GB1409763A - Musical tone wave shape generating apparatus - Google Patents
Musical tone wave shape generating apparatusInfo
- Publication number
- GB1409763A GB1409763A GB176873A GB176873A GB1409763A GB 1409763 A GB1409763 A GB 1409763A GB 176873 A GB176873 A GB 176873A GB 176873 A GB176873 A GB 176873A GB 1409763 A GB1409763 A GB 1409763A
- Authority
- GB
- United Kingdom
- Prior art keywords
- memories
- signals
- waveform
- frequency
- control
- 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
- G10H7/00—Instruments in which the tones are synthesised from a data store, e.g. computer organs
- G10H7/02—Instruments 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
- G10H7/04—Instruments 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- General Engineering & Computer Science (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
1409763 Electrophonic musical instruments NIPPON GAKKI SEIZO KK 12 Jan 1973 [17 Jan 1972 (3)] 1768/73 Heading G5J An electrical waveform generator comprises memories M 1 ... M m each storing a number N of samples of a sine wave of one of a harmonic series of frequencies f ... mf. Clock pulses at a frequency Nf from a generator 1, via an encoder 2 and decoders D 1 ... D m , simultaneously scan the corresponding samples in all memories repetitively; and the read-out signals, via respective variable-gain amplifiers VA 1 ... VA m , are mixed at a common output terminal 3 to constitute a complex waveform of fundamental frequency f. The output wave shape is determined by control units C 1 ... C m which set the amplifier gains according to predetermined input resistances Ra 1 ... Ra m etc. For example the resistors Ra 1 ... Ra m are connected to a manual control VR a which, with the said resistance values, determines the amplitude and waveform of a first signal; a second control VR b , via resistors Rb 1 ... Rb m , determines the amplitude and waveform of a second signal to be superimposed on the first; and so on. The fundamental frequency of the output signal is determined by the clock-pulse frequency Nf of the generator 1. Preferably each memory M (Fig. 2) comprises an array of potential dividers R 1a /R 1b ... R Na / R Nb each applying an analogue potential to the drain of one of an array of FETs T 1a ... T Na , whose sources are connected to a common output terminal T out . Excitation of each FET gate in turn by a clock pulse produces a stepwise output signal approximating a sine wave. Memory M 1 stores a single cycle, M 2 two cycles, and so on up to M m which stores m cycles. In a modification (Fig. 3, not shown) the digitized outputs from the memories (M a1 ... M am ) and the control units (A 1 ... A m ) are multiplied in multipliers (ML 1 ... ML m ), digitally added and converted to analogue form. In a further modification (Fig. 4, not shown) the control-unit input resistors are replaced by spectrum memories (SM 1 ... SM 20 ) each storing digitized harmonic-content signals for a desired wave. These signals, multiplied by digitized amplitude signals from units (A a1 ... A a20 ) and added to the weighted signals from other spectrum memories, are passed on to the respective harmonic-frequency multipliers (ML 1 ... ML m as in Fig. 3).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP47006756A JPS5216363B2 (en) | 1972-01-17 | 1972-01-17 | |
JP47006755A JPS4876518A (en) | 1972-01-17 | 1972-01-17 | |
JP47006754A JPS524931B2 (en) | 1972-01-17 | 1972-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1409763A true GB1409763A (en) | 1975-10-15 |
Family
ID=27277330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB176873A Expired GB1409763A (en) | 1972-01-17 | 1973-01-12 | Musical tone wave shape generating apparatus |
Country Status (3)
Country | Link |
---|---|
US (1) | US3821714A (en) |
DE (1) | DE2302222A1 (en) |
GB (1) | GB1409763A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2136228A (en) * | 1983-02-21 | 1984-09-12 | Casio Computer Co Ltd | Waveform data generating system |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3882751A (en) * | 1972-12-14 | 1975-05-13 | Nippon Musical Instruments Mfg | Electronic musical instrument employing waveshape memories |
JPS5735476B2 (en) * | 1973-03-08 | 1982-07-29 | ||
JPS5037422A (en) * | 1973-08-03 | 1975-04-08 | ||
US3894463A (en) * | 1973-11-26 | 1975-07-15 | Canadian Patents Dev | Digital tone generator |
JPS5429256B2 (en) * | 1974-02-13 | 1979-09-21 | ||
GB1503613A (en) * | 1974-03-06 | 1978-03-15 | Matsushita Electric Ind Co Ltd | Electronic musical instruments |
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 |
US3935783A (en) * | 1974-07-08 | 1976-02-03 | The Wurlitzer Company | Electronic piano circuit |
US4036096A (en) * | 1974-07-11 | 1977-07-19 | Nippon Gakki Seizo Kabushiki Kaisha | Musical tone waveshape generator |
US3977291A (en) * | 1974-08-13 | 1976-08-31 | C. G. Conn, Ltd. | Attenuator network for musical instrument keying system |
US3972259A (en) * | 1974-09-26 | 1976-08-03 | Nippon Gakki Seizo Kabushiki Kaisha | Production of pulse width modulation tonal effects in a computor organ |
US4082027A (en) * | 1975-04-23 | 1978-04-04 | Nippon Gakki Seizo Kabushiki Kaisha | Electronics musical instrument |
US4133241A (en) * | 1975-05-27 | 1979-01-09 | Nippon Gakki Seizo Kabushiki Kaisha | Electronic musical instrument utilizing recursive algorithm |
US4182209A (en) * | 1975-12-29 | 1980-01-08 | Mitsubishi Denki Kabushiki Kaisha | Waveform generator |
US4067253A (en) * | 1976-04-02 | 1978-01-10 | The Wurlitzer Company | Electronic tone-generating system |
US4177706A (en) * | 1976-09-08 | 1979-12-11 | Greenberger Alan J | Digital real time music synthesizer |
US4114496A (en) * | 1977-01-10 | 1978-09-19 | Kawai Musical Instrument Mfg. Co., Ltd. | Note frequency generator for a polyphonic tone synthesizer |
US4254681A (en) * | 1977-04-08 | 1981-03-10 | Kabushiki Kaisha Kawai Gakki Seisakusho | Musical waveshape processing system |
JPS54109823A (en) * | 1978-02-17 | 1979-08-28 | Nippon Gakki Seizo Kk | Electronic musical instrument |
US4164020A (en) * | 1978-04-28 | 1979-08-07 | Dynamic Sciences International, Inc. | Programmable sound synthesizer |
US4201105A (en) * | 1978-05-01 | 1980-05-06 | Bell Telephone Laboratories, Incorporated | Real time digital sound synthesizer |
US4192007A (en) * | 1978-05-30 | 1980-03-04 | Lorain Products Corporation | Programmable ringing generator |
US4631747A (en) * | 1978-07-17 | 1986-12-23 | Raytheon Company | Digital sound synthesizer |
US4351213A (en) * | 1979-08-20 | 1982-09-28 | Convey, Inc. | Player for digitally recorded music |
US4338843A (en) * | 1980-01-11 | 1982-07-13 | Allen Organ Co. | Asynchronous interface for electronic musical instrument with multiplexed note selection |
DE3140109C2 (en) * | 1981-10-09 | 1985-08-01 | Hans Peter 4048 Grevenbroich Faßbender | Polyphonic musical instrument with electronic sound generation |
US4633749A (en) * | 1984-01-12 | 1987-01-06 | Nippon Gakki Seizo Kabushiki Kaisha | Tone signal generation device for an electronic musical instrument |
US4646612A (en) * | 1984-07-24 | 1987-03-03 | Nippon Gakki Seizo Kabushiki Kaisha | Musical tone signal generating apparatus employing sampling of harmonic coefficients |
JP2819533B2 (en) * | 1988-05-10 | 1998-10-30 | ヤマハ株式会社 | Music signal generator |
US6223146B1 (en) * | 1994-06-29 | 2001-04-24 | Kelsey-Hayes Company | Method and apparatus for manufacturing a programmed electronic control unit for use in an anti-lock braking (ABS) system |
JP3298486B2 (en) * | 1998-01-30 | 2002-07-02 | ヤマハ株式会社 | Tone generator, address setting method, and recording medium |
US7330769B2 (en) | 2001-05-15 | 2008-02-12 | Nintendo Software Technology Corporation | Parameterized interactive control of multiple wave table sound generation for video games and other applications |
-
1973
- 1973-01-12 GB GB176873A patent/GB1409763A/en not_active Expired
- 1973-01-15 US US00323582A patent/US3821714A/en not_active Expired - Lifetime
- 1973-01-17 DE DE2302222A patent/DE2302222A1/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2136228A (en) * | 1983-02-21 | 1984-09-12 | Casio Computer Co Ltd | Waveform data generating system |
US4612839A (en) * | 1983-02-21 | 1986-09-23 | Casio Computer Co., Ltd. | Waveform data generating system |
Also Published As
Publication number | Publication date |
---|---|
DE2302222A1 (en) | 1973-07-26 |
US3821714A (en) | 1974-06-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19930110 |