KR940005038B1 - Communication device for digital piano education - Google Patents

Abstract

The device improves efficiency of education for piano lessons whether for individual or not. The device includes a piano jack (10) which inputs piano signals, a communication microphone jack (8), a calling button (7), a headphone jack (9), a microphone amplifier (15) and stereo amplifier (17), a signal transfer unit (11), a main amplifier (12), a calling display LED (1), a selecting display LED (2), a selecting button (3), a total selecting button (4), a total removing button (5), a transfer adjust unit (13) and a power supply circuit (14).

Description

Digital Piano Educational Communication Device

1 is an external perspective view of a communication device of the present invention.

2 is a circuit diagram of a communication device of the present invention.

3 is a circuit diagram of a sub unit of the communication device of the present invention.

4 is a circuit diagram of a main unit of the communication device of the present invention.

* Explanation of symbols for main parts of the drawings

1: Call forward LED 2: Selection display LED

3: Select Button 4: Select All Button

5: All release button 6: Power switch

7: call button 8: microphone jack

9: headphone jack 10: piano jack

11: signal exchange unit 12: main amplifier

13: exchange adjustment unit 14: power supply circuit

15: microphone amplifier 16: VOX circuit

17: stereo amplifier 18: variable resistor

19: First flip flop 20: J flip flop

21, 22: relay 23: oscillator

24: connecting line

[Field of Invention]

The present invention relates to a digital piano educational communication device. More specifically, it relates to a multi-ware digital piano educational communication device in which an instructor can guide a student individually or in a group, or communicate with or collaborate with students.

[Background of invention]

In the conventional acoustic piano (Acousitc) piano using a hammer connected to the keyboard to generate a sound by vibrating the tuning line, so the volume is disturbed to others during practice. Therefore, I practiced in a soundproofed individual practice room, but this is inconvenient because the instructor has to go to the practice room and teach it, and in most small classrooms that do not have soundproof facilities, they are limited in the time and place of practice. There was a problem.

The digital piano solves this problem. The digital piano generates sound corresponding to the keys of each keyboard using the sound source circuit, and reduces the noise by listening to the sound generated by using the speaker or the headphone which can adjust the volume, and also connects each piano electronically. You can lead without looking around.

However, since the centralized piano connection system is mostly a two-way system, communication between the instructor and the student and transmission of the sound are possible, but there is a problem that communication between students and communication with multiple students are impossible. In addition, the operation is complicated, even if the ambient noise during the conversation through the microphone for the call can not be controlled and the price was expensive.

[Summary of invention]

The communication device of the present invention for solving the above problems and to increase the effect of the piano education is to relay the performance signal of the digital piano, the jacks for connecting the microphone jack, piano jack, headphone jack, etc., instructor call button, microphone amplifier, A subunit including a VOX (voice operating exch-anger) circuit and a stereo amplifier, and a signal exchange unit that connects only signals from a selected unit among a plurality of subunits, which are operated by an instructor, a main amplifier, an LED display unit, a signal conditioning circuit, It is composed of a main unit including a selection button unit and a power supply circuit, and a digital piano educational communication device capable of simultaneously teaching a plurality of students, preferably about 10 people, by one instructor.

[Purpose of invention]

It is an object of the present invention to provide a centralized digital piano educational communication device for educating a plurality of students at the same time.

It is another object of the present invention to provide a centralized digital piano educational communication device capable of calling and joining students.

Another object of the present invention is to provide a centralized digital piano educational communication device having a function of preventing the inflow of noise through a telephone microphone.

[Description of Specific Example of the Invention]

The communication apparatus of the present invention will be described with reference to the accompanying drawings.

1 is an external perspective view of the main unit A and the sub unit B of the communication device of the present invention, in which the main unit A displays the call display LED 1 indicating the call of the sub unit as a flashing signal, and a selection button. (3), the selection display LED (2) which displays the selected subunit in response to the call signal; (2) the all selection button (4) for selecting all the subunits, the all release button (5) for releasing all, and the power switch (6); Subunit including a main unit (A) and a call button (7), a microphone jack (8), a headphone jack (9) and a piano jack (not shown) connected to a digital piano (not shown); B) is shown. As shown, the panel of the main unit (A) has 10 selection buttons, a call, and a selection display LED, and 10 sub units are used corresponding to the above, and the LEDs and buttons of the top and bottom correspond to one sub unit. . Therefore, 10 people can practice at the same time, and one of them is recommended to connect the digital piano of the instructor. It can also be easily expanded by increasing the number of subunits as needed, in which case the capacity of the main amplifier can be increased.

2 is a circuit configuration diagram of a communication device of the present invention, which transmits a microphone signal, a piano signal, and a call signal to the main unit, and receives a headphone signal from a sub unit B and a microphone signal and a piano signal of a specific sub unit. Selected signal exchange unit 11, main amplifier 12 amplifying the output signal of the signal exchange unit 11, call indication LED 1 flashing by the call signal of the sub unit, and any sub which sent the call signal. A selection button 3 for selecting the unit B ₁ , a selection display LED 2 for displaying the selected subunit B, and an exchange adjustment unit 13 driven by a signal of the selection button 3; Main unit A is shown.

The subunit B and the main unit A as described above will be described in detail with reference to FIGS. 3 and 4.

For convenience of explanation, it is assumed that a call signal is generated from the sub unit B ₁ , for example. The subunit B ₁ shown in FIG. 3 has a piano jack 10 connected to a headphone jack of a digital piano, and a microphone jack 8 for a call with an instructor or another student. It is input to the main amplifier 12 of the unit A simultaneously. In addition, a call button 7 for calling an instructor and a headphone jack 9 for listening to a piano signal to be played are attached.

After the microphone signal is amplified by the microphone amplifier 15 installed in the sub unit B ₁ before being input to the main unit, the signal is adjusted by the VR 18 and separated into a stereo signal by the microphone stereo amplifier 17. It is input to the main unit (A) through the communication I / O connection line. On the other hand, the microphone amplifier 15 is connected when a microphone signal of a predetermined level or more is continuously generated in order to block external noise, and a VOX circuit as a means of blocking the microphone signal when the sound of the sound continues for a few seconds (about 5 seconds) or more. 16) can be operated to hear clean sound during normal performances. Here, the communication input and output connection line is a communication cable having a plurality of wires by connecting the sub unit (B ₁ ) and the main unit (A). Signals other than the microsignals are directly connected from the subunit B ₁ to the main unit A.

4 is a circuit diagram of the main unit (A), which is easily installed and operated next to the digital piano used by the instructor, and the sub unit (B ₁₀ ) used by the instructor is always selected for teaching by connecting the main unit and the piano. Used as The call signal of the sub unit B ₁ is input to the first flip flop 19 of the exchange adjustment unit 13 to set the first flip flop 19, and the sub unit in which the call signal is fired according to the set signal. Corresponding to the call indication LED (1) flashes. For this purpose, a number of flip-flops corresponding to each sub unit is provided. In this embodiment, _ten sub-flops are required because there are ten sub units B ₁ to B ₁₀ . On the other hand, the flashing signal can be achieved by using one oscillator 23 connected in parallel with the call indication LED (1).

When the instructor recognizes the blinking LED and presses the selection button (3) of the corresponding subunit to select the subunit (B ₁ ) that sent the call signal (if it is ON), the J flip flop (20) connected to the selection button (3) ) Is set and resets the first flip-flop 19 (this is connected to the LED on which the call signal is displayed) to turn off the flashing LED (1) and at the same time the selected subunit (B ₁ ) and main unit (A). Activate the relay (Ry) to connect. Two relays (Ry) are allocated per sub unit, and the first relay (R ₁ ) is connected to the micro signal of the sub unit (B ₁ ) and the piano signal, and the _second relay (R ₂ ) is a headphone connected to the main amplifier (12). Is connected and the instructor does not press the select button 3 (when it is OFF) or when the release button 5 is pressed, the first reel (Ry ₁ ) and the J relay to listen to the performer only. (Ry ₂ ) is connected. Therefore, when the selection button 3 is pressed (ON), the microphone signal of the first relay Ry ₁ and the piano signal are amplified by the main amplifier 12, and then connected to the headphone through the Jay relay Ry ₂ and not pressed. If not, the signal of the first relay Ry ₁ is directly connected to the _second relay Ry ₂ through the line 24. In addition, the best relay (Ry ₁₎ is different subunits (B ₂ to B ₁₀₎ first relay (Ry ₁₎ and a second relay of (Ry ₂₎ is a second relay in the other subunit (B ₂ to B ₁₀₎ (Ry ₂₎ In parallel, all subunits selected by the instructor are simultaneously called, allowing students to talk and cooperate. The all-selection button 3 and the all-release button 5 are connected to the set and reset of all the second flip-flops corresponding to all the subunits of the exchange adjustment unit 13. Reference numeral 14 is a power supply circuit.

As described above, the present invention allows the instructor to individually or a large number of students to choose a group and can effectively guide a large number of people.

Although the present invention has been described only with respect to the described embodiments, it will be apparent to those skilled in the art that the present invention may be variously modified or modified within the spirit and scope thereof, and thus such changes and modifications are within the scope of the appended claims.

Claims (5)

Piano jack 10 for inputting a piano playing signal, a microphone jack 8 for a call, a call button 7 for calling an instructor, a headphone jack 9 for listening to a performance, and the microphone jack 8 A sub unit B including a micro amplifier 15 and a stereo amplifier 17 for amplifying and separating an input signal of a microphone; A signal exchange unit 11 for selectively connecting the output signal of the sub unit B, a main amplifier 12 for amplifying the signal of the signal exchange unit 11, and a call button 7 of the sub unit B; Call display LED (1) which detects and flashes a signal, selection display LED (2) which displays subunit (B) selected by the instructor, selection button (3), all selection button (4) or all release button (5) A digital piano comprising a main unit (A) including an exchange adjusting unit (13) for selecting a sub unit (B) of the signal exchange unit (11) and a power supply circuit (14) in accordance with a selection signal of? Educational communication device. The digital piano educational communication device according to claim 1, wherein the microphone amplifier (15) further comprises a noise suppressing VOX circuit (16). The digital piano educational communication device according to claim 1, wherein the means for blinking the call indication LED (1) is an oscillator (23). The method of claim 1, wherein the second relay (Ry ₂₎ for the signal exchange unit (11) is connected to the first relay (Ry ₁₎ and the headphone jack (9) to connect a microphone in the piano type of each sub-unit (B) Digital piano educational communication device, characterized in that consisting of. Claim 4, wherein the first relay (Ry ₁₎ other subunits first relay (Ry ₁₎ and said second relay (Ry ₂₎ The other sub-unit (B ₂ -B ₁₀ of (B ₂ -B ₁₀₎ according to J. Relay (Ry ₂ ) of) Digital piano educational communication device, characterized in that connected.