GB1221490A - Methods of producing tones - Google Patents

Methods of producing tones

Info

Publication number
GB1221490A
GB1221490A GB38384/68A GB3838468A GB1221490A GB 1221490 A GB1221490 A GB 1221490A GB 38384/68 A GB38384/68 A GB 38384/68A GB 3838468 A GB3838468 A GB 3838468A GB 1221490 A GB1221490 A GB 1221490A
Authority
GB
United Kingdom
Prior art keywords
output
circuit
pulses
pulse
gate
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
GB38384/68A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1221490A publication Critical patent/GB1221490A/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
    • 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
    • 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
    • G10H5/06—Instruments in which the tones are generated by means of electronic generators using generation of basic tones tones generated by frequency multiplication or division of a basic tone
    • 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
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/395—Special musical scales, i.e. other than the 12- interval equally tempered scale; Special input devices therefor
    • G10H2210/415—Equally tempered scale, i.e. note tuning scale in which every pair of adjacent notes has an identical frequency ratio equal to 2 to the power 1/n if the scale has n notes per octave
    • G10H2210/435—Huygens scale, i.e. 31 equal intervals per octave, provides near-just major thirds, and provides decent matches for harmonics up to at least 13, despite a slightly less accurate fifth than the standard 12 interval equally tempered scale
    • 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
    • G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
    • G10H2210/395—Special musical scales, i.e. other than the 12- interval equally tempered scale; Special input devices therefor
    • G10H2210/471—Natural or just intonation scales, i.e. based on harmonics consonance such that most adjacent pitches are related by harmonically pure ratios of small integers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

1,221,490. Pulse frequency changers and dividers. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 12 Aug., 1968 [15 Aug., 1967], No. 38384/68. Heading H3T. [Also in Division G5] A pulse frequency changing circuit, Fig. 3, in which the number of pulses at an output E equals the number of pulses applied at an input A less the number of pulses applied at an input D,comprises a group of logic circuits L 1 -L 9 interconnected as shown and arranged so that pulses applied at A produce an output at E except when cut off by pulses applied at D. The logic circuits each produce an output at one level when the inputs are all at the same level and an output of the other level when the inputs differ. Outputs from the circuit are also made available at terminals O and G. By connecting output O to input D, Fig. 4a (not shown), the circuit may function to divide by two a pulse input at A. Two such circuits interconnected as illustrated in Fig. 6a (not shown.) will divide by three. Three circuit interconnected as illustrated in Fig. 7a (not shown) divide by five. The Specification includes the truth table associated with the circuit and gives detailed waveforms of the operation in each mode. Applications of the circuit to the production of a series of tones forming an approximately equally temperred scale for use in an electronic musical instrument (see Divisions G4-G6) are described with reference to Figs. 8 and 9 (not shown). In another circuit, Fig. 1, pulses applied at S 2 are applied through a gate D 3 , D 4 , R 2 and produce an output at S 1 except when the gate is cut off by pulses applied from S 8 through a divider M, whereby the output at S 1 equals the number of pulses at S 2 less the number of pulses at S 3 divided by M. The output from M controls a flip-flop circuit FF, the potential from which at terminal 3 blocks gate D 3 D 4 , R 2 and the potential from which at terminal 4 appears at second gate D 1 , D 2 , R 1 . Each pulse from M triggers FF to cut off the translation of a pulse from S 2 to S 1 the termination of the S 2 pulse resetting FF via gate D 1 , D 2 , R 1 so that subsequent pulses are translated until FF is again triggered.
GB38384/68A 1967-08-15 1968-08-12 Methods of producing tones Expired GB1221490A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL676711170A NL143713B (en) 1967-08-15 1967-08-15 GENERATOR FOR SIMULTANEOUSLY GENERATING TONES FROM A BASICALLY EQUIVALENT TONE LADDER AS WELL AS ELECTRONIC MUSIC INSTRUMENT PROVIDED WITH SUCH A GENERATOR.

Publications (1)

Publication Number Publication Date
GB1221490A true GB1221490A (en) 1971-02-03

Family

ID=19800952

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38384/68A Expired GB1221490A (en) 1967-08-15 1968-08-12 Methods of producing tones

Country Status (10)

Country Link
US (1) US3617901A (en)
JP (1) JPS4916643B1 (en)
AT (1) AT295299B (en)
BE (1) BE719436A (en)
CH (1) CH493058A (en)
DE (1) DE1772991C3 (en)
ES (1) ES357212A1 (en)
FR (1) FR1604209A (en)
GB (1) GB1221490A (en)
NL (1) NL143713B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809787A (en) * 1970-05-30 1974-05-07 Nippon Musical Instruments Mfg Tone generator system
JPS5033157Y2 (en) * 1971-03-06 1975-09-27
US3702370A (en) * 1971-05-19 1972-11-07 John Ray Hallman Jr Digital tone generator system for electronic organ employing a single master oscillator
US3808347A (en) * 1971-06-01 1974-04-30 Itt Electronic music tone generator with pulse generator and frequency dividers
BE785746A (en) * 1971-07-02 1973-01-02 Philips Nv DEVICE ALLOWING TO GENERATE THE NOTES OF A RANGE
US3743756A (en) * 1971-08-12 1973-07-03 Philips Corp Method of producing tones of a preferably substantially equal-tempered scale
DE2261553C2 (en) * 1971-12-29 1982-09-02 Nippon Gakki Seizo K.K., Hamamatsu, Shizuoka Electronic musical instrument - with keyboard, tone generators and frequency dividers and has latching selectors coupled to keyboard via gating circuit
US3790693A (en) * 1971-12-29 1974-02-05 Nippon Musical Instruments Mfg Tone keying and synthesizing system for electronic musical instrument
JPS526613B2 (en) * 1972-06-09 1977-02-23
US3828109A (en) * 1973-02-20 1974-08-06 Chicago Musical Instr Co Chorus generator for electronic musical instrument
US3885489A (en) * 1973-03-14 1975-05-27 Kenju Sangyo Kabushiki Kaisha Electronic musical instrument having keyboards
NL156525B (en) * 1973-10-31 1978-04-17 Philips Nv GENERATOR FOR GENERATING TONES OF A TONE LADDER IN ELECTRONIC MUSIC INSTRUMENTS.
JPS5729718B2 (en) * 1974-06-04 1982-06-24
US3992973A (en) * 1974-09-18 1976-11-23 Kimball International, Inc. Pulse generator for an electronic musical instrument
NL7504203A (en) * 1975-04-09 1976-10-12 Philips Nv CIRCUIT FOR OBTAINING CHOICE EFFEKT.
RU2683121C1 (en) * 2018-06-13 2019-03-26 Илья Витальевич Мамонтов Method of obtaining the signal volume control in theremin
RU2703895C1 (en) * 2019-05-20 2019-10-22 Илья Витальевич Мамонтов Digital signal production method for electric musical instruments

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2541320A (en) * 1948-04-23 1951-02-13 Bell Telephone Labor Inc Multifrequency generator
US3004460A (en) * 1956-12-31 1961-10-17 Baldwin Piano Co Audio modulation system
US3469109A (en) * 1966-04-14 1969-09-23 Hammond Organ Co Musical instrument frequency divider which divides by two and by four

Also Published As

Publication number Publication date
JPS4916643B1 (en) 1974-04-24
AT295299B (en) 1971-12-27
BE719436A (en) 1969-02-13
CH493058A (en) 1970-06-30
DE1772991B2 (en) 1974-01-24
ES357212A1 (en) 1970-03-16
US3617901A (en) 1971-11-02
DE1772991A1 (en) 1971-07-08
DE1772991C3 (en) 1974-08-15
NL6711170A (en) 1969-02-18
NL143713B (en) 1974-10-15
FR1604209A (en) 1971-10-04

Similar Documents

Publication Publication Date Title
GB1221490A (en) Methods of producing tones
US3657658A (en) Program control apparatus
US3096483A (en) Frequency divider system with preset means to select countdown cycle
KR910008965A (en) Variable divider
GB1180418A (en) Waveform Synthesizer
SE7708396L (en) FREQUENCY CALCULATOR
US4845727A (en) Divider circuit
US4344036A (en) Skip count clock generator
US3456200A (en) Frequency divider having a first decade with an adjustable counting length that is repeatable during each divider cycle
GB1399200A (en) Tone generator for generating selected frequencies
US3992635A (en) N scale counter
US3287648A (en) Variable frequency divider employing plural banks of coincidence circuits and multiposition switches to effect desired division
US4318046A (en) Digital frequency divider
US3548319A (en) Synchronous digital counter
US3725791A (en) Divider circuits
US3764790A (en) Technique for extending the frequency range of digital dividers
US3119071A (en) Digital pattern generator
GB1264143A (en)
Maki et al. Generation of design equations in asynchronous sequential circuits
US4081755A (en) Baud rate generator utilizing single clock source
US4231099A (en) Digital function generator
US4176574A (en) Frequency divider for tone source apparatus for Arabian scale in electronic organ
JPS54143056A (en) Variable frequency divider circuit
GB1213794A (en) Tuning of musical instruments
KR970009785B1 (en) Unintentional dividing cluck generator