GB1442420A - Production of celeste in a computer organ - Google Patents

Production of celeste in a computer organ

Info

Publication number
GB1442420A
GB1442420A GB6009473A GB6009473A GB1442420A GB 1442420 A GB1442420 A GB 1442420A GB 6009473 A GB6009473 A GB 6009473A GB 6009473 A GB6009473 A GB 6009473A GB 1442420 A GB1442420 A GB 1442420A
Authority
GB
United Kingdom
Prior art keywords
adder
fourier components
counter
count
sets
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
GB6009473A
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 GB1442420A publication Critical patent/GB1442420A/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
    • 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
    • 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

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

1442420 Electrophonic musical instruments NIPPON GAKKI SEIZO KK 28 Dec 1973 [5 Jan 1973] 60094/73 Heading G5J In a computer organ, amplitude samples of two sets of Fourier components with a small frequency difference are calculated and combined to provide amplitude samples of a tone waveform exhibiting a celeste effect. When a key switch 12, Fig. 1, is actuated, a number R representing a corresponding frequency and a number # representing a small frequency difference are read from memories 17 and 18 respectively and applied at the start of a first computation period to adders 30 and 47. The contents of adder 30 is repetitively applied to adder 34 under the control of the first eight counts of a modulo-16 counter 21 to provide a count in adder 34 which determines the points at which a sinusoid table 36 is to be addressed to provide the amplitude samples of eight Fourier components of the true pitch tone. These samples, weighted by harmonic coefficients Cn from memory are fed to an accumulator 13. The eighth count of counter 21, slightly delayed, clears adder 34 and during counts 9-16, with gate 50 instead of 33 open, the Fourier components of the offset frequency are accumulated at 13. The sixteenth count of counter 21 gates the accumulated result to an output system 14, 16, 11. Simultaneously adder 34 is cleared and gates 29, 48 opened to add R and R+# to the contents of adders 30, 47 respectively (i.e. q is incremented by one) and the process is repeated to calculate the sample amplitude of the next sample point. In a modification, Fig. 3 (not shown) the true pitch set consists of fifteen Fourier components and the offset set has but one, and a logic circuit, Fig. 5 (not shown), is provided to inhibit celeste effect on certain notes. In another modification, Fig. 6 (not shown), the frequency of the clock is halved by processing the two sets of Fourier components in parallel. Neither set may be true pitch, one being above and the other below. More than two sets may be used.
GB6009473A 1973-01-05 1973-12-28 Production of celeste in a computer organ Expired GB1442420A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00321231A US3809792A (en) 1973-01-05 1973-01-05 Production of celeste in a computor organ

Publications (1)

Publication Number Publication Date
GB1442420A true GB1442420A (en) 1976-07-14

Family

ID=23249745

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6009473A Expired GB1442420A (en) 1973-01-05 1973-12-28 Production of celeste in a computer organ

Country Status (5)

Country Link
US (1) US3809792A (en)
JP (1) JPS5324810B2 (en)
DE (1) DE2364336C3 (en)
GB (1) GB1442420A (en)
NL (1) NL167047C (en)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888153A (en) * 1973-06-28 1975-06-10 Nippon Gakki Seiko Kk Anharmonic overtone generation in a computor organ
US3884108A (en) * 1974-01-11 1975-05-20 Nippon Musical Instruments Mfg Production of ensemble in a computor organ
US3910150A (en) * 1974-01-11 1975-10-07 Nippon Musical Instruments Mfg Implementation of octave repeat in a computor organ
US3908504A (en) * 1974-04-19 1975-09-30 Nippon Musical Instruments Mfg Harmonic modulation and loudness scaling in a computer organ
US3978755A (en) * 1974-04-23 1976-09-07 Allen Organ Company Frequency separator for digital musical instrument chorus effect
US3929053A (en) * 1974-04-29 1975-12-30 Nippon Musical Instruments Mfg Production of glide and portamento in an electronic musical instrument
US3913442A (en) * 1974-05-16 1975-10-21 Nippon Musical Instruments Mfg Voicing for a computor organ
US3956960A (en) * 1974-07-25 1976-05-18 Nippon Gakki Seizo Kabushiki Kaisha Formant filtering in a computor organ
US3875842A (en) * 1974-08-23 1975-04-08 Nat Semiconductor Corp Multiplexing system for selection of notes in an electronic musical instrument
US3952623A (en) * 1974-11-12 1976-04-27 Nippon Gakki Seizo Kabushiki Kaisha Digital timing system for an electronic musical instrument
JPS5420325B2 (en) * 1974-11-15 1979-07-21
JPS5420326B2 (en) * 1974-11-15 1979-07-21
JPS532763B2 (en) * 1974-11-15 1978-01-31
US4121489A (en) * 1975-07-29 1978-10-24 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument having plural oscillators starting in phase
JPS5932798B2 (en) * 1975-09-17 1984-08-10 ヤマハ株式会社 electronic musical instruments
JPS5237031A (en) * 1975-09-17 1977-03-22 Nippon Gakki Seizo Kk Electronical music instrument
JPS5237032A (en) * 1975-09-17 1977-03-22 Nippon Gakki Seizo Kk Electronical music instrument
US4112803A (en) * 1975-12-29 1978-09-12 Deutsch Research Laboratories, Ltd. Ensemble and anharmonic generation in a polyphonic tone synthesizer
US4073209A (en) * 1976-04-09 1978-02-14 Kimball International, Inc. Method and circuitry for digital-analog frequency generation
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
JPS5450314A (en) * 1977-09-27 1979-04-20 Casio Comput Co Ltd Musical sound generator
US4270431A (en) * 1978-01-13 1981-06-02 Kimball International, Inc. Glide circuit for electronic musical instrument
DE2936935A1 (en) * 1978-09-14 1980-04-24 Nippon Musical Instruments Mfg ELECTRONIC MUSIC INSTRUMENT
US4338849A (en) * 1979-05-31 1982-07-13 Turner William D Electronic transfer organ
US4353279A (en) * 1981-02-02 1982-10-12 Kawai Musical Instrument Mfg. Co., Ltd. Apparatus for producing ensemble tone in an electric musical instrument
JPS5862696A (en) * 1981-10-09 1983-04-14 カシオ計算機株式会社 Electronic musical instrument
US4418602A (en) * 1982-07-13 1983-12-06 Turner William D Transfer organ
JPS6211893A (en) * 1985-08-10 1987-01-20 ヤマハ株式会社 Electronic musical instrument
JP3453044B2 (en) * 1997-06-25 2003-10-06 株式会社河合楽器製作所 Music synthesizer
US9286863B2 (en) * 2013-09-12 2016-03-15 Nancy Diane Moon Apparatus and method for a celeste in an electronically-orbited speaker

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3515792A (en) * 1967-08-16 1970-06-02 North American Rockwell Digital organ
US3610799A (en) * 1969-10-30 1971-10-05 North American Rockwell Multiplexing system for selection of notes and voices in an electronic musical instrument
US3681531A (en) * 1970-09-04 1972-08-01 Industrial Research Prod Inc Digital delay system for audio signal processing
US3696201A (en) * 1970-11-12 1972-10-03 Wurlitzer Co Digital organ system
US3697661A (en) * 1971-10-04 1972-10-10 North American Rockwell Multiplexed pitch generator system for use in a keyboard musical instrument
US3763364A (en) * 1971-11-26 1973-10-02 North American Rockwell Apparatus for storing and reading out periodic waveforms
US3755608A (en) * 1971-12-06 1973-08-28 North American Rockwell Apparatus and method for selectively alterable voicing in an electrical instrument
US3740450A (en) * 1971-12-06 1973-06-19 North American Rockwell Apparatus and method for simulating chiff in a sampled amplitude electronic organ

Also Published As

Publication number Publication date
JPS5324810B2 (en) 1978-07-22
DE2364336B2 (en) 1980-04-17
DE2364336C3 (en) 1980-12-18
US3809792A (en) 1974-05-07
NL7317773A (en) 1974-07-09
NL167047B (en) 1981-05-15
JPS4993011A (en) 1974-09-04
DE2364336A1 (en) 1974-07-18
NL167047C (en) 1981-10-15

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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: 19931227