GB1458405A - Electronic musical instruments - Google Patents

Electronic musical instruments

Info

Publication number
GB1458405A
GB1458405A GB385574A GB385574A GB1458405A GB 1458405 A GB1458405 A GB 1458405A GB 385574 A GB385574 A GB 385574A GB 385574 A GB385574 A GB 385574A GB 1458405 A GB1458405 A GB 1458405A
Authority
GB
United Kingdom
Prior art keywords
clock
octave
low frequency
musical instruments
pulse
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
GB385574A
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.)
NORLIN MUSIC Inc
Original Assignee
NORLIN MUSIC Inc
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 NORLIN MUSIC Inc filed Critical NORLIN MUSIC Inc
Publication of GB1458405A publication Critical patent/GB1458405A/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
    • 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)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

1458405 Electrophonic musical instruments NORLIN MUSIC Inc 28 Jan 1974 [20 Feb 1973] 03855/74 Heading G5J A chorus effect generator for electronic musical instruments uses different frequency synthesiser chips 14, 28, 52 for each octave. The ratio between the repetition frequencies of the input pulse trains differing slightly from two. The top octave 16 is directly derived from a clock 10, the second from the clock divided by two in a flipflop 20 and with the omission of a pulse now and then under the control of low frequency oscillator 34 which is synchronized to the clock by a D-type flip-flop 38. The low frequency and half clock signals C are applied to an exclusive OR 24. Each time the low frequency signal changes state the output 26 does not follow the signal C until a half-period has passed, thus omitting one half-clock frequency pulse for each cycle of the low frequency signal. A third synthesiser 52 similarly derives the third octave 54 to be not exactly half that of the second. In another embodiment, Fig. 3, not shown, the D-type flip-flops and separate oscillators are omitted, the other input of the exclusive OR being taken from an artistically suitable output of one of the frequency synthesisers. A further embodiment, Fig. 4, not shown, uses two cascaded one -shots to insert extra pulses thus giving an octave with frequencies differing by less than a factor of two.
GB385574A 1973-02-20 1974-01-28 Electronic musical instruments Expired GB1458405A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00333985A US3828109A (en) 1973-02-20 1973-02-20 Chorus generator for electronic musical instrument

Publications (1)

Publication Number Publication Date
GB1458405A true GB1458405A (en) 1976-12-15

Family

ID=23305069

Family Applications (1)

Application Number Title Priority Date Filing Date
GB385574A Expired GB1458405A (en) 1973-02-20 1974-01-28 Electronic musical instruments

Country Status (5)

Country Link
US (1) US3828109A (en)
JP (1) JPS546204B2 (en)
CA (1) CA1019602A (en)
GB (1) GB1458405A (en)
IT (1) IT1008240B (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3709097A (en) * 1971-06-28 1973-01-09 Boehler & Co Ag Geb Drilling support for a rock perforator
US3956961A (en) * 1974-10-23 1976-05-18 Peterson Richard H Phase-lock multiple tone generator system
NL7504203A (en) * 1975-04-09 1976-10-12 Philips Nv CIRCUIT FOR OBTAINING CHOICE EFFEKT.
US4121489A (en) * 1975-07-29 1978-10-24 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument having plural oscillators starting in phase
US4063484A (en) * 1975-10-20 1977-12-20 Kimball International, Inc. Method and apparatus for generating tone signals for a musical instrument
JPS5950073B2 (en) * 1977-05-16 1984-12-06 日本ビクター株式会社 Keying system for electronic musical instruments
US4242935A (en) * 1977-08-25 1981-01-06 Peterson Richard H Musical tone generator system using multiple frequency synthesizers
US4388850A (en) * 1977-09-12 1983-06-21 Baldwin Piano & Organ Company Multiple octave generator tuning system
US4186637A (en) * 1977-09-22 1980-02-05 Norlin Industries, Inc. Tone generating system for electronic musical instrument
US4228717A (en) * 1978-06-02 1980-10-21 Norlin Industries, Inc. Electronic musical instrument capable of generating a chorus sound
US4319508A (en) * 1978-06-20 1982-03-16 The Wurlitzer Company Modular, expandable digital organ system
US4196651A (en) * 1978-06-20 1980-04-08 The Wurlitzer Company Non-redundant generator unlocking
US4253366A (en) * 1978-06-20 1981-03-03 The Wurlitzer Company Large scale integrated circuit chip for an electronic organ
US4256002A (en) * 1978-06-20 1981-03-17 The Wurlitzer Company Large scale integrated circuit generator chip for electronic organ
JPS55106493A (en) * 1979-02-10 1980-08-15 Nippon Musical Instruments Mfg Clock signal generator for electronic musical instrument
US4241408A (en) * 1979-04-04 1980-12-23 Norlin Industries, Inc. High resolution fractional divider
US4215616A (en) * 1979-05-24 1980-08-05 Norlin Industries, Inc. Asynchronous tone generator
US4409877A (en) * 1979-06-11 1983-10-18 Cbs, Inc. Electronic tone generating system
US4259888A (en) * 1979-12-06 1981-04-07 Norlin Industries, Inc. Tone generation system employing triangular waves
DE3002095C2 (en) * 1980-01-22 1983-09-01 Reinhard 5401 Emmelshausen Franz Tone generator assembly for electronic musical instruments
DE3006453C2 (en) * 1980-02-21 1982-09-02 Reinhard 5401 Emmelshausen Franz Sound signal control circuit for an electronic musical instrument
US4342247A (en) * 1980-08-28 1982-08-03 The Wurlitzer Company Production of detuning effects in an electronic musical instrument
US4350073A (en) * 1980-09-23 1982-09-21 Peterson Richard H Hybrid pipe organ with electronic tonal augmentation
JPS58166268U (en) * 1982-04-30 1983-11-05 東洋電機製造株式会社 Electric blower for rotating electric machine
JP3603705B2 (en) * 1999-11-29 2004-12-22 ヤマハ株式会社 Sound source circuit and telephone terminal device using the same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3049959A (en) * 1957-11-22 1962-08-21 Baldwin Piano Co Obtaining ensemble and celeste effects in electrical musical instruments
US3347973A (en) * 1964-09-18 1967-10-17 Alfred B Freeman Chorus effects systems
US3499090A (en) * 1967-02-28 1970-03-03 Baldwin Co D H Electronic organ frequency dividing system employing division by odd numbers
NL143713B (en) * 1967-08-15 1974-10-15 Philips Nv GENERATOR FOR SIMULTANEOUSLY GENERATING TONES FROM A BASICALLY EQUIVALENT TONE LADDER AS WELL AS ELECTRONIC MUSIC INSTRUMENT PROVIDED WITH SUCH A GENERATOR.
US3601518A (en) * 1969-10-06 1971-08-24 Charles M Hill Musical instrument and method employing reference frequency source and controlled period multipliers therefor
US3743756A (en) * 1971-08-12 1973-07-03 Philips Corp Method of producing tones of a preferably substantially equal-tempered scale

Also Published As

Publication number Publication date
IT1008240B (en) 1976-11-10
US3828109A (en) 1974-08-06
JPS49115537A (en) 1974-11-05
JPS546204B2 (en) 1979-03-26
CA1019602A (en) 1977-10-25

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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