DE2111505A1 - Device for automatic rhythm sound generation - Google Patents

Description

PATENT LAWYERS? 1 1 1 R D R

CHECK ACCOUNT: MUNICH 91139

BANK ACCOUNT: BANKHAUS H. AUFHÄUSER

4 / Li

Case 45774-2

Uippon G-akki Seiao Kabushiki Eaisha, Hamamatsu. Japan

Device for automatic rhythm sound generation,

The invention "relates to a gate direction for automatic ti Rhythmic generation, and particularly such a device; which is for the use "with an electronic load-mus ik ins tr urn e i gne t.

In the case of electronic keyboard musical instruments, e.g. electronic organs, a type has recently been particularly preferred which contains a device for automatic rhythm sound generation which has a rhythm section in order to record the beating sounds of cymbals, drums, cowbells or timpani, or the tones of the melody, the chords or deü bass or combinations thereof in exact timing with a rhythm which is as sB march, Rumba, Tango, Samba, Walser and Bossa Nova selected from various rhythm tempos or patterns, _t playing.

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_ 2 -

J \ ig. 1 is a sctiematiscb.es circuit diagram of a conventional, electronic keyboard musical instrument, in v / elcheui the above mentioned type of device for automatic rhythm sound generation is included. The main device of the musical instrument consists of an organ section 16, the one

Keyboard 12 with a variety of 'keys H ₁ , 11 ₂ H _n *

which are arranged in the order of the musical notes, a key holder 13 which is connected to the keys 11 - of the keyboard 12 and is provided with a plurality of key switches which are actuated when the corresponding keys are selectively depressed, tone generators 14 which are so constructed, that they can generate tone signals with pitch preselected by the respective keys and, when the key switches are selectively operated, generate the corresponding tone signals, and includes Klawtjfarbenfilter 15, which are built so that they generate musical sounds with the desired timbre from the tone signals. The device for automatic rhythm sound generation, on the other hand, consists of a rhythm section 25 with a combination pulse generator 22, which is formed from a time-clock pulse generator, which is followed by a frequency-dividing counter chain for selecting a desired rhythm from the various types of rhythm patterns, and v / which is operated by a normally open switch 21, which is manually closed at the beginning of rhythm play, with a timing pulse encoder x '23, which consists of a suitable logic circuit including diodes in an array to selectively generate a series of timing pulses accordingly Form a desired rhythm pattern to the combination input pulses supplied by the generator 22, and generate with rhythm sound generators 24, ura Rhythrjusklangsinnale su, which are triggered by the timing lupulse. The resulting output signals from sections 16 and 25 are generated via separate volume controls VRj or VR ₂ and a common amplifier A (which can be provided separately).

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directs to a speaker S (which is provided separately can be) to be reproduced.

However, if desired, both the notes of the melody, the chords or the bass or combinations thereof from the section 16 as well as the rhythmic sounds from section 25 have the conventional instruments with a built-in device of the type mentioned above for automatic Generation of the rhythm sound has the disadvantage that not only a troublesome operation of operating the start switch 21 for the Rhythm sound play in addition to the selective depression of a desired key on the keyboard 12 for the Husikton " play is required, but that there are also considerable difficulties in the exact timing of the start of the rhythm sound game ens with that of the Husiktonspielens occur.

Much more, the known musical instruments, which are generally constructed to play as wide a variety of playing styles as are possible with full use of both hands and feet of a player, have the pocket portion that when added to the above rhythm section 25 are equipped, the player is prevented from playing such a variety of styles, since the operation of the start switch 21 is required. i

The aim of the invention is therefore a device for automatic rhythm sound generation for use in a electronic keyboard musical instrument and the automatic synchronous start of rhythm sounds with the ordinary ones Allows melody tones or accompaniment sounds, thereby always playing the rhythm sounds from the rhythm section precisely timed with that of the musical tones from the organ section and playing in a far greater variety causes.

For this purpose, according to the invention, a device for automatic generation

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generation of rhythm sounds provided in an electronic Keyboard musical instrument for playing the. ordinary 'tones of melody, chords, or bass, or combinations of these at the selective depression of a large number of keys arranged in the order of the musical notes, this gate direction being one Combination pulse generator, which consists of a time pulse generator, followed by a frequency-dividing counter chain is formed to combine pulses when selectively depressing of the buttons to generate. The outputs of the various counter stages are fed to a time pulse encoder, to generate a series of selected timing pulses representing the desired rhythm pattern and the outputs from the encoder are fed to individual rhythm sound generators, making the selected rhythm sounds simultaneously start with the beginning of the melody or chord or bass notes.

Next are in this inventive device for automatic Rhythm sound generation normally open switches for each of the different key levels, e.g. the upper, lower and pedal keyboard, and such. that is common to all Key steps used are provided, and all key actuation mechanisms are provided are connected to the combination pulse generator via the switches, creating the desired rhythm sounds either at the start of play or at any desired time during play in the selective Depressing the keys of any or all key levels can be played.

The following are preferred embodiments of the invention For example, explained in more detail with reference to the accompanying drawings.

Fig. 1 is a schematic circuit diagram of a known device for automatic rhythm sound generation,

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Polygamy "used in an electronic keyboard musical instrument will.

ffig. Fig. 2 is a schematic circuit diagram of a keyboard electronic music instrument provided with an automatic rhythm sound generation device according to an embodiment of the invention.

ffiff. 5 shows a specific circuit arrangement of the trigger generator and the combination pulse generator from FIG. 2 represents.

ffig. Fig. 4 is a schematic circuit diagram of an automatic rhythm sound generation device according to another embodiment of the invention suitable for use with an electronic keyboard music instructor.

ffig. Fig. 5 is a schematic circuit diagram of an automatic rhythm sound generation apparatus according to yet another embodiment of the invention suitable for use with an electronic keyboard musical instrument.

ffig. Fig. 6 is another schematic circuit diagram of the main part of the connection between the keyboard and the rhythm generator according to the invention.

ffig. Fig. 2 is a schematic circuit diagram of an electronic keyboard musical instrument provided with an automatic rhythm sound generation device according to an embodiment of the invention. The organ section 36 of the instrument comprises various keyboards 32, for example an upper, a lower and a pedal keyboard, which have a plurality of keys 31- «, 31p ····. 21 _η »arranged in the order of the musical notes; further key circuits 33 having a plurality of key switches provided for the respective keys 31-j to 31 _{n of} the keyboards 32 so as to be operated by being connected to the respective keys when they are selectively depressed; Further

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Tongeiieratoren 34 which are built to give sound signals Use to generate the pre-selected pitches for the individual loads and only sound signals when the corresponding keys are depressed generate from these; and further timbre filter 35 to precisely adjust the timbres of the generated sound signals in order to to form the ordinary musical tones of melody, chords, or bass, or corabinations thereof.

In addition to the above-mentioned organ section 36, the instrument includes a rhythm section 37 »which allows the playing of rhythm sounds, such as the desired drum sounds of cymbals, drums, etc., and the ordinary tones of the chords or bass, or combinations thereof, in precise timing with various Tempi, e.g. from Harsch, Tango, Samba, Bossa Iiova and Waltz, made possible. In this case, the invention is so constructed that both the musical tones from the organ section 36 and the rhythmic sounds from the rhythm section 37 can be played when the keys 31.1 to 31 on the keyboards 32 are selectively depressed by output signals as described above by the filter 35 or the key circuit 33 can be used. Namely, the invention includes a trigger generator 38 which receives output signals from the filter 35 or the key circuit 33 to operate a combination pulse generator 39 as will be described later. Pig. Fig. 3 is a concrete circuit diagram of the generators 38 and 39. The trigger generator 38 comprises an amplifier section 38a having three transistors TR 1, TR ₂ and TR ₅ connected in cascade to amplify the audio signal outputs from the filter 35 or the key circuit 33; a wave shaper 38b composed of a clipper 51 having two transistors TR4 and TR5 connected in cascade with the amplifier section 38a, and a differentiation circuit 52 having a capacitor C and a resistor R connected to the output terminal of the clipper 51 , consists; and further a bistable multivibrator 38c with two transistors TRg and TR ₇ , which are so arranged

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are that the base of each of them is supplied with rectified signals obtained by passing the output differentiation signals from the shaper 38h through a rectifier 53 using, for example, a diode D. The emitter of the transistor TR ₇ is directly grounded, while that of the remaining transistors TR _{4 to} TR, - ⁷ id

are grounded through a normally open switch 54 which is only closed by the player when rhythm sounds from section 57 are played. The combination pulse generator 39, on the other hand, comprises a time pulse generator 39a which is formed from an astable multivibrator with, for example, two transistors TR ^ and 5DR ₁₂ e ^e o and which generates a series of time pulses which is a multiple of the basic rhythm frequency of the device; and further a binary counter chain 39b composed of a plurality of flip-flop circuits FF ₁ , FF ₂ , FF ₅ and FF. 3 (only one of these circuits is shown in detail, while the others are represented by boxes) which are connected in series in cascade with the timing pulse generator 39a, each of the flip-flop circuits having two transistors TR ₁ , and includes TR-j *. In this case, the emitters of the two transistors TR ₁₁ and TR * 2 form a timing pulse generator 39a, and the emitter of a respective one of each group of paired transistors TR-13 and TR ₁ . of the cascaded flip-flop circuits which form the binary counter chain 39b are directly grounded, while the emitters of the remaining transistors from the groups of transistors and 2IR.J4 are commonly connected to the collector of one transistor of the bistable multivibrator 38c.

In the above circuit arrangement, when the above output signals from the filter 35 or the key circuit 33 are not to the. Amplifier section 38a is routed to ground when switch 54 is closed, ie, when none of the buttons

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31-j "to 31 _{n of} the keyboards 32 is depressed, the other transistor TR _{7 of} the bistable multivibrator 38c becomes conductive, while one transistor TRg remains non-conductive. For the purpose of the invention, the bistable multivibrator 38c is built in advance so that that it only reverses the above-mentioned condition when it is supplied with output signals from the filter 35 or the key circuit 33, ie that it _{makes the other transistor TR 7} non-conductive and the one transistor TRg conductive.

When the above-mentioned circuit arrangement is in a normal state in which none of the keys 31-j to 31 _{n of} the keyboards 32 are depressed, the transistor TR _{7 is} conductive and the transistor TRg remains non-conductive. Accordingly, the flip-flop circuits PF 1 to I ¹ F., each consisting of two halves of the same construction, and the binary counter chain 39b remain unaffected. When one of the keys 31α to 51 is selectively depressed, however, the binary multivibrator 38c exhibits an inverse condition, that is, one in which the transistor TR ₇ becomes non-conductive and the transistor TRg becomes conductive. As a result, the emitters of the transistors, which form the respective switched-on halves of the flip-flop circuits contained in the binary counter chain 39b, are grounded via the collector of the short-circuited transistor TRg to operate the flip-flop circuits. Therefore, the condition of the flip-flops FF- to FF is reversed to cause combination pulses consisting of the binary outputs obtained by successively dividing the frequency of the timing pulses from the generator 39a from the output terminals 1 - # 1, 1- ^ 2, 1-0 and 1- # 4 are brought out to the switched-on half of the flip-flop circuits FF ₁ to FF ₄ .

A timing pulse encoder or rhythm pattern generator 40 in Fig. 2 consists of logic circuitry such as the

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"includes known diode matrix with a multiplicity of input and output connections. When combination pulses from the output connections i-ifl to 1-4j4 at the switched-on halves and from the output connections O- # 1, 0 ^ 42, O- # 3 and 0- # 4 are fed to the reset halves of the flip-flop circuits in a preselected combination by the player to the appropriate input terminals, then a series of timing pulses or rhythm pattern pulses are generated from the predetermined output terminals, which are precisely timed with the rhythm tempi that are set off are selected such as rumba, march, tango, samba, waltz and bossa nova. The thus obtained series of timing pulses from encoder 40 is applied to a plurality of rhythm sound generators 41 which are arranged to selectively the aforementioned variety of Generate drum sounds so as to selectively select the predetermined one of the rhythm sound generators 41, the selected by the player to excite. For example, pressing one of the keys on the keyboards 32 causes the desired tones of the melody, the chords or the bass or combinations thereof from the organ section 36 together with the well-timed start of the rhythm sounds from the rhythm section 37.

The device for automatic rhythm sound generation, which - as described above - according to the invention for use is arranged in an electronic keyboard musical instrument, it enables not only that the playing of the musical tones from the Section 36 is timed precisely with the rhythm sounds from section 37 is controlled, but also that the player is controlled by eliminating the need to press the rhythm section start switch, as in the earlier devices the IPaIl was, and consequently allows him to be To play the game in as great a variety as is possible with the full use of his hands and feet.

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It should be noted that the specific circuit arrangement which is associated with the combination pulse generator 39, the timing pulse encoder 40 and the rhythm sound generators 41 of the Pig. 2 is related, in detail in Fig. 1 and the trains in the specification of U.S. Patent 3,358,068.

In 5 * ig. 3, a variable resistor YR included in the timing pulse generator 39a is suitably provided to control the repetition period of the timing pulses generated by this generator. When in Pig. 3 a switch 55, shown in dashed lines, between the free contact 54s of the switch 54 and the collector of one transistor TRg of the bistable multivibrator 38c, which is commonly connected to the emitters of the transistors, which are each the switched-on halves of the Plip-Plop circuits Ί ? ί \ to PP ₄ is provided, then it is possible for the player to switch rhythm playing on and off manually, as in the known devices, by closing switch 55 while turning switch 54 at contact 54s will.

Pig. Fig. 4 is a schematic circuit diagram of another embodiment of the inventive device for automatically generating rhythm sounds suitable for use with an electronic keyboard musical instrument. If the instrument is provided with different keyboards, which are arranged, for example, in three stages, ie an upper, a lower and a pedal keyboard 61, 62 and 63, the key switches 6I ₁ to 61 _n> 62 ₁ to 62 _n and 63 ₁ to 63 _n , which are attached to the keyboards 61,62 and 63, common at one end, grounded and at the other end common to the base of the other transistor TR _{7 of} a bistable multivibrator 381c, which has the same arrangement as that of the Pig. 3 has, via separate rhythm start selection switches 64, 65 and 66 for the three respective keyboards 61, 62 and 63 and via one

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for all common rhythm start selection switch 67 connected. The parts of Fig. 4 that are the same as those in Fig. 3 are designated by the same reference numerals and their description is omitted. The device for the automatic rhythm sound generation of the Pig. 4, which - arranged as described above not only enables the desired rhythm sounds to be obtained automatically as in the previous one Embodiment, but also that they are selective accordingly The selected keyboard can be started while playing by using the selectively closed switches the selection switches 64 to 67 corresponding keys are pressed. For example, if the switch 66 is closed alone and the remaining switches 64, 65 and 67 remain open, and the first measure of a tone is activated by selectively depressing the keys 61st to 61 and 62nd to 62 on the upper and lower keys door 61 and 62 played with both hands by one player, and then at the beginning of the second bar, the keys 63 are selected. » to 63 on the pedal keyboard 63 with the 3 feet of the If the player is depressed, then it is possible to automatically play the rhythm from the beginning of the second measure start triggered by playing the pedal.

Although not shown in Fig. 2, this embodiment should preferably such selection switches 64 to 67, as shown in Fig. 4, in the organ section before the connection to the trigger generator 33 included.

Fig. 5 is a schematic block diagram of an automatic rhythm sound generation apparatus according to yet another embodiment of the invention, plural is suitable for use in an electronic keyboard musical instrument. The embodiment of Fig. 5 makes it possible that the usual union tones of the melody and those of the chords or those of the Bas ses that are suitable for the chords, or combinations thereof

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by selectively depressing the individual keys 7I ₁ to 71_, which are arranged in the order of the musical notes on a keyboard 72, in precise timing with a desired rhythm pattern selected from a plurality of Rhythmustem.pl or rhythm patterns. The tones of a desired chord, which consist of a combination of different tone signals of the prescribed pitch, which are obtained from a tone generator 73 upon selective depression of the various keys on the keyboard 72, are supplied to a chord detector 74. This chord detector 74 is, for example. formed from a matrix circuit having a "plurality of input terminals which are energized by selectively depressing the keys 71 ^ to 7" L ·, and is constructed to detect both the type of chord being input and the root notes suitable for those particular chords from the tone generator 73.

The tones of the chords and the bass determined in this way are temporarily stored in the corresponding chord memory 75 and bass memory 76. A rhythm pattern generator 77 has substantially the same arrangement as the aforementioned Zeitsteuerimpulskodierer containing the bistable multivibrator 38c, and generates a desired rhythm pattern is selected _n by the player by selectively depressing the keys 71 * to 71st The rhythm pattern generator 77 controls the actuation of the switches 78 and 79, which are connected in cascade with the chord and bass memories 75 and 76, respectively, in accordance with the timing of an output rhythm pattern generated by the generator 77. The device for the automatic rhythm sound generation of the Pig. 5 with the above arrangement generates the notes of the melody and the notes of the chords or those of the bass which are suitable for it, or combinations thereof, all at the same time in precise timing with the rhythm pattern «

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6 shows a specific circuit arrangement of the other section for triggering the binary counter chain when the keys are selectively depressed, without using a start switch for the rhythm game, as is the case with the conventional gate directions of the Pail. According to the embodiment of the Pig. 6, the above-mentioned bistable multivibrator 33c is _{replaced, for example, by a Pele effect transistor TE 2} Q in order to fulfill a puncture corresponding to the multivibrator 38c. One of the electrodes of a DC voltage source 81, for example the negative electrode, is grounded, and the other, positive electrode is connected in common to one terminal of all normally open key switches 82 .j to 82 _n which are selectively closed when the keys are selectively depressed . The other connection of all these switches 82 .. to 82 is grounded via a resistor B ... and connected via a diode rectifier 83 and a resistor Rp, which are connected in series, to the input connection of the transistor 20, which is common for input and output Terminal is grounded, and its output terminal is connected to a voltage source + B via a load resistor RI ». The input terminal of the transistor TR ₂₀ is grounded through a capacitor C. and a normally open switch 84. If one of the buttons is selectively depressed in the above-mentioned circuit, the switch 84 is open and the corresponding one of a switch 82 .. are closed to 82, then pulsating signals are obtained from the GIeiehspannungsquelle 81st After rectification by a rectifier 83, the pulsating signals generated charge the capacitor C. This capacitor voltage is fed to the input terminal of the transistor TR ₂ Q in order to bring it from the non-conductive to a conductive state. As a result, the voltage at the output terminal of the transistor 20 is reduced to substantially ground potential, whereby substantially the same effect is achieved as that of the above-mentioned bistable multivibrator 38c.

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When the switch 84 is closed after the game is over, the voltage applied to the capacitor Cj becomes abrupt discharged, which ends the automatic rhythm play ".

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Claims (6)

Claims 1, device for automatic rhythm sound generation, which is suitable for use in an electronic keyboard musical instrument which has the instrument body for playing the tones of a melody and that of an accompaniment by selectively depressing a plurality of keys arranged in the order of musical notes "and this device incorporated in the instrument body This device comprises a clock pulse generator for generating a repetitive frequency signal, which corresponds to a four-fold of the basic rhythm frequency, for this device, a "binary counter chain which is connected to the clock pulse generator to generate the signal frequency generated by the clock generator down to integer subunits ^% , a timing pulse encoder connected to the stages of the counter chain to generate a plurality of rhythm patterns, each of which consists of a preselected, different combination of the output signals from the clock pulse generator, and a plurality of Includes rhythm sound generators for generating a preselected rhythm sound corresponding to a rhythm pattern selected from the output rhythm patterns of the encoder, characterized in that each binary counter stage is constructed to start counting upon depression of the keys on the keyboard. 2. Device for automatic rhythm sound generation according to claim 1, characterized in that the circuit for Generation of the trigger impulses further selector switch 109840 / 1196- holds to selectively detect the depression of keys in different keyboards. 3. Device for automatic rhythm sound generation according to claim 1, characterized in that the clock pulse generator comprises an astable multivibrator. 4. Apparatus for automatic rhythm sound generation according to claim 1, characterized in that the "binary count ~ lerkette comprises a plurality of cascaded flip-flop circuits, the first stage with the Clock pulse generator is connected. 5. Apparatus for automatic rhythm sound generation according to claim 1, characterized in that a trigger device for the binary counter chain contains a bistable multivibrator, which has two active switching elements, the are arranged in the same way, has and is constructed so that a predetermined audio signal, generated by selectively depressing the keys to the input terminal of one of these elements is led to this in a non-conductive To bring state and the output terminal of the other element, which can only be activated by selectively depressing the keys is shorted to connect to each of the binary counter stages, causing the counter chain to go through this other element is actuated. 6. Device for automatic rhythm sound generation according to Claim 1, characterized in that the trigger device for the binary counter chain is a DC voltage source, one electrode of which is grounded comprises; also a large number of key switches, which can be used when 109840/1196 press the corresponding buttons with the other elec- tric. trode of the DC voltage source are connected and generate pulsating signals, a rectifier for rectification of the pulsating signals, a capacitor to store the rectified voltage, and an active one Switching element to apply the stored voltage to its input terminal and to its output terminal with each Binary counter stage to connect, creating the counter chain can only be operated via this element when the keys are selectively depressed. Device for automatic rhythm sound generation according to Claim 1, characterized in that the keys are in different Keyboards are arranged, the one ends of the key switches of each keyboard being grounded together and the other ends of the key switches of each keyboard and the other ends of the key switches all keyboards together via corresponding, manually operated ... switches with the trigger device for the binary counter chain are connected. 109840/1196 Blank page