GB1420085A - Electronic musical instrument - Google Patents

Electronic musical instrument

Info

Publication number
GB1420085A
GB1420085A GB5982172A GB5982172A GB1420085A GB 1420085 A GB1420085 A GB 1420085A GB 5982172 A GB5982172 A GB 5982172A GB 5982172 A GB5982172 A GB 5982172A GB 1420085 A GB1420085 A GB 1420085A
Authority
GB
United Kingdom
Prior art keywords
key
counter
memory
channel
memories
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
GB5982172A
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
Priority claimed from JP47001502A external-priority patent/JPS5110089B2/ja
Priority claimed from JP47001504A external-priority patent/JPS518008B2/ja
Priority claimed from JP47001503A external-priority patent/JPS5110090B2/ja
Priority claimed from JP47018359A external-priority patent/JPS5115972B2/ja
Priority claimed from JP47018360A external-priority patent/JPS5115973B2/ja
Priority claimed from JP47019913A external-priority patent/JPS5246494B2/ja
Priority claimed from JP47019911A external-priority patent/JPS5246492B2/ja
Priority claimed from JP47019912A external-priority patent/JPS5246493B2/ja
Application filed by Nippon Gakki Co Ltd filed Critical Nippon Gakki Co Ltd
Publication of GB1420085A publication Critical patent/GB1420085A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC 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
    • G10H1/00Details of electrophonic musical instruments
    • G10H1/18Selecting circuits
    • G10H1/183Channel-assigning means for polyphonic instruments
    • G10H1/187Channel-assigning means for polyphonic instruments using multiplexed channel processors
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC 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
    • G10H1/00Details of electrophonic musical instruments
    • G10H1/02Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
    • G10H1/04Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
    • G10H1/053Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only
    • G10H1/057Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by envelope-forming circuits
    • G10H1/0575Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation during execution only by envelope-forming circuits using a data store from which the envelope is synthesized
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC 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
    • G10H7/00Instruments in which the tones are synthesised from a data store, e.g. computer organs
    • G10H7/02Instruments in which the tones are synthesised from a data store, e.g. computer organs in which amplitudes at successive sample points of a tone waveform are stored in one or more memories
    • G10H7/04Instruments in which the tones are synthesised from a data store, e.g. computer organs in which amplitudes at successive sample points of a tone waveform are stored in one or more memories in which amplitudes are read at varying rates, e.g. according to pitch

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

1420085 Electrophonic musical instruments NIPPON GAKKI SEIZO KK 28 Dec 1972 [30 Dec 1971 (3) 22 Feb 1972 (2) 26 Feb 1972 (3)] 59821/72 Heading G5J In an electrophonic musical instrument instantaneous amplitude samples of a waveform are stored in analog form and means are provided to readout the samples simultaneously at a plurality of selectable rates and produce therefrom a plurality of musical tones. As described the instrument comprises upper and lower keyboards 1b. The operation of a key is detected by a key address code generator la which generates a sequence of binary codes corresponding to each key. The code has eight bits, four to determine the note, three to determine the octave and one to indicate upper or lower keyboard. The keyboard passes a signal to common logic circuit 3 when the code of any actuated key is generated. The logic circuit for achieving this is described, Fig. 2(a) (not shown). On the assumption that no more than ten notes will be required simultaneously, ten signal channels CN are provided. Common logic circuit on receiving a signal from the keyboard checks that there is not already a channel dealing with that key and if not writes the key address code into the memory 2 of a vacant channel. Memory 2 controls a counter 5 to read a wave shape out of either memory 11 or 12. The note bits of the code select one of twelve tone clocks respectively sixteen times the frequencies of the notes of the top octave; the octave bits control where in counter 5 the clock is connected and the upper/lower bit selects memory 11 or 12. In an alternative embodiment, Fig. 4 (not shown), there are separate tone clocks for all notes of all octaves. Attack and decay envelope samples are stored in the first sixteen and last forty-eight address of a memory 14. An envelope counter 6 started when a new key is depressed counts up to 16 reading out the attack waveform which is applied as a scaling factor to the inputs 11a, 12a of the memories 11, 12. Counter 6 then stops until restarted by release of the key to read out the decay envelope to memories 11, 12. The contents of counter 6 is also held during the decay in a truncate counter 7. If a fresh key is depressed while all channels are in use, the common logic 3 checks which channel has progressed furthest with a decay by feeding rapid pulses to all the truncate counters and seeing which overflows first. The overflow signal clears that channel and the new key address is written into its memory 2. If a key is depressed while the corresponding note is decaying, its channel is cleared and the attack starts afresh. The channels are connected in sequence to the memories 11, 12, 14 by a multiplexing counter 8. The memories preferably comprise resistors connected as voltage dividers with the stored sample corresponding to the tapping point, Fig. 5 (not shown).
GB5982172A 1971-12-30 1972-12-28 Electronic musical instrument Expired GB1420085A (en)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP47001502A JPS5110089B2 (en) 1971-12-30 1971-12-30
JP47001504A JPS518008B2 (en) 1971-12-30 1971-12-30
JP47001503A JPS5110090B2 (en) 1971-12-30 1971-12-30
JP47018359A JPS5115972B2 (en) 1972-02-22 1972-02-22
JP47018360A JPS5115973B2 (en) 1972-02-22 1972-02-22
JP47019913A JPS5246494B2 (en) 1972-02-26 1972-02-26
JP47019911A JPS5246492B2 (en) 1972-02-26 1972-02-26
JP47019912A JPS5246493B2 (en) 1972-02-26 1972-02-26

Publications (1)

Publication Number Publication Date
GB1420085A true GB1420085A (en) 1976-01-07

Family

ID=27571440

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5982172A Expired GB1420085A (en) 1971-12-30 1972-12-28 Electronic musical instrument

Country Status (2)

Country Link
US (1) US3844379A (en)
GB (1) GB1420085A (en)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5735476B2 (en) * 1973-03-08 1982-07-29
US3930429A (en) * 1973-06-08 1976-01-06 Arp Instruments, Inc. Digital music synthesizer
US3894463A (en) * 1973-11-26 1975-07-15 Canadian Patents Dev Digital tone generator
US3908504A (en) * 1974-04-19 1975-09-30 Nippon Musical Instruments Mfg Harmonic modulation and loudness scaling in a computer organ
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
US4026180A (en) * 1974-05-31 1977-05-31 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument
JPS5345131B2 (en) * 1974-06-06 1978-12-04
JPS5917433B2 (en) * 1974-06-06 1984-04-21 株式会社河合楽器製作所 Sound source waveform forming device for electronic musical instruments
US3977291A (en) * 1974-08-13 1976-08-31 C. G. Conn, Ltd. Attenuator network for musical instrument keying system
US4083285A (en) * 1974-09-27 1978-04-11 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument
JPS5441497B2 (en) * 1974-11-14 1979-12-08
GB1543958A (en) * 1975-04-23 1979-04-11 Nippon Musical Instruments Mfg Electronic musical instrument
US4174650A (en) * 1975-04-23 1979-11-20 Nippon Gakki Seizo Kabushiki Kaisha Envelope generator for an electronics musical instrument
US4031786A (en) * 1975-08-11 1977-06-28 Warwick Electronics Inc. Tone selector circuit with multiplexed tone data transfer
US4046047A (en) * 1975-08-11 1977-09-06 Warwick Electronics Inc. Note selector circuit for electronic musical instrument
USRE31931E (en) * 1975-08-20 1985-07-02 Nippon Gakki Seizo Kabushiki Kaisha Channel processor
JPS5237028A (en) * 1975-09-17 1977-03-22 Nippon Gakki Seizo Kk Electronical music instrument
JPS52121313A (en) * 1976-04-06 1977-10-12 Nippon Gakki Seizo Kk Electronic musical instrument
GB1580690A (en) * 1976-04-28 1980-12-03 Nat Res Dev Digital generator for musical notes
US4463647A (en) * 1976-08-16 1984-08-07 Melville Clark, Jr. Musical instrument
JPS5848110B2 (en) * 1976-12-24 1983-10-26 カシオ計算機株式会社 Clock number selection device
US4085643A (en) * 1977-03-03 1978-04-25 Nippon Gakki Seizo Kabushiki Kaisha Truncated decay system
US4174649A (en) * 1977-10-17 1979-11-20 Kabushiki Kaisha Kawai Gakki Seisakusho Electronic musical instrument
US4495846A (en) * 1977-11-14 1985-01-29 Williams S Keith Electronic musical instrument
JPS54128323A (en) * 1978-03-28 1979-10-04 Nippon Gakki Seizo Kk Waveform generating device of electronic musical instrument
JPS5654494A (en) * 1979-10-09 1981-05-14 Nippon Musical Instruments Mfg Electronic musical instrument
JPS56117291A (en) * 1980-02-20 1981-09-14 Matsushita Electric Ind Co Ltd Electronec musical instrument
EP0255151B1 (en) * 1980-02-20 1995-12-20 Matsushita Electric Industrial Co., Ltd. Electronic musical instrument
JP2714954B2 (en) * 1988-05-25 1998-02-16 ローランド株式会社 Sound control device
US5990404A (en) * 1996-01-17 1999-11-23 Yamaha Corporation Performance data editing apparatus

Family Cites Families (10)

* 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
US3610806A (en) * 1969-10-30 1971-10-05 North American Rockwell Adaptive sustain system for digital electronic organ
US3577084A (en) * 1969-11-03 1971-05-04 Singer General Precision Computer sound generator
US3604299A (en) * 1970-04-22 1971-09-14 Edward J Englund Method and apparatus for recreating a musical performance
US3647929A (en) * 1970-10-08 1972-03-07 Karl F Milde Jr Apparatus for reproducing musical notes from an encoded record
US3733593A (en) * 1970-10-09 1973-05-15 Rockwell International Corp Capture combination system
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
US3755608A (en) * 1971-12-06 1973-08-28 North American Rockwell Apparatus and method for selectively alterable voicing in an electrical instrument
US3794748A (en) * 1971-12-06 1974-02-26 North American Rockwell Apparatus and method for frequency modulation for sampled amplitude signal generating system

Also Published As

Publication number Publication date
US3844379A (en) 1974-10-29

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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