US3520982A - Method and a device for generating an equal-tempered tone scale in musical instruments - Google Patents

Method and a device for generating an equal-tempered tone scale in musical instruments Download PDF

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Publication number
US3520982A
US3520982A US649984A US3520982DA US3520982A US 3520982 A US3520982 A US 3520982A US 649984 A US649984 A US 649984A US 3520982D A US3520982D A US 3520982DA US 3520982 A US3520982 A US 3520982A
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US
United States
Prior art keywords
frequency
voltage
tone
oscillator
frequencies
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 - Lifetime
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US649984A
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English (en)
Inventor
Karl G Malmfors
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.)
US Philips Corp
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US Philips Corp
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Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3520982A publication Critical patent/US3520982A/en
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    • 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
    • G10H5/00—Instruments in which the tones are generated by means of electronic generators
    • G10H5/02—Instruments in which the tones are generated by means of electronic generators using generation of basic tones
    • G10H5/08—Instruments in which the tones are generated by means of electronic generators using generation of basic tones tones generated by heterodyning

Definitions

  • the capacitor C During an interval when ST delivers 6 volt at its output the capacitor C will be charged by a negative voltage from the output of the stage, i.e. the voltage across C decreases. At a certain value of the voltage of the capacitor the triggering level is reached and the stage switched to the opposite position, in which it delivers 0 volt at its output. The voltage across the capacitor C will now increase until the input voltage reaches the triggering level for switching the stage in opposite direction; then the capacitor voltage will again decrease and the procedure is repeated.
  • an inverted gate pulse is furthermore derived from Sc i.e. a voltage which is 0 during the gate pulse and negative during intermediate intervals, which voltage is applied to the capacitor C through a resistance R
  • Sc i.e. a voltage which is 0 during the gate pulse and negative during intermediate intervals, which voltage is applied to the capacitor C through a resistance R

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Electromagnets (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
US649984A 1966-06-30 1967-06-29 Method and a device for generating an equal-tempered tone scale in musical instruments Expired - Lifetime US3520982A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE893766 1966-06-30

Publications (1)

Publication Number Publication Date
US3520982A true US3520982A (en) 1970-07-21

Family

ID=20275413

Family Applications (1)

Application Number Title Priority Date Filing Date
US649984A Expired - Lifetime US3520982A (en) 1966-06-30 1967-06-29 Method and a device for generating an equal-tempered tone scale in musical instruments

Country Status (9)

Country Link
US (1) US3520982A (de)
AT (1) AT286084B (de)
BE (1) BE700703A (de)
CH (1) CH464660A (de)
DE (1) DE1547588C3 (de)
ES (1) ES342408A1 (de)
GB (1) GB1185888A (de)
NL (1) NL143356B (de)
NO (1) NO120565B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3696201A (en) * 1970-11-12 1972-10-03 Wurlitzer Co Digital organ system
US3775545A (en) * 1969-09-09 1973-11-27 Matsushita Electric Ind Co Ltd Electronic musical instrument employing a sampling system as a coupler
US3795754A (en) * 1971-03-06 1974-03-05 Nippon Musical Instruments Mfg Electronic musical instruments with two master oscillators
US3831172A (en) * 1972-01-03 1974-08-20 Universal Res Labor Inc Solid-state sound effect generating system
RU2683121C1 (ru) * 2018-06-13 2019-03-26 Илья Витальевич Мамонтов Способ получения сигнала управления громкостью у терменвокса

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293499A (en) * 1940-10-15 1942-08-18 Western Electric Co Musical instrument
US2864956A (en) * 1957-12-17 1958-12-16 Ca Nat Research Council Stabilization system for tunable oscillator with reference to a pair of stable oscillators
US2987680A (en) * 1959-04-01 1961-06-06 Bell Telephone Labor Inc Apparatus for generating oscillations of different frequencies
US3202930A (en) * 1961-11-16 1965-08-24 Plessey Co Ltd Apparatus for frequency synthesis

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2293499A (en) * 1940-10-15 1942-08-18 Western Electric Co Musical instrument
US2864956A (en) * 1957-12-17 1958-12-16 Ca Nat Research Council Stabilization system for tunable oscillator with reference to a pair of stable oscillators
US2987680A (en) * 1959-04-01 1961-06-06 Bell Telephone Labor Inc Apparatus for generating oscillations of different frequencies
US3202930A (en) * 1961-11-16 1965-08-24 Plessey Co Ltd Apparatus for frequency synthesis

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3775545A (en) * 1969-09-09 1973-11-27 Matsushita Electric Ind Co Ltd Electronic musical instrument employing a sampling system as a coupler
US3696201A (en) * 1970-11-12 1972-10-03 Wurlitzer Co Digital organ system
US3795754A (en) * 1971-03-06 1974-03-05 Nippon Musical Instruments Mfg Electronic musical instruments with two master oscillators
US3831172A (en) * 1972-01-03 1974-08-20 Universal Res Labor Inc Solid-state sound effect generating system
RU2683121C1 (ru) * 2018-06-13 2019-03-26 Илья Витальевич Мамонтов Способ получения сигнала управления громкостью у терменвокса

Also Published As

Publication number Publication date
AT286084B (de) 1970-11-25
NL143356B (nl) 1974-09-16
ES342408A1 (es) 1968-07-16
DE1547588B2 (de) 1974-01-03
DE1547588C3 (de) 1974-07-25
GB1185888A (en) 1970-03-25
CH464660A (de) 1968-10-31
BE700703A (de) 1967-12-29
NL6708898A (de) 1968-01-02
DE1547588A1 (de) 1969-10-30
NO120565B (de) 1970-11-02

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