Abstract: A percussion instrument employs a horizontal surface whose dimensions are about 1 foot.times.2 feet.times.3/8 inch made of oak. This piece of oak has transducers on its under side and is spaced one or two inches above the floor. The percussionist sits on a stool where he can tap this piece of oak with the heels and toes of his shoe. Mounted at an elevation and position within easy reach of the percussionist are a number of tubular drums which the percussionist may strike with a drumstick. These tubular drums are about two inches in diameter and each of them has a central cavity in which a transducer is located.

Abstract: A portable drum sound simulator is provided which includes an electronic drum sound generating means capable of generating a plurality of drum-like sound outputs and energizable in response to electrical trigger signals. Also included is a tone pitch varying means which varies by a plurality of steps the tone pitch of the drum-like sound outputs. A switch allows a user to select a desired drum-like sound output and another switch allows a user to select a desired tone pitch for the drum-like sound output. These two switches are each mounted on a respective drumstick each of which also includes a normally open electrical switch. These electrical switches are connected to the drum sound generating means and when closed causes a trigger circuit to develop a trigger signal which energizes the drum sound generating means so as to generate the drum-like sound output.

Abstract: An electronic musical instrument provides an automatic tonality designating function capable of automatically designating a desirable tonality based on a chord and a rhythm kind which are respectively designated. The chord is designated by simultaneously depressing plural keyboard keys, while desirable one of plural rhythm kinds which are predetermined in advance is designated by the performer. In addition, a desirable mode can be determined based on the designated chord. Based on the mode, chord and rhythm kind, an automatic accompaniment can be performed. Further, this electronic musical instrument can also provide a chord detecting apparatus capable of automatically detecting a desirable chord based on plural notes (or note names) designated by the performer. In such chord detection, an evasive note is automatically omitted from all notes designated by the performer, so that the desirable chord can be detected with accuracy.

Abstract: According to this invention, an electronic drum has a head portion. An annular frame is arranged to generally surround the head portion. A vibration plate is arranged to be in tight contact with a lower surface of the head portion, and vibrates in response to the performer's strike of the head portion. A pickup device is mounted on the vibration plate so as to detect the vibration of the vibration plate. A vibration preventing portion is inserted between the head portion and the annular frame so as to prevent the vibration from being transmitted to the annular frame. The head portion and the vibration preventing portion are integrally formed of a flexible material. A sound device is connected to the pickup device so as to produce a drum sound in response to the detected vibration.

Abstract: An electronic metronome comprises circuitry for setting a desired tempo, a circuit for generating a tempo signal corresponding in time to the desired tempo, circuitry for setting a desired time period and a circuit for generating a time-up signal corresponding in time to the end of the desired time period. A sound generator receives the tempo signal and the time-up signal for generating a tempo sound for each tempo signal and a time-up sound for the time-up signal. A control circuit terminates the generation of the tempo sounds after the generation of the time-up sound.

Abstract: A method and apparatus is provided for the adjustment of resonance on a freely vibrating filament by the use of piezoelectric pushers which are solid state devices whose lengths change as a result of applied voltage. The pushers are configured in such a manner that changes in the pushers' lengths are translated into changes in resonance. The pushers are controlled by feedback circuit wherein frequency of vibration is compared to an electronically generated reference. The resulting error signals are input to DC amplifiers which drive the piezoelectric pushers so as to eliminate the error.

Abstract: An automatic performance apparatus provides a memory capable of storing plural parts of a desirable tune, wherein each part can be independently recorded or reproduced, regardless of recording or reproduction of another part. While performance information of one part is recorded or reproduced after a first detector detects the designation of recording or reproducing of one part so that an automatic performance of one part is played, the automatic performance apparatus can reproduce another performance information of another part after a second detector detects a section end of one part so that another automatic performance of another part is played. This another part is started to be automatically performed at the timing synchronizing with a progress of recording or reproducing the performance information of one part. Thus, the synchronization between one part and another part can be automatically obtained without effort.

Abstract: An electronic musical instrument includes a performance operating member, a sound source unit, an assignment information memory, a control information register and a determining unit. The sound source unit generates a plurality of rhythm tones. The assignment information memory stores assignment information representing a type of rhythm tone assigned to the performance operating member. The control information register registers the assignment information in the assignment information memory in response to a manual operation of a performer. The determining unit determines a rhythm tone to be assigned to the performance operating member in accordance with a number of operation times of the performance operating member in relation to an operation of the control information register.

Abstract: A music synthesizer is constructed according to a modular scheme with plural, substantially interchangeable voice units. During operation, these voice units are used to simulate different instruments. The voice units operate under control of a master computer, and take waveform data from a common memory through a common digital data bus. The actions of each voice unit in simulating a note are controlled according to a plurality of control parameters. These control parameters are derived by interpolating between plots of each control parameter versus time for a weak actuation (soft note) and a strong actuation (hard note) condition. The synthesizer is arranged to simulate the effects caused by the interactions between closely spaced excitations of the same instrument such as closely spaced strikes upon a drumhead, by varying the qualities of the sound. The synthesizer may also serve as a mixer or as a multichannel signal processing device.

Abstract: A striker designed to strike or be swung for playing music is provided with a musical sound-initiating command signal-generating device including switching members. When the striker strikes or swings, the switching members perform a switching action which triggers the transmitting of a musical sound-initiating command signal from the musical sound-initiating command signal-generating device. A desired musical sound is produced by a musical sound producing unit in response to the musical sound-initiating command signal. A number of different timbres can be selectively used for a musical tone, by operating a timbre-selecting switch provided on the striker.

Abstract: A device for correcting a timing of music playing information including a determining unit and a correcting unit, the correcting unit corrects the timing of the change of the performance of a piece of music, which is outside the range of short time data, to a timing within the range of the short time data, in response to a determination by the determining unit.

Abstract: An electronic musical instrument having a rhythm performance function includes a first memory for pre-storing plural rhythm tone kinds, rhythm selecting switches each capable of designating one of said rhythm tone kinds and a rhythm tone generator having plural channels. The selected rhythm tone kind is assigned to each channel of the rhythm tone generator. A rhythm tone corresponding to the selected rhythm tone kind is generated by each channel so that continuous rhythm tones will be generated by plural channels based on time division system. In addition, before playing a rhythm performance, rhythm patterns can be arbitrarily programmed and then stored into a second memory by operating the rhythm selecting switches and other switches corresponding to the predetermined rhythm tones of plural musical instruments.

Abstract: A percussion instrument transducer for converting a striking impact into a representative electrical impulse triggering signal. The transducer is formed of a piezoelectric member of disc shape secured to an electrically conductive disc. The piezoelectric member and disc are supported in a housing on a support platform of smaller diameter than the diameter of the disc so that the periphery of the disc is cantilevered beyond the support platform to provide enhanced piezoelectric impulse action.

Abstract: The invention relates to a programmable electronic metronome, capable of registering all meter and speed characteristics of any musical work and of producing, when the musical work is to be performed, substantially sharp, perceivable, e.g. acoustic, signals representing said characteristics in the appropriate succession. The metronome comprises a keyboard for producing signals associated with at least three variables, which are bar number, speed and meter, and defining digital values for said variables, which values are stored in at least one volatile electronic memory, comprising segments severally correlated to each of said variables, to define digital data sequences. The metronome further comprises a reader for the data sequences, whereby to associate to each bar number digital values of speed and meter, and a transducer for transforming said values into electric impulses, which produce a corresponding succession of perceivable signals.

Abstract: An automatic performance apparatus that can change the performance speed of desired sections in a piece of music automatically performed. The apparatus comprises a section designator for designating a specific section in the piece, a time evaluator for counting performance duration of the piece, a modifier for modifying either the duration of the specific section (or the duration of a section other than the specific section) by modifying the tempo of the automatic performance or duration of notes of the performance data so that the performance duration of the automatic performance becomes equal to the desired duration. Thus, the total duration of the piece is adjusted to the desired duration while maintaining the duration of the specified section (or the duration of the sections other than the specified section).

Abstract: A computerized music notation system includes a first keyboard having pitch keys, a second keyboard for entering relative rhythm codes representing the relative proportions by which the entered pitches and other rhythm types divide a beat and a terminator code to mark the end of each beat, and a computer executing a processing program for generating output music notation in beat units based upon the pitch data and the rhythm data. The pitch and rhythm data sets are independent of each other. The computer processes the pitch data assigning pitch names in the selected key of music, and the rhythm data in beat units by assigning computed fixed duration values to the rhythm types in accordance with the selected time signature. The pitch and rhythm data are combined and processed for output with other notation features, such as staff lines, stems, flags, beams, articulation marks, etc.

Abstract: An electronic musical instrument includes a performance operating member, a performance operation detection unit, a self vibration detection data forming unit, a tone generation control unit, and a tone signal generator. The performance operation detection unit forms performance operation detection data corresponding to an operation amount of the performance operating member. When the performance operation detection data of the performance operating member is obtained, the self vibration detection data forming unit forms self vibration detection data determined by a performance operation mounted based on previous performance operation detection data obtained by a previous performance operation of the performance operating member and by a first lapse time interval from when previous performance operation detection data were obtained until a present time.

Abstract: An automatic musical performance apparatus comprising two groups of tracks: one for storing pattern data of musical performance, the other for storing level data that modify the volume of tones produced on the basis of the pattern data, so that tone volume of each track can be altered while listening to the tone being reproduced. Tone volume varies depending on volume control and key-velocity. One of these can be selected to be modified by the level data, thus causing different effect on tone volume control. There are three kinds of level data: track, group, and total. Track level data modify each track data in the pattern data, each set of group level data modifies track data belonging to the same group, and the total level data uniformly modifies all track data. Using group level data facilitates the setting of level data. The pattern data can include a number track data having different loop length and rhythm style, thus enabling the automatic performance of polyrhythm style.

Abstract: An automatic composer comprises an input device which inputs part of a musical piece and information on the progression of music such as a chord progression, an analyzer which extracts parameters characterizing the part of the musical piece, and a melody generator which develops the complete musical piece by using the characteristic parameters and the chord progression. As a result, the characteristics of the part of the musical piece may be present, to a desired extent, throughout the completed musical piece, so that a satisfactory balance is achieved between the consistency and variety of the music.

Abstract: The present invention relates to an electronic rhythm performing apparatus which can generate both automatic rhythm sounds and manual rhythm sounds. In particular, the present invention relates to an apparatus which allows an operator to temporarily stop the generation of automatic rhythm, tones or to reduce the volume of automatic rhythm, tones at a predetermined point in the music; and to later produce a manual rhythm sound as the indication that the automatic rhythm sound should be resumed.

Abstract: An electronic drum has cylindrical non-planar playing surface, and a force sensing detection unit is attached to the playing surface. The force sensing detection unit converts external striking forces applied to the playing surface into electrical output pulses. The electronic drum is attached to a mount shaft assembly with a resilient portion interposed between the electronic drum and the mount shaft. The mount shaft assembly enables the electronic drum to be mounted onto various support stands.

Abstract: An electronic musical instrument has a parameter setting system for setting a parameter necessary for controlling a musical characteristic which is a tone color or a musical effect such as a vibrato in a musical tone generating section. The parameter setting system comprises a memory (RAM) for storing a plurality of sets of parameters each set including, for example, a vibrato delay parameter and a vibrato speed parameter. When one of tone-color selection switches on a control panel is depressed, the set of parameters corresponding to the depressed tone-color selection switch are read and supplied to the musical tone generating section to thereby control the vibrato of the musical tone. The selected set of parameters in the RAM can be changed by the player through menu selection switches and data-up and data-down switches to desired values. The system may include a quit switch for restoring the set of parameters precedingly selected.

Abstract: For detecting a difference in rendition, a bar incorporated in an electronic percussion system includes a supporting block having a surface portion, a top member having a first surface portion and a second surface portion located at the reverse side of the first surface portion, and a force sensitive unit intervening between the surface portion of the supporting block and the second surface portion of the top member and converting a force acting on the first surface portion into an electric signal, wherein the first surface portion is formed with a rugged surface which causes a striker to intermittently strike the first surface portion when the striker moves along the first surface portion.

Abstract: A portable drum sound simulator, especially suitable for carrying by the user, includes a pair of drumsticks containing electrical switches which are actuated by change in motion. The switches are connected to a trigger circuit which initiates operation of a drum sound generator every time a switch is closed. The drum sound signal after amplification drives a loudspeaker. The circuits and loudspeaker are all contained in a small portable case. In an alternative embodiment, a radio receiver is included, whereby the simulator is selectively used as an independent radio, an independent drum sound simulator, or combining the radio signal with the operator produced drum signals.

Abstract: A new automatic accompaniment apparatus for sequentially reading out at a predetermined tempo accompaniment pattern information, including interval shift information, stored in a pattern memory and then generating tones of a designated chord, designated by a chord designatin means such as a keyboard, based on the accompaniment pattern information, thereby performing an accompaniment performance. The new automatic accompaniment apparatus, when the interval shift information is read out, will play a chord which is constituted by shifting intervals of part or all of the constituting tones of the designated chord in place of the designated chord, thus enabling an accompaniment performance rich in variety to be played as compared with a conventional apparatus having a memory capacity equivalent to that of the present accompaniment apparatus.

Abstract: The present invention provides an automatic music playing apparatus for automatically playing music, the music being composed of consecutive segments. The apparatus is essentially composed of (a) a memory device for storing musical data corresponding to the segments; (b) a control unit to read the musical data of the segments in a predetermined order and start reading data of a preselected segment consecutive to the segment being read according to an instruction therefor; and (c) a musical tone generator for generating musical tone according to the musical data read by the control means.

Abstract: A triggering apparatus for triggering an acoustic drum synthesizer includes(a) a body attachable to the frame of an acoustic drum to transmit acoustic vibrations from the drum frame or shell, the body configured to pass a drum receiver rod,(b) dual transducer structures carried by the body to be responsive to the transmitted vibrations, to produce signals,(c) and circuitry connected to the dual transducer structures to process the signals, passing only a selected high frequency band of such signals to the synthesizer, to trigger same.

Abstract: A sequencer unit of electronic musical instrument including a plurality of sequencers each storing specific performance data which are generated by operating a keyboard in advance. In the case where an automatic performance is played based on first performance data of selected one sequencer and then second performance data of another sequencer are selected, the first performance data are smoothly changed over to the second performance data and then the automatic performance is played based on the second performance data at a desirable timing which can be arbitrarily determined. Even when the ending timing of performance data to be written in the sequencer does not match with the end of bar, the length of performance data read from the sequencer can be easily adjusted to predetermined bars. Further, it is possible to easily adjust a break period in which the automatic performance is broken so that keyboard performance can be played.

Abstract: A musical electric signal generated by electric signal generator 1 is supplied to a rhythm signal extractor 2 so that a rhythm signal is extracted. Interval data of rhythm signal peaks are stored in memory 3. Cycle detector 4 detects a musical rhythm cycle based on the interval data stored in the memory 3 and then provides a rhythm synchronizing signal in synchronization with the rhythm. The rhythm synchronizing signal is utilized as a control signal for moving portions of a toy.

Abstract: For use in or with an electronic musical instrument, an automatic accompaniment apparatus has a keyboard, a chord detector detecting a chord played on the keyboard, a judging circuit judging chord establishment of the detector chord, and a chord accompaniment tone generator producing, in accordance with an automatic rhythm pattern, chord tones for the detected chord when chord establishment is judged. This apparatus further comprises a tone generator for producing the tones of arbitrarily depressed keys when chord establishment is not judged. Thus, automatic accompaniment and manual performance are automatically selected according to the state of key depressions.

Abstract: In a musical tone generator system, rhythm pattern data are read out from a rhythm pattern memory so that the formation of the tone signal specified by the rhythm pattern data is controlled by allocating the tone signal to one of the tone signal forming channels of a signal forming circuit, which is thus enabled to output from each of the tone signal forming channels the tone signal specified by the rhythm pattern data with the result that a sequence of tones is automatically generated in accordance with the rhythm pattern data. When any one of the tone select keys is activated, the formation of the tone signal corresponding to the tone designated by the activated tone select key is controlled by allocating the tone signal to one of the tone signal forming channels. The tone signal forming circuit is now enabled to form in and output from each of the tone signal forming channels a tone signal which corresponds to the tone designated by the activated tone select key.

Abstract: Melody and chord tone data are read out from a melody RAM and a chord RAM under the control of address counters in a CPU, and are supplied to LSIs. The LSIs are controlled by the CPU for operation on a time division basis for a plurality of channels, so that a given melody and chord are simultaneously produced from a loudspeaker.

Abstract: An electronic tone generator generates a synthesized three tones signal of a main melody tone, a first accompaniment tone, and a second accompaniment tone. The electronic tone generator includes a main melody generation circuit, a first accompaniment circuit, and a second accompaniment circuit, each equipped with its own envelope circuit. A ROM is provided having stored therein information concerning key activation, tempo, melody, notes and timings. A mixing modulator synthesizes the signals output from the main melody generation circuit, the first accompaniment circuit, and the second accompaniment circuit.

Abstract: An automatic tone producing apparatus produces tones at a rhythmic alignment by reading a memory which stores a train of tones of various instruments aligned in sequence to be respectively sounded at different time points to constitute a predetermined length of musical progression. The alignment intervals are irrelevant to the rhythm to be reproduced. The memory includes a plurality of memory areas which are alotted to and store the respective tones, and each of the memory areas is comprised of memory portions to store wave sample data of the each alotted tone. The memory areas to be read out are sequentially designated at a rhythmic pattern of a selected tempo, and the wave sample data within the designated memory area are read out at a predetermined speed independent of the tempo. Thus the tones having live sound properties are produced at various tempos but retaining the pitches of the respective tones.

Abstract: In an automatic rhythm performing apparatus, pattern memory stores rhythm pattern data of respective rhythm patterns for respective rhythm instrument tones as identified by channel numbers. Selected rhythm pattern data are read out together with the channel numbers and are supplied to corresponding tone generation channels for respective instrument tones according to the selected rhythm kind. There is provided a rewritable data memory storing channel alteration data for altering the channel number included in the read-out pattern data to another channel number. The rhythm pattern data read out from the pattern memory are supplied, as modified by the channel alteration data read out from the rewritable data memory, to the tone generation channels of the alteredly designated channel number. The channel alteration data of the data memory are rewritten by the manipulation of keys in the performance keyboard, whereby the rhythm patterns of the instrument tones are easily altered.

Abstract: A portable drum synthesizer is described having a pressure sensitive transducer adapted to be struck by the hand or fingers. The transducer output is switched to the trigger input of one or more voice generating circuits by means of finger operated switches. Certain of the finger operated switches additionally control the pitch or other parameters of the one or more voice generating circuits. The one or more voice generating circuits are optionally contained within the portable synthesizer which can take the general form of a guitar.

Abstract: A system for selecting accompaniment patterns in accordance with which accompaniment musical tones are produced in an electronic musical instrument. The system includes a memory for storing a plurality of accompaniment patterns. A plurality of storage devices corresponding respectively to a plurality of operable members is provided. A select device is operable to select one of the accompaniment patterns to produce pattern identification data indicative of the selected accompaniment pattern. A writing device is responsive to an operation of any one of the operable members for writing the pattern identification data into one of the storage devices corresponding to the operated one operable member, thereby assigning the selected accompaniment pattern to the one operable member. A reading device is responsive to an operation of the one operable member for reading from the memory the selected accompaniment pattern.

Abstract: A novel capacitive pressure-sensitive sensing technique and apparatus wherein an elastomeric conductive electrode carrying a two-dimensional array of projections is pressure-deformed against a fixed coextensive cooperative electrode to generate signals, such as tones and sounds in the application to musical instruments, or visual representations, corresponding to the dynamic pressures applied over the two-dimensional surface. A novel drum-like and other musical instruments embodying such novel capacitive sensing techniques and the like are described.

Abstract: A rhythm tone source assigning apparatus for use in an electronic musical instrument comprises a memory having a plurality of storing regions corresponding to a plurality of input operating manipulators each being comprised of a keyboard key or a switch. Arrangement is provided so that by writing a tone source identifying datum corresponding to desired one of a plurality of rhythm tone sources in one of the storing regions corresponding to an input operating manipulator one after another, rhythm tone sources can be assigned to the plurality of input operating manipulators. Thus, this electronic musical instrument greatly facilitates its user of his performing or inputting operations in a hand percussion or a rhythm sequence programming by using these manipulators. This is, for each rhythm, the user is able to obtain his favorite convenient arrangement of operating manipulators.

Abstract: An improved dual-tone electronic music generator provides a phase difference between a melody and a chord such that the melody codes converted from the melody and the chord codes converted from the chord can be stored into a memory in series. This arrangement can increase the memory usage efficiency, and can reduce both the chip size and the production cost.

Abstract: A foldable electronic bass drum includes a base to be placed on a floor surface with a coupling device provided at a portion of the base for coupling a foot pedal with a beater. On a portion of the base remote from the coupling device, an arm mounting a pad to be struck by the beater at one end of the arm and an arm supporting device for pivotally supporting the other end of the arm are provided. The other end of the arm is fixed to the base by a fixing device so that the beater of the foot pedal can strike the pad. A vibration of the pad is picked up by a pick up device for converting a vibration of the pad into an electrical signal. When the foldable electronic bass drum is not used, the arm is released from the fixing device so that the arm is moved forward the foot pedal and laid on the base thereby establishing conveyance.

Abstract: An automatic rhythm performance apparatus comprises at least a rhythm pattern memory for pre-storing plural kinds of rhythm patterns, an ending switch and a rhythm tone source. The rhythm patterns correspond to rhythm performances such as the Latin American Music, the Rumba Music and the Tango Music. Each of these rhythm patterns comprises one normal pattern and at least one ending pattern. Normally, the rhythm tone source generates rhythm tones in accordance with the normal pattern which corresponds to a normal part of a tune. When the ending switch is manipulated, the rhythm tone source generates other rhythm tones in accordance with the ending pattern, so that an ending rhythm performance is executed from a start timing determined by the manipulating timing of the ending switch. When each rhythm pattern consists of two ending patterns, the ending rhythm performance is executed in accordance with selected one of the ending patterns.

Abstract: A foot-operated, bass drum pedal assembly is provided, and it includes: a base in the form of a metal plate, a first drum beater, a support for the beater mounted on the base, and a pedal pivotally mounted to the base and operatively connected to the beater to pivot same as the pedal is pivoted by the drummer's foot, and structure located proximate the pedal to sense downward movement of the pedal to predetermined downward position, and to produce an electrical signal usable to effect production of phenomena corresponding to a drum beat.

Abstract: An electronic stringed instrument includes a mode selecting section for selectively setting a normal play mode and at least one other selection mode. When picking of a string under a pitch designation operation status is performed after the normal play mode is selected by the mode selecting section, generation of a musical tone with the designated pitch can be started. When picking of a string also under the pitch designation operation status is performed after another selection mode is selected by the mode selecting section, a desired musical tone parameter such as a timbre corresponding to the designated pitch or a rhythm pattern can be easily set. The content of the set musical tone parameter can be confirmed by a sound.

Abstract: A pedal operated electronic drum. The electronic drum includes a pedal pivotally coupled to a base and a first striking or anvil element mounted on the base. A second striking or hammer element is operably coupled to the pedal so that depression of the pedal causes the hammer element to strike the anvil element. A transducer is acoustically coupled to the anvil element to convert impact induced vibrations in the anvil element into an electrical output signal. In one embodiment the hammer element is attached to a roller pivotally coupled to the base. A strap is wrapped about the roller and attached to the base so that depression of the pedal rotates the axle thereby causing the hammer element to strike the anvil element. In an alternative embodiment the strap is coupled to the pedal instead. Both of these embodiments may be adjusted to simulate the "feel" of a conventional pedal operated drum striking element.

Abstract: An automatic accompaniment apparatus includes an accompaniment pattern generation unit for generating a plurality of accompaniment patterns which represent timing of generation of a plurality of accompaniment tones to be generated respectively. The accompaniment patterns correspond to accompaniment tones.

Abstract: A plurality of drum pads are each provided with a respective piezoelectric pick-up. The output of each piezoelectric pick-up is fed to a corresponding envelope-extracting circuit. The envelope signal extracted by the envelope-extracting circuit is converted by an A/D converter into a digital signal which is fed to a CPU. The CPU feeds a tone designation signal to a tone generator unit according to parameter data from a parameter data setter and the digital signals noted above, thereby causing generation of a corresponding drum sound.

Abstract: There is provided a selection switch for selecting musical information determining characteristics of a tone such as a tone color. This selection switch is pre-assigned with first musical information. Switches and circuits are provided for assigning second musical information to the selection switch. This second musical information is one selected as desired from among plural musical information. Thus, at least two musical information of the pre-assigned first musical information and the selectively assigned second musical information are assigned to the selection switch. There is also provided a mode selection switch. When a first mode has been selected by this mode selection switch, a characteristic of a tone to be produced is determined by the first musical information. When the second mode has been selected, a characteristic of a tone to be produced is determined by the second musical information.

Abstract: For use in or with an electronic musical instrument, an automatic rhythm performing apparatus is so constructed as to provide selectively automatic performance of various kinds of rhythms using tones of a plurality of rhythm section instruments. Each rhythm is constructed with a plurality of instruments, which are divided into several families. Plural rhythm patterns are provided for each of the rhythm instrument tones which constitute one kind of rhythm. Any one of the rhythm patterns is selected for each instrument, and such selection is available individually family by family of the instruments. Thus a variety of automatic rhythm performance can be realized with small scale pattern memories and simple selecting operations.

Abstract: An electromechanical vibrator driving device comprising a rhythm signal generator to produce rhythmic pulses in a pattern corresponding to a beat pattern of a selected music rhythm, the rhythmic pulses being amplified and then applied to the vibrator so that the vibrator generates a rhythmical vibration of the selected music rhythm. The rhythm signal generator comprises a rhythm pattern generator storing different rhythm patterns and providing pulses corresponding to strong beats and pulses corresponding to weak beats in a selected rhythm pattern, separately. The strong beat pulses and the weak beat pulses are processed by attenuators to have different amplitudes and are mixed to produce the rhythm signal.