US3840691A - Electronic musical instrument with automatic rhythm section triggered by organ section play - Google Patents

Electronic musical instrument with automatic rhythm section triggered by organ section play Download PDF

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Publication number
US3840691A
US3840691A US00296599A US29659972A US3840691A US 3840691 A US3840691 A US 3840691A US 00296599 A US00296599 A US 00296599A US 29659972 A US29659972 A US 29659972A US 3840691 A US3840691 A US 3840691A
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rhythm
detector
clock pulse
cycle
musical instrument
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English (en)
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S Okamoto
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Nippon Gakki Co Ltd
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Nippon Gakki Co Ltd
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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
    • G10H1/36—Accompaniment arrangements
    • G10H1/40—Rhythm
    • 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
    • G10H2210/375—Tempo or beat alterations; Music timing control
    • G10H2210/391—Automatic tempo adjustment, correction or control
    • 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
    • Y10S84/12—Side; rhythm and percussion devices

Definitions

  • An electronic musical instrument comprises an organ Kalsha, Shlzuoka-ken, Japan section including. playing keys and an automatic [22] Filed: Oct 11, 1972 rhythm playing section including a clock pulse oscillator, counter stages, a rhythm pattern pulse encoder, PP 296,599 rhythm selector switches, rhythm tone generators, at key depression detector, a rhythm cycle end detector, [30] Foreign Application priority Data and a start-stop control.
  • a trigger signal is proc apan cuted from the key depression detector and fed to the start-stop control, thereby initiating the automatic F;tS.(l.
  • Automatic rhythm instruments heretofore put to practical application generally include a clock pulse oscillator adapted to generate a repetitive basic tempo pulse train having a frequency or time width corresponding to the shortest beat unit (e.g. a quaver or semiquaver) of the rhythm performance and followed by a multistage frequency dividing counter chain. Output pulses from the respective stages of the counter chain are introduced into a rhythm pattern pulse encoder constructed of the known diode matrix circuit to be converted into various sets of required rhythm pattern pulses'for march, rumba, tango, and so forth.
  • rhythm tempos Before the start or initiation of a rhythm performance, a player selects the desired one or more of various rhythm tempos. Under this arrangement, sounds like those of Various percussion instruments such as cymbals, maracas, claves or ordinary chord or bass sounds or combinations thereof are automatically produced in accordance with the preselected rhythm pattern pulses.
  • rhythm sound performance goesautomatically by itself and independently of the organ section performance and then the organ section for producing ordinary melody sounds or accompaniment sounds like those of the chord or bass upon selective depression of the manual and/or pedal keys of the instrument has to be so played as to meet the tempo of the automatic performance of the rhythm section.
  • a keyboard electronic musical instrument provided'with a conventional automatic rhythm instrument has the'drawback that where a beginner desires to practise a performance on the organ section together with the automatic rhythm performance phrase by phrase or measure by measure, the rhythm performarice goes ahead freely even when the player stops the performance on the organ section to repeat the exercising phrase or measure. Therefore such keyboard instrument fails to be put to such practical application.
  • lt is accordingly the object of this invention to provide an electronic musical instrument incorporated with an automatic rhythm device which enables the tempo of the automatic rhythm performance to better meet the tempo of the organ section performance even though the organ section is played a little irregularly according to the players emotion and which is also convenient for beginners to exercise intermittently and repeatedly.
  • An electronic musical instrument comprises an organ section including playing keys for producing or dinary melody sounds or chord sounds upon selective depression of the keys on the manual keyboard and bass sounds upon selective depression of the keys on the pedal keyboard; and an automatic rhythm section including a clock pulse oscillator for generating repetitive clock pulse corresponding to the shortest beat unit of rhythm performance and followed by four stages of binary counters, a rhythm pattern pulse encoder for producing various sets of rhythm pattern pulse trains by properly combining output pulses from the counter stages, rhythm selector switches connected to the output side of the encoder and selecting out necessary pattern pulses, a plurality of rhythm tone generators selectively triggered by the selected rhythm pattern pulse trains from the slector switches, a key depression detector associated with the playing keys and generating a trigger pulse upon depression of the keys, a rhythm cycle end detector connected to the counter and generating another trigger pulse upon detection of the end of the counter cycle, and a start-stop control circuit connected to the key depression detector and the cycle end detector for receiving the trigger pulses and
  • the clock pulse oscillator included in the rhythm section is normally kept inoperative by the action of the start-stop control circuit, and becomes operative when a trigger signal is generated by the first depression of the manual and/or pedal keys of the organ section which flips the control circuit, thereby initiating the automatic rhythm performance.
  • a pulse signal indicating the end of the pattern flips the control circuit to its original state, thereby stopping the clock oscillator to terminate the automatic rhythm performance.
  • An electronic musical instrument according to this invention arranged as described above' enables an automatic rhythm performance to be newly initiated by the play on the keyboard cycle by cycle, whereby the rhythm progression is kept in tempo with the organ progression.
  • FIG. 1 is a schematic block circuit diagram of an electronic musical instrument according to an embodiment of this invention.
  • FIG. 2 is a schematic block circuit diagram of a modification of FIG. 1;
  • HO. 3 is a practical circuit arrangement of a clock oscillator included in FIGS. 1 and 2;
  • FIG. 4 is a practical circuit arrangement of any of the binary counters included in FIGS. 1 and 2;
  • FIG. 5 is a practical circuit arrangement of the resetting circuit of FlGS. l and 2;
  • FIG. 6 is a practical circuit arrangement of the key depression detector, the start-stop control circuit and the rhythm cycle end detector, in combination.
  • An electronic musical instrument comprises an organ section including playing keys 1, 2 and a rhythm section including conventional portion 10 and a new portion 20 each arranged as described below.
  • the rhythm section includes a clock pulse oscillator 11 of a free-running oscillation type such as an astable multivibrator which generates a repetitive basic tempo pulse train having a frequency corresponding to the shortest beat unit (e.g.
  • the clock pulse oscillator 11 being provided with a frequency changing elements 12 consisting of, for example, a variable resistor; a multistage frequency dividing counter chain 13 formed of four stage cascade arranged binary circuits 13,, 13 13,, and 13, and coupled with the clock pulse oscillator 11; a rhythm pattern pulse encoder l4 constructed of the known diode matrix circuit (as set forth in the US. Pat. No.
  • 3,358,068) including a plurality of column lines L,, L L,, and row lines L,,, L,,, L,, and diodes D selectively connected to the intersections of said column and row lines, so as to complete various sets of required rhythm pattern pulse trains; a rhythm selection circuit 15 allowing a player to select for performance the desired one or more of the various sets or rhythm pattern pulse trains conducted from the encoder l4; and a plurality of rhythm tone generators R,, R R,, for producing the preset one or more of the sounds like those derived from various percussion instruments (e. g. snare drums, bass drums and congas), ordinary chord or bass sounds or combinations thereof in response to the rhythm pattern pulses preselected by the rhythm selection circuit 15.
  • Rhythm tone signals thus produced from the rhythm tone generators R, to R, are conducted to a loud-speaker 17 through a common amplifier 16.
  • An electronic musical instrument can initiate the rhythm performance by the rhythm section 10 in synchronization with the start of the musical performance on the organ section and automatically terminate the rhythm performance at the end of each cycle.
  • the newly added portion 20 includes a plurality of pedal key switches 21 associated with the pedal keys 1 and closed upon selective depression of the keys on the pedal keyboard for regular bass performance, a plurality of manual key switches 22 closed upon selective depression of the keys on the manual keyboard for regular melody or chord performance, a start-stop control circuit 26, a rhythm cycle end detector 27, and a normally open switch.
  • the pedal and manual key switches 2l'and 22 are connected toa key depression detector through the corresponding normal open switches 23 and 24 selectively closed by a player prior to performance.
  • the key depression detector 25 is designed to produce a trigger pulse signal where the pedal and/or manual keys are selectively depressed.
  • the above-mentionedtrigger signal is supplied as a set signal to the start-stop control circuit 26, thereby rendering the clock pulse oscillator 11 operative. Accordingly, a performance is always effected under the condition where the rhythm sounds from the rhythm section start with the musical sounds from the organ section.
  • the cycle end detector 27 is intended to detect the end of the one cycle operating period of the binary circuits 13, to 13,, that is, the end ofa rhythm pattern cycle defined by the period in which sixteen repetitive basic tempo pulses from the clock pulse oscillator 11 are counted.
  • An output trigger signal from the detector 27 is supplied as a reset signal to the control circuit 26 if the normally open switch 28 is closed by a player prior to performance, thereby stopping the clock pulse oscillator 11. Where the switch 28 is kept closed, the rhythm performance stops at the end of the rhythm cycle and starts in time with organ key depression again. Where the switch 28 is kept open, the rhythm performance runs freely as in the case of an ordinary automatic rhythm instrument, until stopped by closure of gang-operated manual start-stop switches 29 and 30.
  • the clock pulse oscillator 11 remains inoperative by the closed switch 29 while the rhythm sounds are not to be played, and becomes operative by opening of the switch 29 when the rhythm performance is to be conducted.
  • the binary counters 13, to 13 are being reset to the orginal state by a resetting circuit 31 under the control of the switch 30 interlocking with the switch 29 (now both closed).
  • Reference numeral 32 in FIG. 1 denotes a feedback switch provided, if required.
  • the first and second stage binary circuits 13, and 13 jointly act as a ternary circuit, thereby changingthe rhythm pattern cycle from the 4- beat kind based on the period in which the clock pulse oscillator produces sixteen clock pulses in a cycle to the 3-beat kind based on the period in which twelve clock pulses are generated in a cycle.
  • FIG. 2 is a schematic circuit diagram of a modification of FIG. 1.
  • the end of each rhythm pattern cycle was detected by an output signal from the counter chain 13.
  • the modification of FIG. 2 there is provided between the output terminal of the clock pulse oscillator 11 (i.e. the input of the counter) and the input terminal of the rhythm cycle end detector 27 a ring counter 41 having the same unit operating period as that of the counter chain 13, namely, sixteen (or twelve interchangeably) positions to count sixteen (twelve) clock pulses generated by the clock pulse oscillator 11.
  • the modification of FIG. 2 can be operated in the same manner and with the same effect as the embodiment of FIG. 1.
  • FIG. 3 shows a practical circuit arrangement of the clock pulse oscillator 11.
  • a circuit 111 has two NPN transistor TR, and TR the emitters of which are connected to a grounded negative power source 51, and the collectors of which are connected to a positive power source 52 via resistors R, and R
  • the base of the transistor TR is connected to the collector of the transistor TR via a capacitor C, and also to the positive power source 52 via the series circuit of a resistor R,, and the variable resistor 12.
  • the base of the transistor TR is connected to the collector of the transistor TR, via a capacitor C and also to the positive power source 52 via a resistor R
  • the collector of the transistor TR is connected via a diode D, of the indicated polarity to the collector of a transistor TR, included in a circuit 26 hereinafter shown in FIG. 6.
  • the collector of the transistor TR is connected to the trigger point of the first stage binary counter 13, as hereinafter shown in FIG. 4.
  • the circuit 111 arranged as described above acts as the know astable multivibrator, and continuously produces from the collector of the transistor TR clock pulse trains having a frequency ortime width defined by the values of the capacitances and the resistances.
  • FIG. 4 is a practical circuit diagram of a given one of, the binary counters 13, to 13,.
  • a circuit 13'l has two N PN transistors TR 1 1 and TR The emitter of the transistor TR is connected to the collector of a transistor TR included in the resetting circuit 311 of FIG. 5 via a line 61, and the emitter of the transistor TR is connected to the negative power source 51.
  • the collectors of both transistors TR and TR are connected to the positive power source 52 via resistors R and R
  • the base of the transistor TR is connected to the collector of the transistor TR via a parallel circuit of a capacitor C and a resistor R
  • the base of the transistor TR is connected to the collector of the transistor TR via parallel connected capacitor C and resistor R
  • Across the collectors of both transistors TR and TR is connected a series circuit of two coupling capacitors C and C
  • the common junction 62 of both capacitors C and C is supplied with output pulses acting as a trigger signal from the clock pulse oscillator or a binary circuit immediately preceding the aforesaid given binary circuit.
  • the circuit 131 acts as the known bistable multivibrator or flip-flop circuit. Under the reset condition of the circuit 131, the transistor TR is on and the transistor TR is off, and under the released condition the transistors TR and TR are alternately turned on and off receiving pulses from the preceding circuit.
  • FIG. 5 is a practical arrangement of the resetting circuit.
  • This circuit 311 includes two NPN transistors "PR and T11 their emitters are connected to the negative power source 51 and their collectors are connected to the positive power source 52 via resistors R and R
  • the base of the transistor TR- is connected to the collector of the transistor TR via a resistor R and the base of the transistor TR is connected to the collector of the transistor TR via a capacitor C and also to the positive power source 52 via a resistor R
  • a differentiation circuit 71 constructed of a grounded resistor R and a capacitor C the circuit 71 acting as a momentary trigger path as later described.
  • a series circuit of a capacitor C and a resistor R is disposed across the positive and negative power sources 52 and 51, and also a forward connected diode D is provided between the base of the transistor TR and the common connection 72 to the capacitor C and the resistor R
  • the circuit 311 of the aforementioned arrangement acts as the known one-shot multivibrator. While the rhythm performance is running, namely, while the switch 30 is opened, the transistor TR, is kept condutive and the transistor TR is kept conductive. Accordingly, the line 61 of FIG. 4 is grounded through the conducting transistor TR bringing the counters ready for counting operation.
  • the four-stage binary circuits 13 to 13, (only one indicated in FIG. 4) count down the pulses into halves successively.
  • the differentiation circuit 71 generates a differentiated positive going impulse which is applied as a trigger signal to the base of the transistor TR to bring the transistor T11 conductive and consequently the transistor TR nonconductive. Therefore, the line 61 of FIG. 4 is brought to the potential of the positive power source 52.
  • the binary counters are forcefully reset regardless of its condition at that time, becoming ready for the next new performance initiating from the first beat of the rhythm cycle.
  • the transistors TR, and TR have the condition reversed, namely, the transistor TR is turned on and the transistor TR is turned off, coming back to the normal state.
  • the capacitor C and resistor R are provided to cause the base of the transistor TR to be momentarily supplied with a positive potential through the diode D at the first power switching-on of the instrument and to be released from such positive supply at the normal working state.
  • FIG. 6 shows a practical circuitry including the key depression detector 25, the start-stop control circuit 26 and the rhythm cycle end detector 27.
  • the key depression detector 25 comprises a differentiation circuit 251 formed of a capacitor C and a resistor R A forward polarized diode D is connected parallel to the resistor R .to attain a DC. clamping to ground.
  • the rhythm cycle end detector 27 includes two directly coupled NPN transistors TR, and TR the emitters of which are connected to the negative power source 51, and the collectors of which are connected to the positive power source 52 via resistors R and R The base of the transistor TR is connected to the output line of the final stage binary counter 13, as shown in FIG.
  • the base of the transistor TR is connected to the collector of the transistor TR
  • the collector of the transistor TR is connected via a capacitor C, to an output line 81 of the detector 27.
  • the diode D of the indicated polarlity is connected between the output line 81 and the positive power source 52 to attain a DC. clamping to the positive power potential.
  • Thestart-stop control circuit 26 includes two NPN transistors TR and TR the emitters of which are connected to the negative power source 51, and the collectors of which are connected to the positive power source 52 via resistors R and R
  • the base of the transistor T12 is connected to the collector of the transistor TR via a parallel circuit of a capacitor C and resistor R
  • the base of the transistor TR is connected to the collector of the transistor TR via a parallel circuit of a capacitor C and resistor R and, if required, also to the negative power source 51 via a resistor R of a large resistance.
  • the collector of the transistor TR is connected to the output line 82 of the key depression detector 251.
  • the collector of the transistor TR is connected to the output line 81 of the rhythm cycle end detector 27 via the switch 28 and also to the negative power source 51 via the switch 29, and further to the collector of the transistor TR included in the clock pulse oscillator 111 of FIG. 3 via the diode D Obviously. the circuit 26 of FIG. 6 arranged as described above act as a bistable circuit.
  • the collector of the transistor TR included in the clock pulse oscillator of FIG. 3 is connected to the grounded negative powersource 51 through the now forward biased diode D causing the collector-emitter path of the transistor TR to be short-circuited. Accordingly, the clock pulse oscillator 111 is kept inoperative to prevent the generation of rhythm sounds.
  • a player opens the gang-actuated switches 29 and 30 and closes one or both of the switches 23 and 24 as a preparation for automatic performance, and then starts playing on the organ by selectively depressing the manual and and/or pedal keys.
  • desired musical sounds consisting of either melody sounds or chord and bass sounds or combinations thereof are produced from the organ section.
  • the moment the first one or ones of the pedal and/or manual keys are depressed and the associated key switches 21 and/or 22 are closed a negative going voltage e as shown in FIG. 6 is generated.
  • the signal e is applied to the differentiation circuit 251. A negative going impulse is produced at the falling of the signal e and a positive going impulse at the rising thereof.
  • the output line 82 Since the positive impulse is shunted by the forward biased diode D the output line 82 only produces the negative impulse e which is applied as a trigger signal to the collector of the transistor TR, included in the start-stop control circuit 26, causing the collector-emitter path of the transistor TR to be short-circuited. Accordingly, the other transistor TR, included in the control circuit 26 is rendered nonconductive and the transistor TR, is rendered conductive. At this time, the diode D is biased backward to release the clock pulse oscillator 111 of FIG. 3 from its dormant state, causing the rhythm section automatically to produce rhythm sounds. The base of the transistor TR still remains at the ground potential.
  • the last counter stage 13 is flipped and the input to the transistor TR exhibits a positive rise as shown by the waveform e In the detector 27, therefore, the transistor TR, is turned on and the transistor TR is turned off at the rising of the pulse e At this time, the capacitor C, connected to the collector of the transistor TR passes a positive pulse wave, which, however, is shunted to the power line 52 through the now forward biased diode D and consequently does not appear on the output line '81 of the rhythm cycle and detector 27.
  • the last counter stage 13 is flipped back and the input to the transistor TR exhibits a negative going fall as shown by the waveform e In the detector 27, therefore, the transistor TR is turned off and the transistor TR is turned on at the falling of the pulse e At this time, the capacitor C passes a negative pulse wave e,, which backward biases the diode D and is conducted to the output line 81 of said detector 27, and then comes out as a trigger signal to the collector of the transistor TR, included in the start-stop control circuit 26, causing the collector-emitter path of the transistor TR, to be short-circuited.
  • the other transistor TR of the control circuit 26 is turned off, and the transistor TR is turned on, which in turn shunts the collector and emitter of the transistor TR through the forward biased diode D,.
  • the clock pulse oscillator 111 is again brought to its stopped to cease the rhythm per formance.
  • the rhythm cycle end detector 27 does not flip the start-stop control circuit, so that the rhythm section 10 obviously continues the automatic rhythm performance as on the conventional automatic rhythm instrument.
  • An electronic musical instrument comprising an organ section for playing melody and accompaniment tones and including a plurality of playing keys; and an automatic rhythm section including a clock pulse oscillator generating repetitive clock pulses, counters connected to said clock pulse oscillator for counting down to submultiples of the frequency of said clock pulses from said clock pulse oscillator, a rhythm pattern pulse encoder connected to said counters for producing plural sets of rhythm pattern pulse trains, each rhythm pattern pulse train being comprised of a combination of different preset output pulses from said counters, a rhythm selection circuit coupled with said encoder to select the desired one or more of the various rhythm pattern pulse trains from said encoder, and a plurality of rhythm tone generators connected to said selection circuit and being selectively triggered by the rhythm pattern pulse train preselected by said rhythm selection circuit to produce said preset one or more rhythm sounds in exact timing with the tempo of the preselected rhythm pattern,
  • a key depression detector coupled to the said playing keys and generating a trigger pulse upon depression of said keys
  • rhythm cycle end detector connected to at least one of said counters and generating another trigger pulse upon detection of the end of the counter cycle
  • start-stop control circuit having inputs coupled to said key depression detector and to said rhythm cycle end detector for receiving said trigger pulses and having an output coupled to said clock pulse oscillator for generating a first output signal for normally maintaining said clock pulse oscillator inoperative
  • said start-stop control circuit including means responsive to the trigger signal from said key depression detector for generating a second output signal to render said clock pulse oscillator operative upon receipt of the trigger signal from said key depression detector, and means responsive to the trigger signal from said rhythm cycle end detector for generating said first output signal to render said clock pulse oscillator inoperative upon receipt of the trigger signal from said rhythm cycle end detector, thereby automatically ending rhythm performance at the end of each rhythm cycle.
  • start-stop control circuit comprises a flip-flop circuit.
  • An electronic musical instrument claimed in claim 1 further including a resetting circuit coupled to said counters for resetting said counters back to a preset original state prior to rhythm performance.
  • said clock pulse oscillator comprises an astable multivibrator with a frequency control element.
  • rhythm pattern pulse encoder connected to said counters for producing plural sets of rhythm pattern pulse trains, each rhythm pattern pulse train being comprised of a combinaton of different preset output pulses from said counters, a rhythm selection circuit coupled with said encoder to v select the desired one or more of the various rhythm pattern pulse trains from said encoder, and a plurality of rhythm tone generators connected to said selection circuit and being selectively triggered by the rhythm pattern pulse train preselected by said rhythm selection circuit to produce said preset one or more rhythm sounds in exact timing with the tempo of the preselected rhythm pattern,
  • a key depression detector coupled to the plain keys and generating a trigger pulse upon depression of said keys
  • a ring counter coupled to the input of said counters and producing a signal at the end of a cycle
  • rhythm cycle end detector connected to the output of said ring counter and generating another trigger pulse upon detection of the end of the ring counter cycle
  • a start-stop control circuit having inputs coupled to said key depression detector and to said rhythm cycle end detector for receiving said trigger pulses and having an output coupled to said clock pulse oscillator for generating a first output signal for normally maintaining said clock pulse oscillator inoperative
  • said s'tart-stop control circuit including means responsive to the trigger signal from said key depression detector for generating a second output signal to render said clock pulse oscillator operative upon receipt of the trigger signal from said key depression detector, and means responsive to the trigger signal from said rhythm cycle end detector for generating said first output signal to render said clock pulse oscillator inoperative upon receipt of the trigger signal from said rhythm cycle end detector, thereby automatically ending rhythm performance at the end of each rhythm cycle.
  • start-stop control circuit comprises a flip-flop circuit.
  • said clock pulse oscillator c comprises an astable multivibrator with a frequency control element.

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US00296599A 1971-10-18 1972-10-11 Electronic musical instrument with automatic rhythm section triggered by organ section play Expired - Lifetime US3840691A (en)

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JP46082353A JPS5241648B2 (enrdf_load_stackoverflow) 1971-10-18 1971-10-18

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US (1) US3840691A (enrdf_load_stackoverflow)
JP (1) JPS5241648B2 (enrdf_load_stackoverflow)
DE (1) DE2251056A1 (enrdf_load_stackoverflow)
NL (1) NL7213946A (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977290A (en) * 1975-03-05 1976-08-31 Kabushiki Kaisha Kawai Gakki Seisakusho Electronic musical instrument
US4090349A (en) * 1976-04-08 1978-05-23 Tokyo Shibaura Electric Co., Ltd. Electronic music box circuit
US4135423A (en) * 1976-12-09 1979-01-23 Norlin Music, Inc. Automatic rhythm generator
WO1980000108A1 (en) * 1978-06-20 1980-01-24 Wurlitzer Co Master control lsi chip
US4217806A (en) * 1978-09-28 1980-08-19 Roland Corporation Automatic rhythm generating method and apparatus in electronic musical instrument
US4305319A (en) * 1979-10-01 1981-12-15 Linn Roger C Modular drum generator
US4319508A (en) * 1978-06-20 1982-03-16 The Wurlitzer Company Modular, expandable digital organ system
US4411184A (en) * 1980-06-26 1983-10-25 Marmon Company Musical instrument having programmable automatic rhythm pattern variations
US4443114A (en) * 1978-01-17 1984-04-17 Sharp Kabushiki Kaisha Electronic timepiece with melody alarm faculties
US6107559A (en) * 1996-10-25 2000-08-22 Timewarp Technologies, Ltd. Method and apparatus for real-time correlation of a performance to a musical score
US6166314A (en) * 1997-06-19 2000-12-26 Time Warp Technologies, Ltd. Method and apparatus for real-time correlation of a performance to a musical score
US20130339035A1 (en) * 2012-03-29 2013-12-19 Smule, Inc. Automatic conversion of speech into song, rap, or other audible expression having target meter or rhythm

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5093134A (enrdf_load_stackoverflow) * 1973-12-18 1975-07-25
JPS56317Y2 (enrdf_load_stackoverflow) * 1979-11-01 1981-01-07
JPS5693795U (enrdf_load_stackoverflow) * 1979-12-19 1981-07-25

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3977290A (en) * 1975-03-05 1976-08-31 Kabushiki Kaisha Kawai Gakki Seisakusho Electronic musical instrument
US4090349A (en) * 1976-04-08 1978-05-23 Tokyo Shibaura Electric Co., Ltd. Electronic music box circuit
US4135423A (en) * 1976-12-09 1979-01-23 Norlin Music, Inc. Automatic rhythm generator
US4443114A (en) * 1978-01-17 1984-04-17 Sharp Kabushiki Kaisha Electronic timepiece with melody alarm faculties
WO1980000108A1 (en) * 1978-06-20 1980-01-24 Wurlitzer Co Master control lsi chip
US4218949A (en) * 1978-06-20 1980-08-26 The Wurlitzer Company Master control LSI chip
US4319508A (en) * 1978-06-20 1982-03-16 The Wurlitzer Company Modular, expandable digital organ system
US4217806A (en) * 1978-09-28 1980-08-19 Roland Corporation Automatic rhythm generating method and apparatus in electronic musical instrument
US4305319A (en) * 1979-10-01 1981-12-15 Linn Roger C Modular drum generator
US4411184A (en) * 1980-06-26 1983-10-25 Marmon Company Musical instrument having programmable automatic rhythm pattern variations
US6107559A (en) * 1996-10-25 2000-08-22 Timewarp Technologies, Ltd. Method and apparatus for real-time correlation of a performance to a musical score
US6166314A (en) * 1997-06-19 2000-12-26 Time Warp Technologies, Ltd. Method and apparatus for real-time correlation of a performance to a musical score
US20130339035A1 (en) * 2012-03-29 2013-12-19 Smule, Inc. Automatic conversion of speech into song, rap, or other audible expression having target meter or rhythm
US9666199B2 (en) * 2012-03-29 2017-05-30 Smule, Inc. Automatic conversion of speech into song, rap, or other audible expression having target meter or rhythm
US10290307B2 (en) 2012-03-29 2019-05-14 Smule, Inc. Automatic conversion of speech into song, rap or other audible expression having target meter or rhythm
US12033644B2 (en) 2012-03-29 2024-07-09 Smule, Inc. Automatic conversion of speech into song, rap or other audible expression having target meter or rhythm

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JPS5241648B2 (enrdf_load_stackoverflow) 1977-10-19
DE2251056A1 (de) 1973-04-26
JPS4847821A (enrdf_load_stackoverflow) 1973-07-06
NL7213946A (enrdf_load_stackoverflow) 1973-04-24

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JPS5918471Y2 (ja) 電子楽器