KR950012363B1 - Piano with automatic musical performing - Google Patents

Abstract

The pedal and keyboard action is sensed and recorded in the form of digital data and the auto playing piano is played according to the data. The piano includes a signal detector(20) for detecting pedal and keyboard action, a recording unit(4) for recording output signals of the signal detector(20), a recorder and reproducer(5) for recording output signal of the recording unit and for reproducing signal recorded on a tape, a reproducer(6) for generating data signal for operating pedals and keyboards by decoding reproduced data, and a solenoid unit(8) for driving pedals and keyboards according to output signal of the reproducer(6).

Description

Piano with automatic playing function

1 is a schematic block diagram of a driving circuit of the present invention.

2 to 4 are detailed circuit block diagrams of respective parts of the first drawing.

Figure 5a is a permanent situation of the installation of the solenoid applied to the present invention, Figure b is a partial sectional view of Figure a.

6 is a partial perspective view of the keyboard and the key switch to be applied to the present invention.

* Explanation of symbols for main parts of the drawings

1: Keyboard Switch 2: Pedal Switch

3: microphone 4: recording circuit

5: recording / playback device 6: playback circuit

7 driving circuit part 8 solenoid part

20: signal detection unit

The present invention is a piano having an automatic playing function, more specifically, the piano played by the pianist recorded by converting the electronic signal, and reproduced the recorded signal so that the music can be automatically played by driving the string directly It's about a piano.

In general, since the performance of the piano is only available in a certain place, there is little chance of actual performance. Also, the pianist could record the music played by a tape recorder and then play it back by a playback device. Since the sound is not driven by driving, there is a defect such as a difference in sound quality.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its object is to convert and record keys, pedals and key presses, etc. into digital signals when playing the piano, and to reproduce the digital signals when necessary. It is to provide a piano having an automatic playing function that can automatically reproduce the music played by driving the string directly by this signal.

In order to achieve the above object, the present invention, by detecting the keyboard and the pedal pressed by the player by the matrix circuit outputs the signal of the pedal and the keyboard, and by detecting the strength and weakness of the sound generated by the drive of the strings low tone signal and treble A signal detecting unit 20 for outputting a signal, a recording circuit unit 4 for combining and combining the detection signals output from the signal detecting unit 20 into digital data signals, and an output of the recording circuit unit 4 A recording / playback apparatus 5 for recording a data signal on a tape or reproducing the recorded signal, and separating the playback data signal of the recording / playback apparatus 5 into a keyboard signal, a pedal signal, a bass signal, and a treble signal A reproducing circuit section 6 for generating data signals for keys, pedals, and sound strength and weakness, and an output data signal of the reproducing circuit section 6 by a logic circuit to output a keyboard and pedal drive signal. Consists of a circuit 7, a keyboard, and the solenoid unit (8) which drives the corresponding keys and pedals by the pedal drive signal of the drive circuit (7).

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 to 4, the signal detecting unit 20 is operated according to the pressing of the keyboard and the pedal to output the pressing signals of the corresponding keyboard and the pedal. It consists of the microphone 3 which receives the sound produced by the vibration of a string.

The recording circuit section 4 includes a master clock generator 41 for generating a clock signal of a predetermined reference, and a clock counter 42 for counting clock signals of the master clock generator 41 and supplying clock signals necessary for each circuit. And the timing generator 43 for supplying the matrix switch signal to the keyboard switch 1 and the pedal switch 2 by the clock signal of the clock counter 42 and the three clock signals of the clock counter 42 ( A multiplexer 44 for converting the parallel push signal of the keyboard switch 1 and the pedal switch 2 into a serial data signal DT1 using the C-C3 as an address signal, and the string detected by the microphone 3; Shear amplifier 46 for amplifying the fine sound intensity signal caused by vibration, band filter 47 for separating the amplified signal of the shear amplifier 46 into high and low sound, high and high frequency of the band filter 47, and The analog signal of the low tone is converted into a high tone signal (TB) The comparator 48 for converting the signal, the serial data signal DT1 of the keyboard and pedal of the multiplexer 44, the high tone signal TB and the low tone signal BS of the comparator 48, and the clock counter 42; In the case where the clock signal C4 is present by combining the clock signal C4, the data generator 45 combines the data signal DT1 with the high tone signal TB and the low tone signal BS.

The reproducing circuit section 6 also includes a signal converter 61 for converting the data signal reproduced from the recording / reproducing apparatus 5 into a pulse data signal DT2 having a constant pulse width, and a pulse of the signal converter 61. The address generator 62 generates an address signal AD1-AD3 which is a data selection signal synchronized with the data signal by counting the data signal DT2, and the address signal AD1-AD3 of the address generator 62 makes the above-mentioned operation possible. The demultiplexer 63 converts the serial data signal DT2 of the signal converter 61 into a predetermined number of parallel data signals and outputs the enable signal EN, and the pulse data signal DT2 of the signal converter 61. Among them, a treble / bass signal separator 64 for separating and outputting the treble signal TB and the bass signal BS, and a damper pedal signal DP and a soft pedal signal among the pulse data signal DT2 of the signal converter 61. A pedal signal separator 65 for separating and outputting SP.

On the other hand, the driving circuit portion 7 is composed of a plurality of driving circuits 70, which are driven by the data address signals AD1-AD3 and the enable signal EN of the reproducing circuit portion 6; A latch 71 for converting the serial data signal DT2 into a parallel data signal DT3 and holding the parallel data signal DT3 for a predetermined time; and a parallel data signal DT3 of the latch 71; By driving the high-pitched signal TB and the low-tone signal BS of the reproducing circuit unit 6, respectively, the drive control signal (only when the data signal DT3, the high-pitched signal TB, and the low-tone signal BS are simultaneously input). And a drive controller 80 for outputting a drive signal to the keyboard drive solenoid by the drive control signals DC1-DC8 of the logic circuit 72.

In addition, the solenoid part 8 includes a solenoid 99 and a 100 for operating the damping pedal and the soft pedal by the damping pedal signal DP and the soft pedal signal SP of the reproducing circuit part 6, and the driving circuit part. And a key solenoid 90-98 that makes a sound by pushing a key by the drive signal of 7).

On the other hand, the solenoid 110 arranged in two rows of upper and lower is installed below the inner end of the keyboard 11 so that the operating rod 112 of the solenoid 110 pushes the lower end of the inner end of the keyboard 11.

In the present invention having the configuration as described above, when the player presses the key 11 as shown in FIG. 6 to play music, the upper end of the rear end of the key 11 pushes up the hammer driving device 16. Accordingly, the hammer 14 installed on the upper portion of the driving device 16 is operated to strike the string 15 corresponding to the pressed key.

Therefore, the resonance sound of the string is generated, and at the same time, since the key switch 13 installed on the upper portion of the keyboard support 12 is pressed, the push signal of the corresponding key is output, and the vibration sound of the string generated above is Input to a microphone (not shown).

In addition, even when the player presses the dempo pedal and the soft pedal (not shown), the pedal press signal is output by the same switch operation as that of the keyboard switch.

As described above, when the push signal is output by the operation of the keyboard and the pedal switch, and the vibrating sound of the string is input through the microphone, as shown in FIG. 2, the master clock generator 41 outputs a reference clock signal of a constant frequency to a clock counter ( 42, the clock counter 42 counts the input clock signal and supplies the clock signal required for each of the timing generator 43, the multiplexer 44, and the data generator.

Accordingly, the timing generator 43 outputs two pedal switch signals and ten key key signals, and this key signal is a multiplexer as a switch push signal through the key switch 1 and the pedal switch 2 which are matrix circuits. The multiplexer 44 synchronizes the key press signal and the pedal press signal inputted by the data selection signals C1-C3, which are three clock signals having different periods of the clock counter 42. It is converted into one push data signal DT1 and output to one input of the data generator 45.

On the other hand, the vibrating sound of the string input to the microphone 3 is amplified by the shear amplifier 46, the fine signal is amplified by the band filter 57 and is applied to the comparator 48 as a comparison signal as a comparison signal, At this time, the sound attenuation is proportional to the time when the separated high and low sounds are output, and the vibrating sound of the string divided into high and low sounds by the reference voltage of a constant voltage applied to the comparator 48 is the digital low signal (BS). And the high-pitched signal TB are applied to the other input of the data generator 45, respectively.

The data generator 45 includes a push data signal DT1 of a keyboard and a pedal of the multiplexer 44, a high tone signal TB and a low tone signal BS indicating a sound intensity of the comparator 48, and a clock counter ( The constant clock signal C4 of 42 is processed as an AND gate so that the output is output only when all of the data signal DT1, the high tone signal TB, the low tone signal BS, and the clock signal C4 are input. The serial data signal outputted from the data generator 45 is recorded in the recording / reproducing apparatus 5.

In this way, the music played by the player is recorded on a tape or disc as a data signal.

In addition, in the case of reproducing the recorded data of the recording / reproducing apparatus 5, as shown in FIG. Is converted into a pulse data signal DT2 having a constant pulse width and applied to the driving circuit unit 7 as a data signal, and at the same time, the address generator 62, the demultiplexer 63, the treble / bass separator 64 and the pedal signal separator 65 Are applied to

As a result, the address generator 62 counts the input data signal DT2 to produce a 3-bit address signal AD1-AD3, which is a data selection signal synchronized with the data signal, and the address signals AD1-AD3 It is applied to the drive circuit unit 7 as an address signal and at the same time as the selection control signal C5-C7 of the demultiplexer 63.

Accordingly, the demultiplexer 63 converts the serial data signal DT2 input according to the selection control signals C5-C7 into a parallel data signal and supplies it as an enable signal EN, which is a latch selection signal in the driving circuit unit 7. Done.

In addition, the treble / bass generator 64 separates the treble signal TB and the bass signal BS from the input data signal DT2 and applies them to the driving circuit unit 7, respectively, and the pedal signal separator 65 inputs them. The damping pedal signal DP and the soft pedal signal SP are separated from the data signal DT2 to be applied to the damping pedal driving solenoid 99 and the soft pedal driving solenoid 100 in the driving circuit unit 7, respectively. .

On the other hand, the drive circuit unit 7 is composed of 10 of the same drive circuit 70 as shown in FIG. 4, the operation of one drive circuit 70 will be described here.

When the latch 71 is selected by the enable signal EN of the reproduction circuit unit 6, the latch 71 converts the serial data signal DT2 into the parallel data signal DT3 according to the input address signal AD. ) And then export to the output for a while.

In this way, the parallel data signal DT3 of the latch 71 is applied to one input of the eight AND gate logic circuits 72-79, respectively, and the AND gate logic circuits 72-79. The other input of the high and low signal (TB) and low tone signal (BS) of the treble / bass separator 64 of the reproduction circuit unit 6 is applied respectively to the data signal (DT3), treble signal (TB) and bass signal ( Only logic circuits in which all BSs are present will operate.

Therefore, in the logic circuit in which the data signal DT3, the high tone signal TB, and the low tone signal BS exist, the "high" level drive control signals DC1-DC8 are outputted to the drive controllers 80-88. In this case, only driving controllers to which the driving control signals DC1 to DC8 of the "high" level are applied are operated to apply driving voltages for operating the key driving solenoids 90 to 98 corresponding to each driving controller. .

Accordingly, as shown in FIGS. 5 and 6, when current flows in the coil 111 of the solenoid 110, the operating rod 112 made of aluminum or the like installed on the center of the coil is raised by the electric force. Felt 113 made of a soft material attached to the end of the working rod 112 pushes the key 11, and the hammer 14 hits the string 15 in the same manner as the key 11 is hit. Will be given.

On the other hand, the adjustment of the strength of the hammer 14 hits the string 15 is determined according to the output time of the high tone signal TB and the low tone signal BS. That is, when the time for outputting the high sound signal TB and the low sound signal BS is long, the time for driving the drive controller 80-88 becomes long, so that the time for the hammer 14 to hit the string 15 becomes long. The vibration of the strings 15 becomes high.

As shown in FIG. 4, the pedal drive solenoid 99 and the soft pedal drive solenoid 99 are controlled by the damper pedal signal DP and the soft pedal signal SP of the pedal signal separator 65. 100) is activated to move the dempo pedal or soft pedal.

As described above, the present invention records the playing music of the pianist as electrical data, and directly plays the strings by reproducing the recorded data, so that the music of the famous pianist can be listened to live music regardless of time and place. Therefore, it can be used for piano practice and accompaniment of vocalists.

Claims (6)

The signal detecting unit 20 detects the keys and pedals pressed by the player by the matrix circuit and outputs the push signal of the pedals and the keyboard, and detects the strength and weakness of the sound generated by driving the strings, and outputs the low and high sound signals. A recording circuit unit 4 for combining and synthesizing the detection signals of the signal detection unit 20 to convert them into digital data signals, and recording / reproducing the data signals of the recording circuit unit 4 on a tape or reproducing the recorded signals. Reproducing apparatus 5 and the reproduced data signal of the recording / reproducing apparatus 5, which divides the reproduced data signal into a keyboard signal, a pedal signal, a bass signal and a treble signal, and outputs a data signal for the strength of the keyboard, pedal and sound. The circuit section 6, the drive circuit section 7 for outputting the keyboard and pedal drive signals by combining the data signals of the reproduction circuit section 6 into a logic circuit, and the keyboard and pedal drive signals of the drive circuit section 7 The corresponding keyboard and pedal The automatic player piano has a function comprising the solenoid unit 8, which was the same. 2. A clock according to claim 1, wherein the recording circuit section (4) counts the clock of the master clock generator (41) for generating a clock signal of a predetermined reference, and supplies a clock signal for each circuit by counting the clocks of the master clock generator (41). A timing generator 43 for supplying a matrix switch signal to the keyboard switch 1 and the pedal switch 2 using the counter 42, the clock signal of the clock counter 42, and the clock counter 42. The multiplexer 44 converts the parallel push signal of the keyboard switch 1 and the pedal switch 2 into a serial data signal DT1 using the three clock signals C1-C3 as address signals. A shear amplifier 46 for amplifying the fine and weak signals caused by the vibration of the detected string, a band filter 47 for separating the amplified signal of the shear amplifier 46 into high and low sounds, and the band filter 47 The high and low analog signals of the A comparator 48 converting a digital signal, a serial data signal DT1 of a keyboard and a pedal of the multiplexer 44, a high tone signal TB, a low tone signal BS of the comparator 48, and the clock counter ( When the clock signal C4 exists by combining the clock signal C4 of 42, a data generator for synthesizing and outputting the data signal DT1 of the keyboard and the pedal, the high tone signal TB, and the low tone signal BS ( 45) a piano having an automatic playing function, characterized in that consisting of. The signal converter 61 according to claim 1, wherein the reproduction circuit section 6 converts the reproduced data signal of the recording / reproducing apparatus 5 into a pulse data signal DT2 having a constant pulse width. An address generator 62 which counts the pulse data signal DT2 of 61 to produce an address signal AD1-AD3, which is a data selection signal synchronized with the data signal, and the address signal AD1-AD3 of the address generator 62; Demultiplexer 63 converts the serial data signal DT2 of the signal converter 61 into a predetermined number of parallel data signals and outputs the enabled signal EN as a pulse signal of the signal converter 61. A high pitched bass signal separator 64 for separating and outputting the high pitched signal TB and the low pitched signal BS from the signal DT2, and the damper pedal signal DP among the pulse data signal DT2 of the signal converter 61. And a pedal signal separator (65) for separating and outputting the soft pedal signal (SP). Piano with automatic playing function to gong. 2. The driving circuit section (7) according to claim 1, wherein the driving circuit section (7) consists of a plurality of driving circuits (70), which drive data sections (AD1-AD3) and enable signals (EN) of the reproduction circuit section (6). ) Converts the serial data signal DT2 into the parallel data signal DT3 and holds the parallel data signal DT3 for a predetermined time, and the parallel data signal of the latch 71. DT3) and the high tone signal TB and the low tone signal BS of the reproduction circuit section 6 are respectively logically driven only when the data signal DT3, the high tone signal TB and the low tone signal BS are simultaneously input. A logic circuit 72 for outputting control signals DC1-DC8 and a drive controller 80 for outputting a drive signal to the keyboard drive solenoid by the drive control signals DC1-DC8 of the logic circuit 72. Piano with automatic playing function, characterized in that made. The solenoid unit (100) according to claim 1, wherein the solenoid unit (8) operates solenoids (99) (100) for actuating the damping pedal and the soft pedal by means of the damping pedal signal (DP) and the soft pedal signal (SP) of the reproducing circuit unit (6) A piano having an automatic playing function, comprising a keyboard solenoid (90-98) which makes a sound by pushing a key by a drive signal of a driving circuit unit (7). 6. The operating rod 112 according to claim 5, wherein the key solenoids 90-98 arranged in two rows of upper and lower sides are installed at the lower end of the inner end of the keyboard 11, and the operating rods 112 operated up and down by the solenoids 90-98 are keyboards. A piano having an automatic playing function, characterized in that for pushing the lower end of (11).

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