972-12-13 1974-05-07 Nippon Musical Instruments Mfg Computor organ using harmonic limiting
US3809792A (en) * 1973-01-05 1974-05-07 Nippon Musical Instruments Mfg Production of celeste in a computor organ
US3809790A (en) * 1973-01-31 1974-05-07 Nippon Musical Instruments Mfg Implementation of combined footage stops in a computor organ
US3809876A (en) * 1973-08-31 1974-05-07 Us Navy Apparatus for the generation of bessel function signals

Also Published As

Publication number Publication date
NL164983B (en) 1980-09-15
NL7408600A (en) 1974-12-31
DE2431161C2 (en) 1983-07-07
NL164983C (en) 1981-02-16
US3888153A (en) 1975-06-10
JPS5340527B2 (en) 1978-10-27
IT1015405B (en) 1977-05-10
DE2431161A1 (en) 1975-01-16
JPS5036109A (en) 1975-04-05

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years

Effective date: 19940616