US3898905A - Monophonic electronic musical instrument - Google Patents

Monophonic electronic musical instrument Download PDF

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Publication number
US3898905A
US3898905A US447905A US44790574A US3898905A US 3898905 A US3898905 A US 3898905A US 447905 A US447905 A US 447905A US 44790574 A US44790574 A US 44790574A US 3898905 A US3898905 A US 3898905A
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United States
Prior art keywords
note
octave
busses
common
binary
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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US447905A
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English (en)
Inventor
Wilford Rayburn Schreier
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.)
Marmon Co
Original Assignee
Hammond Corp
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Filing date
Publication date
Application filed by Hammond Corp filed Critical Hammond Corp
Priority to US447905A priority Critical patent/US3898905A/en
Priority to NL7501456A priority patent/NL7501456A/xx
Priority to ZA00750867A priority patent/ZA75867B/xx
Priority to AU78344/75A priority patent/AU7834475A/en
Priority to IT20540/75A priority patent/IT1031963B/it
Priority to BR1167/75A priority patent/BR7501167A/pt
Priority to DE19752509331 priority patent/DE2509331A1/de
Priority to JP2587175A priority patent/JPS5630558B2/ja
Priority to US05/554,436 priority patent/US3973463A/en
Priority to US05/554,437 priority patent/US3971284A/en
Priority to CA221,098A priority patent/CA1025254A/en
Priority to GB8928/75A priority patent/GB1506272A/en
Application granted granted Critical
Publication of US3898905A publication Critical patent/US3898905A/en
Assigned to MARMON COMPANY reassignment MARMON COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HAMMOND CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G10H1/00—Details of electrophonic musical instruments
    • G10H1/18—Selecting circuits
    • G10H1/22—Selecting circuits for suppressing tones; Preference networks
    • 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
    • Y10S84/02—Preference networks
    • 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

Definitions

  • ABSTRACT 1 1 Gloh Gloh A monophonic electronic music synthesizer in which [58] Field of Search 84/l.01l.03, k ying signals are collected on common note busses [316- 20 and common octave busses with a low note lockout circuit and a low octave lockout circuit to provide un- 1 References Cited ambiguous high note select.
  • PATENTS and octave busses are encoded in binary encoding cir- 3,509,262 4 1970 Munch, Jr 84/101 Cults the resultant binary note and Octave wofds 3,515,792 6/1970 Deutsch ..s4 1.03 Stored 1 and Scripte Word h Decodmg 3,594,487 7/1971 Jones, Jr.. 84/101 X gates fed by the latches gate the high note tone signal 3,610,799 10/1971 Watsonm.
  • FIG.3 FIG.4
  • 4 FIG.6 400 LOW OCTAVE 2 FIG.7 FIG.8 FIG.9
  • FIG. l9 NOTE COLLECT 2 FIG-l3 FIG.3 F
  • Electronic music synthesizers are typically monophonic instruments which involve generating a tone signal of a selected frequency and waveshape and subjecting the tone signal to controlled frequency modulation. controlled filtering. and controlled amplification to produce the desired musical effect. By providing a variety of wave-shapes and dynamic changes in frequency. filtering, and amplification. as well as controlled introduction of noise. various types of orchestral instrument voices can be authentically simulated and unique sounds not made by familiar musical instruments can be generated.
  • a keyboard which is generally similar to a piano or organ keyboard. is provided with keyswitches for each key having a plurality of contact pairs for diffcrentcontrol functions.
  • One contact pair per key is employed to ground ajunction in a precision resistor divider string fed by a constant current source to develop a voltage at the output of the current source which is linearly related to the position of the actuated key on the keyboard.
  • Other contact pairs are employed to produce a keydown" signal. i.e.. a signal that at least one key is depressed. and a legato pulse" signal. i.e.. a signal that a new effective key is depressed.
  • the constant current source and precision resistor divider string comprise a volts store or memorize the voltage signal so that it is available even if the actuated key is released.
  • the memorized voltage signal is fed to a circuit which converts the linear volts per octave signal to an exponential signal.
  • This exponentially varying signal has the proper characteristic to control a voltage-controlled oscillator which thus produces an output tone signal corresponding to the note associated with the actuated key on the keyboard.
  • the output tone signal is fed to a voltagecontrolled filter which may be programmed to have various frequency response characteristics including dynamic characteristics produced by a circuit which produces voltage control envelopes of various types.
  • the filtered signal is furtherprocessed in a voltage-controlled amplifier which may be programmed via a circuit which produces various types of voltage control envelopes to amplitude modulate the signal.
  • a voltage-controlled oscillator itself may be subjected to various types of modulation to produce vibrato and other musical effects.
  • the Wurlitzer Company introduced a synthesizer as an optional add-on feature to several of its electronic organ models.
  • the synthesizer was controlled via a two-octave keyboard separate from the solo keyboard of the organ and thus the player could not play the synthesizer integrally with upper manual solo voices.
  • the Wurlitzer synthesizer employs a single oscillator-parallel divider chain approach to generating the top octave tone signals. These top oetave tone signals are directly fed to a first priority latching network which is coupled to one octave of keyboard switches.
  • the top octave tone signals are also sent through individual frequency dividers to generate the next lowest octave of tones and then are fed to a second priority latching network.
  • a complex arrangement of parallel frequency dividers fedby the two pri- 1 companies have chosen to integrate the type of tone generation system used in Moog and ARP units and to control the tone generation system via additional contacts per key.
  • This invention involves numerous novel circuit designs to accomplish a complete synthesizer system. the advantages of which will be apparent from the detailed description below.
  • FIG. 1 is a generalized block schematic diagram of a synthesizer system employing this invention.
  • FIG. 2 is a block schematic diagram of a synthesizer system in accordance with one embodiment of this invention.
  • FIGS. 3 through 11 together comprise a circuit schematic diagram of a synthesizer system according to 'FlG. 2. 7
  • FIG. 12 illustrates the manner in which FIGS. 3
  • FIG. 16 is a block diagram of another alternate embodiment of this invention.
  • FIGS. 17 and 18 are circuit schematic diagrams which fit together with FIG. 3 and either FIG. or FIG. 14 to disclose the alternate embodiment of FIG. I6.
  • FIG. 19 illustrates how FIGS. I7 and I8 fit into an overall circuit schematic.
  • FIG. 20 is a block diagram of another alternate embodiment of this invention.
  • FIG. 2I is a block diagram of another alternate embodiment of this invention.
  • FIG. 22 is a partial circuit schematic diagram of the alternate embodiment of FIG. 2].
  • FIG. I is a general block diagram of a synthesizer system of the type disclosed in the above-referenced Schrecongost application.
  • Keyboard produces control signals which are fed via cable to keying circuits I which are regular polyphonic organ tone signal keying circuits.
  • Top octave tone generator generates the highest octave of tone signals which are fed via cable to frequency dividers which comprise parallel chains of frequency dividers to generate other octaves of tone signals to be fed to keying circuits I40.
  • Each of the actuated control elements in keyboard 10 operates one or more individual keying circuits in block I40 to produce polyphonic tone signal outputs on cable as in a regular electronic organ system.
  • the polyphonic organ system employs large scale integrated circuits to perform the top octave tone generation. frequency division. and DC keying as is characteristic of recent models of organs introduced by Hammond Organ Company. It would also be preferable to employ a separate oscillator and top octave tone generator to feed frequency dividers 120 so that animation of polyphonic organ signals will be independent of animation of monophonic synthesizer signals.
  • US. Pat. No. 3,534.l44 and 3.636.231 disclose integrated circuit approaches to stairstep synthesis keying for formant organ voices and drawbar synthesis keying for sine wave synthesis organ voices.
  • Keyboard 10 is preferably a single contact per key system and the DC.
  • keying control signals from actuated keys which are fed via cable 20 to organ keying circuits I40 are also sent via cable 40 through low octavc lockout circuit 30 to note collect circuit 60 and octave collect circuit 70 via cable branches 42 and 41.
  • the output signals from note collect circuit 60 are coupled via cable 90 to note perference circuit 160.
  • the output signals from octave collect circuit 70 are fed via cable 50 to low octave lockout circuit 30 and key.
  • octavc preference circuit 190 is preferably a single contact per key system and the DC.
  • Signals from octave collect circuit 70 cause low octave lockout circuit 30 to lock out all control signals from keyboard 10 except those corresponding to the highest octave in which keys are actuated.
  • This lockout is effective only for control signals fed to octave collect circuit 70 and note collect circuit 60 and does not affect the transmission of control signals to organ keying circuits 140 because of isolation resistors (not shown) within keyboard 10.
  • low octave lockout circuit 30 only one octave of keys. namely that of the highest actuated keym is active with respect to the synthesizer portion of the system.
  • This synthesizer system will be described in terms of a high select system which is considered to be more useful when the upper or solo keyboard of an organ is used to control the synthesizer since the melody note is usually the highest note played in polyphonic playing and the synthesizer is essentially a melody instrument. It should be readily apparent that a low select system could be provided for a stand-alone version of the synthcsizer system and would be essentially the reverseof the approach to be described herein. It should also be apparent that a combined low and high select system could also be provided by duplicating the necessary circuitry.
  • Top octave tone generator 100 generates at least the top octave of twelve tone signals on cable 110.
  • the highest C note may also be generated as a thirteenth tone signal.
  • These tone signals on cable I10 feed note preference circuit which is controlled by signals from note collect circuit 60 to gate onto output lead 161 only the tone signal corresponding to the highest note played in the active octave.
  • Divider I70 divides the tone signal on lead 161 into octavely related tone signals on cable 180.
  • Octave preference circuit I90 functions under the control of signals from octave collect circuit 70 to gate onto lead I91 the appropriate one of the octavely related tone signals from divider corresponding to the octave in which the highest key is actuated.
  • the tone signal on lead 191 thus corresponds to the highest key actuated in the active (highest) octave in which keys are actuated.
  • Low octave lockout circuit 30 prevents any higher key actuated in a lower octave from affecting not preference circuit l6] and thereby precludes erroneous tone signal selection when plural keys in different octaves are actuated.
  • the high tone signal on lead 191 is fed to pitch and waveform circuits 200 wherein various different pitches may be selected and different waveforms produced.
  • the selected tone signal of selected pitch and waveform is fed to a voltage-controlled filter 210, thence to a voltage-controlled amplifier. and finally to an output speaker system.
  • Pitch and waveform circuits 200, voltage-controlled filter 210, voltage-controlled amplifier 220, top octave tone generator I00, voltagecontroller oscillator 240, vibrato and portamento circuits 250, filter envelope generator 270, amplifier envelope generator 280, legato pulse generator 260, volts per octave circuit 230 and keydown detector 80 are discussed in detail below in conjunction with FIGS. 2-11.
  • FIG. 2 is a specific block diagram of a synthesizer system according to this invention and will be described in reference to FIGS. 3 to II which show specific circuitry for each of the blocks and which are to be assembled according to FIG. 12.
  • Keyboard 10 octave collect I 70A.
  • keydown detector 80 low octave lockout 30, low note lockout 290, note collect 60, and octave collect 70 are shown in detail in FIG. 5.
  • Keyboard 10 comprises a plurality of keyswitches II coupled to a keying bus 12 to which is applied to -V1 keying potential from a power supply (not shown). Five full octaves of keyswitches are represented by the first and last switch associated with the lowest and highest notes in each octave. Also a siwtch for C6 the 61st note of a console model organ is shown. The number of keyboard octaves is arbitrary.
  • Cable 21 couples keyswitches II to octave collect circuit 70A which comprises a plurality of diodes D4 which gate all keying signals from keyswitches in the same keyboard octave to a common bus.
  • Low octave lockout circuit 30 receives signals from octave collect circuit to lock out keying signals from all but the highest octave in which keyswitches are actuated in the following manner.
  • a keying signal from the C6 kcyswitch is fed through a diode D4 to a transistor gating circuit 30E. This negative keying signal turns on transistor T5 to a saturate condition to ground out common octave bus 085.
  • the keying signal also is fed via the string of diodes D5 to turn on identical transistor gates in blocks 30A to 30D to ground out common octave busses 081 to 084.
  • the ground reference voltages on these busses are coupled through diodes D7 and cable 41 to the junctions between resistors R9 and diodes D3 associated with the first five keyboard octaves. Consequently any keyswitches actuated in any of those keyboard octaves will be locked out by being shunted to ground.
  • a keying signal will appear only on common note bus N131 and common octave bus 086.
  • a keying signal is coupled via cable 21 a diode D4 into block 30D to turn on atransistor gate and thereby to ground out common octave bus 084.
  • the same keying signal is fed to the left through diodes D5 to gate on transistors in circuits 30A to 30C to ground out common octave busses 081 to 0B3, but the keying signal is blocked from going to the right to turn on transistor T5.
  • any keyswitchcs in lower keyboard octaves which are actu ated will not produce keying signals on any common note busses.
  • Low octave lockout circuit 30 thus causes only the highest keyboard octave in which notes are played to be active.
  • Note collect circuit 60 functions to collect all common note keying signals regardless of octave on a common note bus.
  • Diodes D3 coupled between common note keyswitches and common note busses comprise. in effect. multi-input logic OR gates. Note that all C note keyswitches are coupled to common note bus NBl and all B note keyswitches are coupled to common note bus NB12. The same is true for all intermediate notes of the musical scale.
  • Octave collect circuit 11 70 functions to collect all common octave keying signals on a common octave bus.
  • all keying signals from octave one (C1 to B1) are coupled via cable 41 and diodes D7 to common octave bus 081.
  • All keying signals from octave two are coupled similarly to common octave bus 0B2. and so forth for the rest of the keyboard octaves.
  • Low note lockout circuit 290 comprises a plurality of transistor gating circuits 290A to 290K.
  • a keying signal on common note bus NB12 from any actuated B note keyswitch is coupled via diode D9 to gating circuit 290K and turns on transistor T4 to saturation which grounds out common note bus N81].
  • the same keying signal is fed back via the string ofdiodcs D8 to turn on transistors in each of gating circuits 290A to 290.1 andthereby to groundout all common notc busses N81 to NB10.
  • a keying signal on any common note bus thus turns on gating circuits to lock out all keying signals on lower common note busses.
  • low octave lockout circuit 30 and low note lockout circuit 290 The combined action of low octave lockout circuit 30 and low note lockout circuit 290 is to provide unambiguous high note select whereby only the highest keyswitch actuated will effectively produce a keying signal on related common note and common octave busses. It should be noted that. while the low octave lockout circuit locks out keying signals from all but the high note octave at the input to note collect circuit 60 tc prevent a higher note in a lower octave from acting on low note lockout circuit 290. the low note lockout circuit 290 is D.C.
  • low octave lockout circuit 30 isolated via resistors R9 from low octave lockout circuit 30 and this is required to permit low octave lockout circuit 30 to function when the player changes from a particular note in one octave to a lower note in a higher octave. Under such circumstances. low octave lockout circuit 30 must be able to respond to the lower note in the higher octave to lock out the keyboard octave of the former note. Also keying signals for polyphonic organ keying circuits would be taken directly off the keyswitches to avoid the lockout effects of low octave and low note lockout circuits.
  • FIG. 6 shows note binary encoder 300, note word latches 310, octave binary encoder 330, and octave word latches 330. Because low octave and low note lockout circuits provide unambiguous high note select and only one keying signal appears on each of the sets of common note and common octave busses. the note and octave keying signals can be encoded into a binary word for storing in note and octave word latches. A keying signal on common note bus N81 is encoded into the binary word 0001 stored in FFNl to FFN4.
  • Each of the note latches FFNl to FFN4 (see FIG. 6) and octave latches FFOl to FFOS is a standard bistable flip-flop circuit.
  • a negative keying signal on set lead S1 of note latch FFNl turns on transistor T6 which turns off transistor T7 as the collector of transistor T6 and thus the base of transistor T7 goes to ground. This is the

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
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US447905A 1974-03-04 1974-03-04 Monophonic electronic musical instrument Expired - Lifetime US3898905A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
US447905A US3898905A (en) 1974-03-04 1974-03-04 Monophonic electronic musical instrument
NL7501456A NL7501456A (nl) 1974-03-04 1975-02-07 Monofoon elektronisch muziekinstrument.
ZA00750867A ZA75867B (en) 1974-03-04 1975-02-11 A monophonic electronic musical instrument
AU78344/75A AU7834475A (en) 1974-03-04 1975-02-19 Musical instrument
IT20540/75A IT1031963B (it) 1974-03-04 1975-02-21 Strumento musicale elettronico monofonico
BR1167/75A BR7501167A (pt) 1974-03-04 1975-02-27 Instrumento musical eletronico monofonico
DE19752509331 DE2509331A1 (de) 1974-03-04 1975-02-28 Monophones elektronisches musikinstrument
JP2587175A JPS5630558B2 (ja) 1974-03-04 1975-03-03
US05/554,436 US3973463A (en) 1974-03-04 1975-03-03 Delayed vibrato and burble circuit
US05/554,437 US3971284A (en) 1974-03-04 1975-03-03 Plural mode envelope generator for voltage controlled amplifier
CA221,098A CA1025254A (en) 1974-03-04 1975-03-03 Monophonic electronic musical instrument
GB8928/75A GB1506272A (en) 1974-03-04 1975-03-04 Monophonic electronic musical instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US447905A US3898905A (en) 1974-03-04 1974-03-04 Monophonic electronic musical instrument

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US05/554,437 Continuation-In-Part US3971284A (en) 1974-03-04 1975-03-03 Plural mode envelope generator for voltage controlled amplifier
US05/554,436 Continuation-In-Part US3973463A (en) 1974-03-04 1975-03-03 Delayed vibrato and burble circuit

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US3898905A true US3898905A (en) 1975-08-12

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US447905A Expired - Lifetime US3898905A (en) 1974-03-04 1974-03-04 Monophonic electronic musical instrument

Country Status (10)

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US (1) US3898905A (ja)
JP (1) JPS5630558B2 (ja)
AU (1) AU7834475A (ja)
BR (1) BR7501167A (ja)
CA (1) CA1025254A (ja)
DE (1) DE2509331A1 (ja)
GB (1) GB1506272A (ja)
IT (1) IT1031963B (ja)
NL (1) NL7501456A (ja)
ZA (1) ZA75867B (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083283A (en) * 1975-09-17 1978-04-11 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument having legato effect
US4098162A (en) * 1975-12-15 1978-07-04 Nippon Gakki Seizo Kabushiki Kaisha Synthesizer type electronic musical instrument
US4103581A (en) * 1976-08-30 1978-08-01 Kawaii Musical Instrument Mfg. Co. Constant speed portamento
US4186637A (en) * 1977-09-22 1980-02-05 Norlin Industries, Inc. Tone generating system for electronic musical instrument
US4236436A (en) * 1978-11-08 1980-12-02 Kimball International, Inc. Electronic music synthesizer
US4238985A (en) * 1976-02-27 1980-12-16 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument
US4858508A (en) * 1987-01-29 1989-08-22 Yamaha Corporation Electronic musical instrument with tone-sustaining controller

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS542710A (en) * 1977-06-08 1979-01-10 Nippon Gakki Seizo Kk Single tone priority selector of electronic musical instruments

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509262A (en) * 1966-07-11 1970-04-28 Baldwin Co D H Bass register keying system employing preference networks
US3515792A (en) * 1967-08-16 1970-06-02 North American Rockwell Digital organ
US3594487A (en) * 1969-08-25 1971-07-20 Navcor Inc Contactless electronic keyboard array
US3610799A (en) * 1969-10-30 1971-10-05 North American Rockwell Multiplexing system for selection of notes and voices in an electronic musical instrument
US3647929A (en) * 1970-10-08 1972-03-07 Karl F Milde Jr Apparatus for reproducing musical notes from an encoded record
US3760358A (en) * 1972-08-08 1973-09-18 Nippon Musical Instruments Mfg Latching selector for selectively drawing out a single signal from among a plurality thereof
US3771406A (en) * 1971-08-10 1973-11-13 Wurlitzer Co Musical instrument with digital data handling system and lighting display
US3801721A (en) * 1972-06-16 1974-04-02 Baldwin Co D H Monophonic electronic music system with apparatus for special effect tone simulation
US3806623A (en) * 1972-05-24 1974-04-23 Nippon Musical Instruments Mfg Single note selecting storage circuit
US3806624A (en) * 1972-07-14 1974-04-23 Chicago Musical Instr Co Discovery in keying circuit for a musical instrument
US3828643A (en) * 1973-02-20 1974-08-13 Chicago Musical Instr Co Scanner for electronic musical instrument
US3842702A (en) * 1972-06-03 1974-10-22 Matsushita Electric Ind Co Ltd Electronic musical instrument with variable frequency division

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5035804B2 (ja) * 1971-08-09 1975-11-19

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509262A (en) * 1966-07-11 1970-04-28 Baldwin Co D H Bass register keying system employing preference networks
US3515792A (en) * 1967-08-16 1970-06-02 North American Rockwell Digital organ
US3515792B1 (ja) * 1967-08-16 1987-08-18
US3594487A (en) * 1969-08-25 1971-07-20 Navcor Inc Contactless electronic keyboard array
US3610799A (en) * 1969-10-30 1971-10-05 North American Rockwell Multiplexing system for selection of notes and voices in an electronic musical instrument
US3647929A (en) * 1970-10-08 1972-03-07 Karl F Milde Jr Apparatus for reproducing musical notes from an encoded record
US3771406A (en) * 1971-08-10 1973-11-13 Wurlitzer Co Musical instrument with digital data handling system and lighting display
US3806623A (en) * 1972-05-24 1974-04-23 Nippon Musical Instruments Mfg Single note selecting storage circuit
US3842702A (en) * 1972-06-03 1974-10-22 Matsushita Electric Ind Co Ltd Electronic musical instrument with variable frequency division
US3801721A (en) * 1972-06-16 1974-04-02 Baldwin Co D H Monophonic electronic music system with apparatus for special effect tone simulation
US3806624A (en) * 1972-07-14 1974-04-23 Chicago Musical Instr Co Discovery in keying circuit for a musical instrument
US3760358A (en) * 1972-08-08 1973-09-18 Nippon Musical Instruments Mfg Latching selector for selectively drawing out a single signal from among a plurality thereof
US3828643A (en) * 1973-02-20 1974-08-13 Chicago Musical Instr Co Scanner for electronic musical instrument

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4083283A (en) * 1975-09-17 1978-04-11 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument having legato effect
US4098162A (en) * 1975-12-15 1978-07-04 Nippon Gakki Seizo Kabushiki Kaisha Synthesizer type electronic musical instrument
US4238985A (en) * 1976-02-27 1980-12-16 Nippon Gakki Seizo Kabushiki Kaisha Electronic musical instrument
US4103581A (en) * 1976-08-30 1978-08-01 Kawaii Musical Instrument Mfg. Co. Constant speed portamento
US4186637A (en) * 1977-09-22 1980-02-05 Norlin Industries, Inc. Tone generating system for electronic musical instrument
US4236436A (en) * 1978-11-08 1980-12-02 Kimball International, Inc. Electronic music synthesizer
US4858508A (en) * 1987-01-29 1989-08-22 Yamaha Corporation Electronic musical instrument with tone-sustaining controller
US4982644A (en) * 1987-01-29 1991-01-08 Yamaha Corporation Electronic musical instrument with tone-sustaining controller

Also Published As

Publication number Publication date
JPS5630558B2 (ja) 1981-07-15
NL7501456A (nl) 1975-09-08
CA1025254A (en) 1978-01-31
GB1506272A (en) 1978-04-05
IT1031963B (it) 1979-05-10
JPS50122923A (ja) 1975-09-26
ZA75867B (en) 1976-01-28
DE2509331A1 (de) 1975-09-11
BR7501167A (pt) 1975-12-02
AU7834475A (en) 1976-08-19

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