GB1442063A - Electronic musical instruments - Google Patents
Electronic musical instrumentsInfo
- Publication number
- GB1442063A GB1442063A GB1593774A GB1593774A GB1442063A GB 1442063 A GB1442063 A GB 1442063A GB 1593774 A GB1593774 A GB 1593774A GB 1593774 A GB1593774 A GB 1593774A GB 1442063 A GB1442063 A GB 1442063A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- waveform
- capacitor
- level
- vco
- 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
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
- G10H5/002—Instruments using voltage controlled oscillators and amplifiers or voltage controlled oscillators and filters, e.g. Synthesisers
-
- 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
- Y10S84/08—Keyed oscillators
-
- 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
- Y10S84/09—Filtering
-
- 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
- Y10S84/20—Monophonic
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
1442063 Electrophonic musical instruments NIPPON GAKKI SEIZO KK 10 April 1974 [1 April 1973 19 April 1973 7 May 1973 16 June 1973 (2) 11 Sept 1973] 15937/74 Heading G5J In an electronic musical instrument, the frequency of a tone generator and/or a formant filter is varied with time during the attack and decay periods of a note. As shown, a voltage controlled oscillator (VCO) 12 produces a tone signal with a frequency mainly determined by a voltage from keyboard 11 indicating which key is depressed. The tone signal is given a desired tone colour by a voltage controlled filter (VCF) 13 and a desired envelope by a voltage controlled amplifier (VCA) 14 before being fed to an output system 15, 16. Wave form generators 17, 18, 19 receive key depression and key release signals from the keyboard 11 and, using parameters stored in the waveform controlling circuit 20, generate waveforms which respectively modify the frequency of VCO 12 the characteristics of VCF 13 and determine the envelope provided by VCA 14. In modifications, waveform generator 17 may be omitted or fixed filters may be switched in or out of circuit between VCO 12 and VCF 13 by the waveform controlling circuit 20. Figs. 11 and 12 (not shown). VCO 12, Fig. 6, receives the tone pitch signal from the keyboard at 21, stores it on a capacitor 22 and through a high-impedence input buffer 23 derives a pitch voltage which is mixed with the waveform control voltage at 24 before being converted to a corresponding current at 25. The oscillator comprises a capacitor 27 which is discharged by transistor 30 every time its voltage reaches a level determined by Schmitt trigger 29. The frequency thus varies with the charging current provided by converter 25. V.C.F. 13, Fig. 7, comprises a current-controlled resistor 34 and a reactor (e.g. a capacitor) 36. The one signal from VCO 12 is applied at 32 and the waveform voltage from generator 18 is converted to e current to vary the reistor 34 to change the filter characteristics. A further signal from the waveform controlling circuit 20 may be applied at 39 to vary the feedback across amplifier 37 and thus the Q of the filter. VCA 14, Fig. 8 (not shown) comprises a current controlled differential amplifier having its in-phase and anti-phase outputs mixed to remove D.C. fluctuations. Waveform generators 17, 18 produce waveforms which rise rapidly to an attack level and immediately fall to a sustain level where they remain until key release when they return to their initial level. The waveform is produced on capacitor 51, Fig. 9. On key actuation capacitor 51 charges up to an attack level determined by a controllable voltage source 50 at a rate determined by controllable resistor 49. On reaching the attack level capacitor 51 is discharged to a sustain level at a rate determined by controllable resistor 55 and, on key release, to the initial level at a rate determined by resistor 57. Waveform generator 19, Fig. 10 (not shown) is similar. Waveform controlling circuit 20.-The parameters needed by the wave form generators are stored in circuit 20 as voltages on voltage dividers. In one embodiment the voltage dividers are potentiometers mounted on a board 71, Fig. 14, which has representations of the waveforms 75, 76, 77 thereon, the potentiometer controls 78 being located at the part of the waveforms they control. An arrangement is described for quickly copying the potentiometer settings into pre-set memory circuit boards for rapid retrieval of a particular group of settings and circuit boards with hard-wired voltage dividers may be provided to simulate particular instruments.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4101673A JPS49129519A (en) | 1973-04-11 | 1973-04-11 | |
JP48044526A JPS49131113A (en) | 1973-04-19 | 1973-04-19 | |
JP48050463A JPS5235537B2 (en) | 1973-05-07 | 1973-05-07 | |
JP6817273A JPS5337734B2 (en) | 1973-06-16 | 1973-06-16 | |
JP1973071497U JPS5611117Y2 (en) | 1973-06-16 | 1973-06-16 | |
JP10641373U JPS5052921U (en) | 1973-09-11 | 1973-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1442063A true GB1442063A (en) | 1976-07-07 |
Family
ID=27550012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1593774A Expired GB1442063A (en) | 1973-04-11 | 1974-04-10 | Electronic musical instruments |
Country Status (3)
Country | Link |
---|---|
US (1) | US3897709A (en) |
DE (1) | DE2417308C3 (en) |
GB (1) | GB1442063A (en) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS552876B2 (en) * | 1973-11-02 | 1980-01-22 | ||
JPS517176A (en) * | 1974-02-28 | 1976-01-21 | Kogyo Gijutsuin | Kobokintaino bunrikaishuhoho |
US3971284A (en) * | 1974-03-04 | 1976-07-27 | Hammond Corporation | Plural mode envelope generator for voltage controlled amplifier |
JPS5433525B2 (en) * | 1974-03-26 | 1979-10-22 | ||
JPS5346447B2 (en) * | 1974-08-14 | 1978-12-14 | ||
JPS5143058A (en) * | 1974-10-09 | 1976-04-13 | Nippon Musical Instruments Mfg | |
JPS56793B2 (en) * | 1974-10-24 | 1981-01-09 | ||
US4012980A (en) * | 1974-11-27 | 1977-03-22 | Nippon Gakki Seizo Kabushiki Kaisha | Control circuitry for a voltage-controlled type electronic musical instrument |
US4018126A (en) * | 1975-03-26 | 1977-04-19 | Walmann Brian I | Tone generation and modification apparatus |
DE2523623C3 (en) * | 1975-05-28 | 1981-10-15 | Naumann, Klaus, 8013 Haar | Electronic musical instrument |
US3986426A (en) * | 1975-08-28 | 1976-10-19 | Mark Edwin Faulhaber | Music synthesizer |
GB1515904A (en) * | 1975-09-11 | 1978-06-28 | Orange Musical Ind Ltd | Digitally controlled amplifying equipment |
JPS52102710A (en) * | 1976-02-25 | 1977-08-29 | Nippon Gakki Seizo Kk | Functional wave generator for electronic instrument |
JPS597395B2 (en) * | 1977-04-04 | 1984-02-17 | ヤマハ株式会社 | electronic musical instrument device |
US4179969A (en) * | 1977-09-12 | 1979-12-25 | Sony Corporation | Tone generator for electrical music instrument |
NL7902238A (en) * | 1978-04-27 | 1979-10-30 | Kawai Musical Instr Mfg Co | DEVICE FOR GENERATING A VOCAL SOUND SIGNAL IN AN ELECTRONIC MUSICAL INSTRUMENT. |
US4205582A (en) * | 1979-02-22 | 1980-06-03 | Kimball International, Inc. | Percussion envelope generator |
JPS55115094A (en) * | 1979-02-28 | 1980-09-04 | Nippon Musical Instruments Mfg | Electronic musical instrument |
JPS55115091A (en) * | 1979-02-28 | 1980-09-04 | Nippon Musical Instruments Mfg | Envelope waveform generator for electronic musical instrument |
JPS55140892A (en) * | 1979-04-19 | 1980-11-04 | Nippon Musical Instruments Mfg | Musical tone controller for electronic musical instrument |
JPS5639593A (en) * | 1979-09-08 | 1981-04-15 | Nippon Musical Instruments Mfg | Electronic musical instrument |
US4829869A (en) * | 1986-01-29 | 1989-05-16 | Yamaha Corporation | Tone control apparatus for electronic musical instrument |
JP2936863B2 (en) * | 1992-01-14 | 1999-08-23 | ヤマハ株式会社 | Tone control device for musical tone signal forming device |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US672678A (en) * | 1898-02-11 | 1901-04-23 | Cyrus Kitching | Device for teaching music. |
US1821311A (en) * | 1930-11-26 | 1931-09-01 | Charles J Lamp | Apparatus for teaching sight-singing |
US3115803A (en) * | 1960-07-08 | 1963-12-31 | Ernest A Pedicano | Electrically operated musical device |
US3186291A (en) * | 1960-07-08 | 1965-06-01 | Ernest A Pedicano | Electrically operated musical device |
US3288909A (en) * | 1960-11-21 | 1966-11-29 | Volodin Andrey Alexandrovich | Keyboard electric musical instrument |
US3288904A (en) * | 1962-09-25 | 1966-11-29 | Hammond Organ Co | Tone frequency control system for electronic musical instruments |
JPS499369B1 (en) * | 1968-01-18 | 1974-03-04 | ||
US3571481A (en) * | 1968-01-18 | 1971-03-16 | Nippon Musical Instruments Mfg | Marimba tone forming system for an electronic musical instrument |
US3538804A (en) * | 1968-06-06 | 1970-11-10 | Hammond Organ Co | Electronic solo instrument having high-note guard circuit |
JPS499371B1 (en) * | 1968-07-19 | 1974-03-04 | ||
US3569603A (en) * | 1968-08-01 | 1971-03-09 | Hammond Corp | Moving formant band-pass amplifier for an electronic musical instrument |
JPS4840410B1 (en) * | 1969-02-08 | 1973-11-30 | ||
US3609203A (en) * | 1969-10-06 | 1971-09-28 | Nippon Musical Instruments Mfg | Partamento musical instrument having a single tone and envelope control |
US3582530A (en) * | 1970-03-11 | 1971-06-01 | Nippon Musical Instruments Mfg | Electronic musical instrument producing percussion signals by additive mixing of component signals |
DE2050357A1 (en) * | 1970-10-14 | 1971-06-03 | Nippon Musical Instruments Mfg | Frequency shift method and arrangement |
US3767833A (en) * | 1971-10-05 | 1973-10-23 | Computone Inc | Electronic musical instrument |
US3755608A (en) * | 1971-12-06 | 1973-08-28 | North American Rockwell | Apparatus and method for selectively alterable voicing in an electrical instrument |
US3828110A (en) * | 1972-01-26 | 1974-08-06 | Arp Instr | Control circuitry for electronic musical instrument |
-
1974
- 1974-04-03 US US457646A patent/US3897709A/en not_active Expired - Lifetime
- 1974-04-05 DE DE2417308A patent/DE2417308C3/en not_active Expired
- 1974-04-10 GB GB1593774A patent/GB1442063A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3897709A (en) | 1975-08-05 |
DE2417308B2 (en) | 1980-11-20 |
DE2417308A1 (en) | 1974-11-14 |
DE2417308C3 (en) | 1981-09-24 |
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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 |
Effective date: 19930410 |