Abstract: A desired rhythm instrument tone color can be assigned to a pad type performance operator. A desired type of repeated-tone mode, e.g., roll, flam or echo, can be selected by a switch operation or other suitable means. Upon operation of the performance operator, repeated tones having a rhythm instrument tone color assigned to the performance operator are generated with a stroke pattern having a characteristic peculiar to the tone color.

Abstract: An electronic musical instrument with an automatic performance function includes manual performance device, an automatic performance device and a control. The manual performance device, having a plurality of performance manipulators to be performed by a player, generates a manual performance musical tone having a tone color in response to the player's performing. The automatic performance device automatically generates automatic performance musical tones of a plurality of parts respectively corresponding to a plurality of tone colors. The control, in response to generation of the manual performance musical tone.

Abstract: An electronic musical instrument has an automatic playing device which conducts an automatic musical performance at a tempo set by manually tapping of a pad before the beginning of the performance. The automatic playing device also starts the automatic performance based on the detection that the number of the tapping has coincided with the predetermined number. The tempo is set according to an interval between the successive tapping. The successive taps can be the latter two taps when the tapping is made for a number of time of music. Also, the electronic musical instrument is equipped with a tap voice output device that outputs counting voices, such as `one`, `two`, `three`, for each tapping.

Abstract: An automatic melody composer composes a melody on a phrase by phrase basis. A phrase database storage stores data of many and various phrases. A generating index database storage stores records of music generating index. Each record describes or indicates appropriate phrases in the phase database and how melody is modified or developed in moving from one musical time unit to another. A decoder selects an index record from the generating index database, retrieves, from the phrase database, phrase components according to the index record, and combines them into a phrase. Thus, the composer quickly provides a natural melody formed with a chain of phrases without requiring complicated data processing.

Abstract: An electronic musical instrument has a keyboard and a sound source circuit for manual performance along with automatic accompaniment. A memory is provided for memorizing a plurality of rhythm patterns of the automatic accompaniment such as introduction, normal, fill-in and ending. The memory further stores timbre codes corresponding to the respective rhythm patterns, effective to specify tone color of the manual performance. Selecting switches are manually operated during the manual performance for selecting a desired rhythm pattern. A CPU accesses the memory to retrieve the selected rhythm pattern so as to switch the automatic accompaniment to the selected rhythm pattern. The CPU concurrently controls the sound source circuit to change the tone color of the manual performance according to a particular timbre code associated to the selected rhythm pattern.

Abstract: An automatic playing apparatus which reads tone information from a ROM piece by piece to play a demonstration. The tone information stored in the ROM includes note data for generation of a musical tone as well as data for changing the parameters of music corresponding to the note data. When a demonstration is played, the note data and the data for changing the music parameters stored in the ROM are read out piece by piece, and the associated musical tones are generated accordingly. In this way, the musical piece being automatically played changes with each repetition, so that listeners hear a different version of the piece each time it is re-played.

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: An automatic performance apparatus for sequentially reading out performance data sequentially stored in a performance data memory to execute automatic performance, detects depression of a step forward key, and generates a tone for a predetermined time T.sub.3 on the basis of performance data in the performance data memory designated by an address pointer. When the step forward key is depressed again within the predetermined Time T.sub.3 from its first depression, the same performance data tone is continuously generated for the predetermined time T.sub.3 from the second depression timing of the step forward key. When the step forward key is continuously depressed for a predetermined time T.sub.2 or more from its first depression timing, the address pointer is stepped up upon each predetermined time T.sub.1 to generate a performance data tone sequentially designated by the address pointer. According to this automatic performance apparatus, automatic performance data can be rapidly edited by simple manipulation.

Abstract: An electronic rhythm instrument having two or more rhythm switches which correspond to rhythmical sounds, and which generates rhythmical sounds corresponding to the rhythm switch operated. In the electronic rhythm instrument, one of the rhythmical sounds can be assigned commonly to a plurality of the rhythm switches, and further, a tone pitch and/or a tone volume can be assigned to each rhythm switch to which one of the rhythmical sounds is assigned commonly when a primary mode is selected. After the assignment, when a secondary mode is selected and one of the rhythm switches is operated, the preassigned rhythmical sound having the tone pitch and/or the tone volume assigned to the operated rhythm switch can be generated. The present invention can assign a tone-pitch scale and/or a tone-volume scale to a number of rhythm switches. When the tone-pitch scale is assigned to the rhythm switches, a melody can be produced according to the tone-pitch scale.

Abstract: An automatic playing apparatus according to the present invention, stores, in an automatic playing pattern data memory, chord, bass, drum data for each of a plurality of intro, normal and ending patterns, and drum data for each of a plurality of fill-in patterns, and reads, when a fill-in is selected via an operation panel, chord data and bass data, stored for an intro, normal, or ending pattern data, and drum data, stored for a fill-in pattern, to perform automatic playing. Further, an automatic playing apparatus according to the present invention includes an automatic playing pattern data memory wherein loud fill-in pattern data and soft fill-in pattern data are stored, sets an intonation value using an intonation dial as the performance is developed, and performs automatic playing based on either loud fill-in pattern data, if the intonation value is equal to or greater than a predetermined value, or based on the soft fill-in pattern data, if the intonation value is smaller than the predetermined value.

Abstract: An electronic percussion system having the look, feel and response of an acoustic drum is provided by a combination of a drum body shell, conventional drum heads held at adjustable tension across open ends of the shell, and within the interior drum cavity a sound-to-electrical transducer is embedded in layers of rubber foam filler material. The sound energy attenuating characteristics of the foam filler material prevent the transducer from being falsely triggered by ambient sound exterior to the drum, by sympathetic vibrations of the drum, and resists false triggering due to lightly, inadvertently hitting the drum stand.

Abstract: A musical tone control apparatus controls a musical tone corresponding to a movement itself of an object and the like which is detected by a detector Such detector detects also a moving speed, a moving force, a moving angle or an intensity of given impulse of the object. In the case where the detector is mounted in the vicinity of a player's joint, the detector detects a revolving or bending angle of the player's joint. Hence, the musical tone can be controlled based on such angle of the player's joint. Thus, through this musical tone control apparatus, the player can generate a musical tone having, for example, a desirable tone pitch, a desirable volume and a desirable tone color based on the movement of the object or the player's joint.

Abstract: Header control data for setting various characteristics of an automatic performance tone such as tone color, tone volume, tempo, effect and the like are stored in a header portion of a memory. The header control data are loaded into a buffer register, and various characteristics of an automatic performance tone to be generated are established on the basis of the header control data stored in the buffer register. In response to activation of a changing operator, the header control data in the buffer register are changed and a hence various characteristics of the automatic performance tone to be generated are changed. When the data in the buffer register is changed during an automatic performance, the header control data stored in the memory is changed in correspondence to the change.

Abstract: The electronic musical instrument is provided with an accompaniment pattern memory storing a prescribed automatic accompaniment pattern composed of, at least, a chord tone part and a rhythm tone part, a keyboard manually operable to generate a command to designate temporary elimination of the chord tone part from the automatic accompaniment, a CPU responsive to the command from the keyboard to inactivate the chord tone part in the automatic accompaniment pattern, and a sound source circuit for performing the rhythm tone part of the automatic accompaniment pattern while inhibiting generation of the chord tones.

Abstract: An electronic musical instrument, in which a phrase for about one bar is assigned to each of keys across two octaves, a note data string of each phrase is read out from a memory in accordance with a one-finger key operation, and corresponding tones are generated. Key numbers, key depression velocities, and key depression timings of a series of key operations in a phrase play mode are recorded in a recording medium. In a playback mode, a note data string of a phrase corresponding to a playback key number is read out from the memory. Tone generation strength data in the note data are multiplied with the playback key depression velocity, thus obtaining a modified note data string. Playback tones of a phrase play close to an actual play can be generated by modifying key depression strengths of phrase tones pre-programmed in the memory.

Abstract: An electronic keyboard instrument includes note data memory (35) for storing note data strings of a plurality of different short phrases, and a tone generator (37) for generating tones on the basis of a note data string read out from the note data memory (35). In response to a key depression operation, a note data string of a short phrase assigned to the ON key is selected and read out. Tone strength data of the readout note data string are multiplied with a key operation strength value, and product data are output to the tone generator (37). A player performs an adlib play upon a combination of the phrases. The tone volume can be controlled in units of phrases according to key touch data.

Abstract: The cymbal system comprises a cymbal member mountable on a cymbal stand, the cymbal member having a playing feel approximating that of a conventional cymbal. A transducer is affixed to a surface of the cymbal member for translating any substantial percussive impact on the cymbal member to electrical signals. These electrical signals are converted into MIDI "note-on" messages serving as trigger messages. At least one conductive element is mounted on the cymbal member. A MIDI interface system is included which detects the alternation in an electrical signal between two stable states in response to a user's manipulation of the conductive element, each stable state representing a digital signal. The MIDI interface system also includes a software system for recognizing and then interpreting the digital signal into MIDI SYSEX messages, or note off and note on messages, serving as MIDI choke/send messages.

Abstract: An auto-play electronic musical instrument stores note data of phrase tones for one bar corresponding to each of a plurality of keys of two octaves together with auto-accompaniment pattern data. Every time a key is operated, an adlib play is made by playing back corresponding phrase tones. When a key operation is interrupted during the adlib play, specific phrase tone are repetitively and automatically played back, thereby preventing a play from being interrupted halfway. The electronic musical instrument also stores fixed phrases such as introduction, fill-in, ending phrases, and the like, which are required according to the flow of a play. When one of the fixed phrases is played back by a selection button while the specific phrase is repetitively played back, the repetitive playback operation of the specific phrase is restarted when the playback operation of the fixed phrase ends. As a result, a user can play similar to a professional artist even with one finger in this key-on phrase play mode.

Abstract: An automatic musical editing apparatus is presented which permits easy and efficient alterations of tone generation timing while listening to a musical score. The apparatus employs a CPU 1 which controls the overall function of the apparatus according to the steps stored in memories, and interfaces with the various sections through a bus B. The RAM memories are used to store rhythm pattern data, including a header region HD for storing temporary data, followed by a duration data to specify the generation timing for the first tone DU1, followed by an event data IV1 to specify the first tone. The remaining tones are stored in the same alternating pattern of timings and corresponding tones. The end of the rhythm pattern is indicated by the end data ED.

Abstract: When a tap switch is operated at desired beats during automatic music play, the tempo of the automatic play is variably controlled in correspondence with the interval between the tap operations. On the other hand, detection is made of a difference between the current score time at a tap switch operation time and the score time of a beat point corresponding to the tap switch operation time. Then, control is made for progressively changing the current score time in order to eliminate the detected score time difference. Thus, the score time difference is progressively eliminated in smooth manner, so that necessary notes can be sequentially sounded without being left out. The control for progressively changing the current score time may be performed in accordance with a predetermined function. Further, the control for progressively changing the current score time may be performed with a characteristic such that it is automatically changed in view of the number of notes in the automatic play.

Abstract: Changes in vibratory position of a batter head of a percussion are detected to output a decay vibration waveform by a detector. A tone source controller sequentially generates a plurality of tone source control codes on the basis of the decay vibration waveform data along time lapse. A tone source circuit controls a reading operation of digital waveform data of percussion tones stored in a waveform memory, and modification of readout data on the basis of the tone source control codes, to generate a tone waveform signal.

Abstract: An electronic musical instrument with pads is provided with a plurality of pads, a pad operation detection device, and a chord data generation device which generates specified chord data corresponding to a pad when the pad has been operated a second time within a specified time. Since chord data previously corresponds to each pad, if a player operates a pad two times within the specified time, chord data corresponding to that pad is generated. This chord data is provided to an accompaniment playing device and accompaniment playing is performed.

Abstract: An automatic accompaniment playing device comprising a memory for storing various normal rhythm patterns, switching devices for selecting any one of said normal rhythm patterns from said memory to play the same at a predetermined tempo, a settable control unit for generating a first information regarding the magnitude of tempo variation of said predetermined tempo and for generating a second variation; the device furthermore comprises control registers for gradually changing the tempo of said rhythm patterns based upon said first and second informations provided by said control unit.

Abstract: An auto-play musical instrument, which can give a tone-up state of a music piece intended by a player at his or her intended timing is disclosed. When a rotational speed detector (60) detects that a dial (10) is rotated at a speed higher than a predetermined speed, a director (63) directs a pattern selector (65) to select a soft fill-in pattern or a loud fill-in pattern in place of increment/decrement of an intonation value by a value changer (64). An auto-play operation is made based on the selected pattern, thereby sharply changing the tone-up level of play tones.

Abstract: An electronic metronome includes an adjustable oscillator driving a first frequency divider, a crystal time base driving a second frequency divider for generating a pair of audible frequencies, a standard pitch frequency and reference (time base) frequencies, a frequency counter coupled to the output of the adjustable oscillator for counting the output of the adjustable oscillator, a digital display and display stabilizer circuitry for displaying the count of the frequency counter, a gate driven by the first frequency divider for programmably serially selecting one of the pair of audible frequencies at a rate determined by the output of the frequency divider, a selector switch, three visual indicators, and a programmable counter coupled to the selector switch and visual indicators for providing various sequential time signature displays and an audio amplifier and speaker for providing an audible beat patterns.

Abstract: In a case where a fill-in pattern is temporarily inserted during an automatic performance, not only a main pattern to which the performance pattern should be shifted but also a main pattern which has been performed immediately before are taken into account and a fill-in pattern is automatically determined in accordance with a combination of the two main patterns. In a case where an introduction pattern is inserted at the beginning of the automatic performance, an introduction pattern is automatically determined depending upon which main pattern is performed after the introduction performance. In a case where an ending performance is inserted at the end of the automatic performance, an ending pattern is automatically determined depending upon which main pattern has been performed immediately before the ending.

Abstract: A foot pedal initial height adjustment for the foot pedal of a high hat stand. The foot pedal operates an operating rod which moves the movable cymbal down to contact the stationary cymbal. A spring biases the movable cymbal, its operating rod and the pedal upwardly. A connecting element in the form of a lever or wheel is connected on the one hand with the pedal and at a spaced away location is connected on the other hand with a pedal height adjusting member. The connecting element is also connected to the stationary body of the stand. The pedal height adjusting member is adjustable in length, e.g., by being comprised of two toothed rack holding arms whose relative overlapping lengths is adjustable. The adjustment of the length of the pedal height adjusting member determines the initial position and orientation of the connecting element which sets the initial height of the pedal, before the movable cymbal is moved toward the stationary cymbal.

Abstract: An apparatus for electronically connecting a plurality of percussion instruments having individual connecting leads to a mixing desk or the like comprises a rack surrounding at least partially the plurality of percussion instruments wherein the rack is provided with sockets for receiving the individual connecting leads from each of the percussion instruments and is further provided with a single connection cable for connecting the rack to the mixing desk.

Abstract: A sound generating device for generating a variety of sounds has a main control circuit which includes a ROM for storing melody data. A sound source is coupled to the control circuit in accordance with sound scale data stored in the ROM. The sound source has a waveform memory for storing a sound waveform in a digital form. The sound waveform memory is read at a frequency corresponding to the sound scale data. An envelope waveform memory stores an envelope waveform in a digital form. A digital to analog conversion circuit converts the digital envelope waveform in accordance with the digital sound waveform to produce an analog voltage.

Abstract: An electronic musical instrument provides a keyboard providing plural keys, memories for storing necessary programs and data, a musical tone signal generating circuit providing plural channels and a control unit such as a micro computer. A melody tone is designated by depressing a melody key within the keyboard. Then, an additional tone is automatically generated in relation to the melody tone by executing the programs, wherein its pitch, volume and tone color are controlled by the control unit. The melody tone and additional tone are assigned to desirable channels, from which the melody tone and additional tone are generated at different phonic positions. By varying the number of forming pattern of additional tones, it is possible to carry out the performance full of variety. Preferably, the additional tone is selected identical to a chord constituent note within a chord designated by performing the keyboard.

Abstract: The musical tone control apparatus includes at least a sensor for detecting a movement of a player and a control circuit for controlling a tone element of a musical tone to be generated based on the detected movement of the player. The sensor may be equipped within a stick or mounted at predetermined portion of the player. As the movement of the player, the sensor can detect a swinging angle of a player's arm, an acceleration applied thereto or a distance between a player's hand and a predetermined object such as a wall. As the tone element of the musical tone, the control circuit controls a tone color, a tone pitch or a tone volume of the musical tone.

Abstract: A rhythm performance apparatus comprises a memory, ten-key pad or selection switch, drum pads or operation member, and a CPU. The memory has a plurality of rhythm pattern storage areas, including at least one write enable area, for sequentially storing rhythm tones designated by instrument number data and an optional parameter such as a touch data and an instrument localization data in units of tone generation timings. The ten-key pad or selection switch is used for designating a desired storage area and one of the write enable areas. The drum pad and the operation member are used for designating an instrument number and a touch. The CPU copies an optional parameter of the designated instrument number in the designated storage area to the designated write enable area as an optional parameter corresponding to the designated instrument number in the designated write enable area.

Abstract: Plural normal pattern data, plural introduction pattern data, plural fill-in pattern data and plural ending pattern data for each of various accompaniment styles such as march, waltz and rock are stored in a memory. Relation of correspondence among these pattern data is predetermined and, at transfer from one pattern to another such as transfer from a certain introduction pattern to a normal pattern, transfer from a certain normal pattern to a fill-in pattern, transfer back from the fill-in pattern to the normal pattern or transfer from a certain normal pattern to an ending pattern, predetermined pattern data which corresponds to a pattern which has been so far performed is automatically determined and transfer to the determined pattern is automatically made. Transfer of the pattern which is automatically determined can also be changed as desired by selection by the player.

Abstract: A telescoping stand combining mechanical memory with integrated internal electrical wiring with plug-in connectors. The stand is equally suitable for mounting various electro-mechanical devices including, but not limited to, musical drums (electric or acoustic), lighting fixtures, displays, consoles, keyboards, and other items or devices where repetitious precise mechanical positioning with integral internal electrical connections is required. Once initially set up, the stand can be locked for height and rotation (vertical and horizontal, or radial, angular, and polar) and is then ready for disassembly and subsequent re-assembly and connection to external electrical circuits after which re-assembly the precise mechanical positioning of the mounted devices will be restored.

Abstract: An acoustic control apparatus which can be applied to an electronic musical instrument controls the acoustics of a musical tone to be generated in response to variation of an image. In order to detect the variation of an image, the acoustic control apparatus extracts a predetermined image element from image information to be given thereto. This image element can be identified as movement of image, color of an image or an outline of image. The color of image can be detected by detecting hue and/or number of colors in the image. In addition, in response to periodicity in variation of this image element, a performance tempo of musical tone can be controlled.

Abstract: A motif performing apparatus for use in an electronic musical instrument, which effects an automatic performance of a motif only while sounds are being radiated. The motif performing apparatus is able to store information representing motifs to be played, and to read and output information representing each of the motifs, separately, while instruction units for instructing a radiation of musical sounds are operated. Accordingly, even if the operation of an instruction unit is unchanged, the performance is varied according to a pattern of the information. Further, as long as the instruction unit is operated, a plurality of musical sounds are generated automatically and sequentially according to the pattern of the information, and thus a performance can be easily effected.

Abstract: An information processing apparatus includes: a unit for displaying on a screen a musical score, keyboard and tone time information to be inputted; a unit for designating the position of the keyboard, and tone time information, respectively displayed on the display unit; a unit for storing musical information produced through designation by the designating unit of the position of the keyboard and tone time information displayed on the display unit; a unit for controlling the display of the musical score, keyboard and tone time information on the screen of the display unit, and for controlling the display of a pattern of musical tone or rest on the musical score on the display unit in accordance with the position of the keyboard and tone time information respectively designated by the designating unit; and a unit for generating a musical tone by reading the musical information stored in the storage unit.

Abstract: A computerized musical instrument system has a processing system for converting multiple modes of music data input into relative rhythm coded data in the format of pitch codes and relative rhythm codes for designating respective types of rhythm elements, including the pitches, as they occur in the beats or other basic music intervals of a music piece. The relative rhythm codes represent the relative proportions by which the designated rhythm elements divide each beat. In a relative rhythm coding mode, pitch and rhythm data are entered via a keyboard and relative rhythm code and control code keys. The music data may also be input in the form of MIDI formatted data, audio or digital sound input, real-time performance (keypress) data, or optically scanned data from printed music notation. The instrument system can provide various forms of outputs including synthesized sound, a display or music notation, stored music data, printed output, and related audio and/or image effects.

Abstract: A rhythm pattern generating apparatus is provided having a layered neural network to perform learning with feedback to generate an output pattern signal indicative of a musical sound pattern. The output pattern signal is generated by the layered neural network with feedback in response to a performance operation of a player. The layered neural network generates the output pattern signal indicative of the musical sound pattern based on both an input pattern signal and a weight signal. The output pattern signal is fed back by the feedback circuit to the layered neural network to perform the learning process. A drum pad can be used to provide an input to the rhythm pattern generating apparatus or, specifically, to gate an input pattern selector for selecting input pattern signals. The layered neural network with the feedback can perform the learning process using a back propagation method.

Abstract: A rhythm play control device for an electronic musical instrument stores the number of operations of a single operator, and includes a memory device and a central processing unit which responds thereto to perform a change of play mode of the instrument.

Abstract: Transducer device (12) for drums including a head structure (18) mountable to a drum by means of a mounting structure (20). The head structure includes a piezo electric transducer (24) clamped between metal plates (26, 28), plate (26) forces against the drum skin (16) by application of force through the mounting structure (20). The force is applied to a plate (34) forming part of the head structure (18) which is acoustically isolated from the transducer (24) by an isolating element (36) positioned between the plates (34) and (28). Electrical output is taken via a cable (36) to a preamplifier (74).

Abstract: A musical performance data reproduction appparatus for reproducing stored performance data compensated with a just-beat function. A clock generator generates a clock proportional to a given tempo. A clock counter counts the clock to output incremental clock data. A clock converter converts the incremental clock data into reproduction clock data with a nonuniform increasing rate. The performance data is then reproduced based on the nonuniform reproduction clock data and a time base of the reproduced performance data is expanded/compressed so that reproduced tones are just-beated with respect to a reference beat time.

Abstract: An electronic musical instrument is disclosed in which the selection of timbre and rhythm contol functions is simplified, and the number of function switches and control panel surface area can be limited, even when the instrument has a large number of available timbre and rhythm control functions. The invention provides an electronic musical instrument employing various types of musical tone control data which are divided into groups. Additionally, the invention provides an input device which includes a plurality of switches, each switch corresponding to one of the above described groups of musical tone control data. The input device is capable of detecting the operation of the above mentioned switches.

Abstract: A drum assembly comprising: a center drum pad; first, second, third, fourth, fifth, and sixth peripheral drum pads arranged in encompassing relationship about the center drum pad; electronic percussion synthesizer operably connected to each of the drum pads for producing predetermined percussion sounds in response to the striking of the drum pads.

Abstract: A recorded music enhancement system (RMES) utilizing a recording media such as audio tape or compact disc with a separate track for a control waveform or digital code which controls secondary stimuli, such as pulsing lights, so that they pulse in time with the music, or are otherwise coordinated with the music in some artistic arrangement. This system has a triac to switch the power on and off to the lights or other secondary stimuli, and includes a tone or digital code detector which receives the input waveform from the extra track on the recording medium and operates the triac as a function of the input waveform, in essence causing lights or other stimuli to reproduce the rhythm variations of the music as it is played from the tape or other recording medium.

Abstract: An automatic performance apparatus provides a performance data memory including plural storing areas each capable of storing different performance data independently. The performance data can be selectively written in and read from each storing area. Based on the performance data read from each storing area, a musical tone signal for an automatic performance is generated independently. When the performance data memory includes two storing areas, the performance data concerning two tunes or two parts can be stored. One of two automatic performances based on the performance data can be selectively played. In addition, two automatic performances can be also player simultaneouly, wherein a predetermined delay time can be provided between two automatic performances. Further, predetermined kinds of rhythm patterns are pre-stored in a rhythm pattern memory in order to perform the desirable rhythm pattern as an accompaniment of the automatic performance.

Abstract: An electronic musical instrument capable of reporting a sound level and a tempo to be set. When a particular sound level or a particular tempo is selected and set, a click having a particular pitch matching the sound level or the tempo is generated to allow the user to recognize the sound level or the tempo on the basis of the pitch of the click. The instrument has a right and a left loudspeaker and, when the sound level is high or the tempo is fast, produces louder sound from one of the loudspeakers while, when the sound level is low or the tempo is slow, producing louder sound from the other loudspeaker.

Abstract: A floating metallic striker plate with a transducer positioned by selective antinode alignment at the resonance point of the striker plate, i.e., the point of greatest vibration. A thin disk made from a plastic laminate or wood veneer is positioned at the bottom of a metallic shell and held in place by a locking rim. A metallic bottom plate is placed on top of and attached to the disk. An isolation ring and isolation foam disk are attached to the bottom plate. The metallic striker plate is attached to the isolation ring and interior surface of the shell by silicon adhesive. A flat transducer with electrical connections to a jack in the side of the shell is attached to the striker plate undersurface at the plate's resonance point. A pure gum rubber disk is attached to the striker surface of the striker plate.

Abstract: A automatic composer automatically forms a rhythm pattern. Reference rhythm patterns representing a sequence of a plurality of tone durations are generated, and a pulse scale source provides a pulse scale of pulse points having weights for joining or disjoining tone durations, depending on their positions. The reference rhythm pattern is modified by executing one of joining or disjoining tone durations in accordance with the pulse scale. Also disclosed is an automatic composer for composing an entire musical piece, wherein featuring parameters are extracted from an inputted portion of a musical piece, and an entire musical piece is composed in accordance with at least the extracted featuring parameters. According to a preferred arrangement, the featuring parameters are extracted in accordance with at least one of a sequence of tone pitches and a sequence of tone durations, the sequences defining the inputted portion of the musical piece.

Abstract: An auto-accompaniment apparatus for an electronic musical instrument which includes an accompaniment pattern storage means and chord progression pattern storage means. These accompaniment pattern and chord progression pattern are programmed in the storage means for each type of rhythms. Accompaniment pattern data and the chord progression pattern data are read out from the storage means in response to selection of rhythm. A modifier modifies accompaniment notes in the accompaniment pattern data in accordance with programmed chord name in the chord progression pattern data. A tone generator generates accompaniment tones on the basis of the modified accompaniment notes.