GB1481476A - Production of ensemble in a computer organ - Google Patents

Production of ensemble in a computer organ

Info

Publication number
GB1481476A
GB1481476A GB291/75A GB29175A GB1481476A GB 1481476 A GB1481476 A GB 1481476A GB 291/75 A GB291/75 A GB 291/75A GB 29175 A GB29175 A GB 29175A GB 1481476 A GB1481476 A GB 1481476A
Authority
GB
United Kingdom
Prior art keywords
sin
fed
divider
jan
different
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
GB291/75A
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 GB1481476A publication Critical patent/GB1481476A/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
    • G10H1/06—Circuits for establishing the harmonic content of tones, or other arrangements for changing the tone colour
    • G10H1/08—Circuits for establishing the harmonic content of tones, or other arrangements for changing the tone colour by combining tones
    • G10H1/10—Circuits for establishing the harmonic content of tones, or other arrangements for changing the tone colour by combining tones for obtaining chorus, celeste or ensemble effects
    • 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
    • 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
    • Y10S84/04—Chorus; ensemble; celeste

Abstract

1481476 Electrophonic musical instruments NIPPON GAKKI SEIZO KK 2 Jan 1975 [11 Jan 1974] 291/75 Heading G5J The computer organ of Specification 1,442,420 in which Fourier components of two slightly out of tune waveforms are calculated and fed separately to an accummulator through a harmonic coefficient sealer is modified to calculate combined Fourier components first which are then fed to the harmonic coefficient scalar. The instrument as described differs from that of Specifiction 1,442,420 in that in addition to being used to calculate sin nqR/w, the value qR on line 20 is fed to a divider by k 53 to produce a valuo qR/k from which, when added to qR, sin #n/w[qR + (qR/k)] is calculated. The two sin values are added at 38 to form the combined Fourier component k, which may be different for different notes and is preferably a power of 2 so that divider 53 can be a shift register. Alternatively k may be varied periodically by an oscillator. Sinusoid tables 31 and 59 may be replaced by a single time-shared unit. A further channel with a different frequency offset k<SP>1</SP> may be provided to give a trio effect.
GB291/75A 1974-01-11 1975-01-02 Production of ensemble in a computer organ Expired GB1481476A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US432684A US3884108A (en) 1974-01-11 1974-01-11 Production of ensemble in a computor organ

Publications (1)

Publication Number Publication Date
GB1481476A true GB1481476A (en) 1977-07-27

Family

ID=23717184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB291/75A Expired GB1481476A (en) 1974-01-11 1975-01-02 Production of ensemble in a computer organ

Country Status (5)

Country Link
US (1) US3884108A (en)
JP (1) JPS5344813B2 (en)
DE (1) DE2500720C3 (en)
GB (1) GB1481476A (en)
NL (1) NL7500304A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3978755A (en) * 1974-04-23 1976-09-07 Allen Organ Company Frequency separator for digital musical instrument chorus effect
US4112803A (en) * 1975-12-29 1978-09-12 Deutsch Research Laboratories, Ltd. Ensemble and anharmonic generation in a polyphonic tone synthesizer
US4135427A (en) * 1976-04-12 1979-01-23 Deutsch Research Laboratories, Ltd. Electronic musical instrument ring modulator employing multiplication of signals
US4116103A (en) * 1976-07-12 1978-09-26 Deutsch Research Laboratories, Ltd. Pulse width modulation in a digital tone synthesizer
US4270431A (en) * 1978-01-13 1981-06-02 Kimball International, Inc. Glide circuit for electronic musical instrument
DE2818083C2 (en) * 1978-04-25 1985-10-31 National Research Development Corp., London Digital music tone generator
US4205580A (en) * 1978-06-22 1980-06-03 Kawai Musical Instrument Mfg. Co. Ltd. Ensemble effect in an electronic musical instrument
US4231277A (en) * 1978-10-30 1980-11-04 Nippon Gakki Seizo Kabushiki Kaisha Process for forming musical tones
US4353279A (en) * 1981-02-02 1982-10-12 Kawai Musical Instrument Mfg. Co., Ltd. Apparatus for producing ensemble tone in an electric musical instrument
JPS582893A (en) 1981-06-30 1983-01-08 ヤマハ株式会社 Electronic musical instrument
JPS6211893A (en) * 1985-08-10 1987-01-20 ヤマハ株式会社 Electronic musical instrument
US4716805A (en) * 1986-09-08 1988-01-05 Kawai Musical Instrument Mfg. Co., Ltd. Ensemble effect for a musical tone generator using stored waveforms
JPH01144152U (en) * 1988-03-10 1989-10-03
JP3453044B2 (en) * 1997-06-25 2003-10-06 株式会社河合楽器製作所 Music synthesizer
ITMC20030032A1 (en) * 2003-03-28 2004-09-29 Viscount Internat Spa METHOD AND ELECTRONIC DEVICE TO REPRODUCE THE SOUND OF THE BARRELS TO THE SOUL OF THE LITURGIC ORGAN, EXPLOITING THE TECHNIQUE OF PHYSICAL MODELING OF ACOUSTIC INSTRUMENTS

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3305675A (en) * 1962-06-19 1967-02-21 Kurt H Haase Wave form synthesizing apparatus
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
US3681531A (en) * 1970-09-04 1972-08-01 Industrial Research Prod Inc Digital delay system for audio signal processing
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
US3884108A (en) 1975-05-20
DE2500720C3 (en) 1980-12-18
JPS5344813B2 (en) 1978-12-01
JPS50103320A (en) 1975-08-15
DE2500720A1 (en) 1975-07-17
DE2500720B2 (en) 1980-04-17
NL7500304A (en) 1975-07-15

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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

Effective date: 19940102