KR200143635Y1 - Mike input acoustic effect for electric instrument - Google Patents

Abstract

The present invention relates to an electronic musical instrument, and more particularly, to a microphone input sound effect electronic musical instrument capable of adding a sound effect to a song that is matched to music played by a keyboard by performing sound effect processing on a microphone input voice signal.

Conventional electronic instruments can process various sound effects only on music played on the keyboard, for example, reverberation, chorus, distortion, flange, etc. The voice signal (when the user sings to the keyboard performance, etc.) has a limitation that cannot add sound effects, and in order to add sound effects to the microphone input voice signal, a separate mixer or amplifier (Amp) can be processed only if the desired sound effects can be processed, there is a problem that the cost of building the system is increased.

The present invention includes a microphone input unit for an electronic musical instrument, converts a user's voice signal input through the microphone input unit into a digital signal, and processes the digitally converted voice signal through sound effects, and plays the sound effect processed voice signal on the keyboard. It is a microphone input sound effect electronic instrument that can be mixed with music and output to a speaker while adding various sound effects to the user's voice signal.

Description

Microphone input sound effect electronic instrument

1 is a block diagram of a microphone input sound effect electronic musical instrument of the present invention.

2 is a detailed circuit diagram of the microphone input unit of the present invention.

3a to 3e is a timing diagram of the operation of the microphone input unit of the present invention.

* Explanation of symbols for main parts of the drawings

1: microphone jack 2: preamplifier

3: low pass filter 4: A / D conversion unit

5: Keyboard part 6: Display / function switch part

7: central processing unit 8: ROM

9: RAM 10: Sound generator

11: instrument sound data memory 12: sound effect processor (DSP IC)

13: ROM 14: RAM

15: D / A conversion section 16: mixing section

17: amplifier 18: speaker

The present invention relates to an electronic musical instrument, and more particularly, to a microphone input sound effect electronic musical instrument capable of adding a sound effect to a song that is matched to music played on a keyboard by performing sound effect processing on a voice signal input to a microphone.

Conventional electronic instruments can process various sound effects only on music played on the keyboard, for example, reverberation, chorus, distortion, flange, etc. The voice signal (when the user sings to the keyboard performance, etc.) has a limitation that cannot add sound effects, and in order to add sound effects to the microphone input voice signal, a separate mixer or amplifier (Amp) can be processed only if the desired sound effects can be processed, there is a problem that the cost of building the system is increased.

The present invention includes a microphone input unit for an electronic musical instrument, converts a user's voice signal input through the microphone input unit into a digital signal, and processes the digitally converted voice signal through sound effects, and plays the sound effect processed voice signal on the keyboard. It is an object of the present invention to provide a microphone input sound effect electronic musical instrument that can be mixed with music and output to a speaker by adding various sound effects to the user's voice signal.

Electronic instrument of the present invention for achieving the above object, referring to Figure 1, the microphone jack 1 is connected to the microphone and inputs a user's voice signal, and to amplify the voice signal input to the microphone jack The preamplifier 2, a low pass filter 3 for removing noise from the amplified voice signal, and filtering only a voice signal component; and the filter under the control of the sound generator 10 and the sound effect processor 12. A / D converter 4 for converting and outputting an analog voice signal into a digital voice signal, a keyboard part 5 for outputting user performance information, and an operation state of the instrument are displayed. A display / function switch unit 6, a central processing unit 7 for decoding the function switch operation and keyboard operation information to control an output of a musical instrument desired by the user, and a control program for generating musical instrument sounds of the central processing unit 7 This stored (ROM) 8, a RAM 9 in which control data of the central processing unit 7 is temporarily stored and decoded, and a musical instrument sound corresponding to a key pressed under the control of the central processing unit 7; A sound generator 10 for controlling the operation of the A / D converter 4 when an instrument sound is generated, and an instrument sound data memory 11 storing instrument sound data of the sound generator 10; A sound effect processor 12 for adding an effect sound to the instrument sound generated by the sound generator 10 and the digital voice signal output from the A / D converter 4, and the sound effect processor 12 ROM (13) in which the effect processing program is stored, a RAM (14) for temporarily storing and decoding the data of the sound effect processing unit (12), and an output instrument of the sound generating unit (10). A D / A converter 15 for converting a sound signal or the sound signal processed by the sound effect processing unit 12 into an analog signal and outputting the analog signal; That consists of a voice and musical instrument sound signal mixing section 16 for mixing and outputting, an amplification section 17, a speaker 18 for outputting the amplified signal for amplifying and outputting the mixed signal.

The microphone input sound effect electronic musical instrument operation of the present invention configured as described above is as follows.

First, when a player starts playing by pressing a key of the keyboard part 5, the central processing unit 7 decodes this keyboard information to determine the currently pressed key, and outputs the instrument sound of the note corresponding to the pressed key. The sound generating unit 10 is controlled, and the sound generating unit 10 reads the corresponding instrument sound data from the instrument sound data memory 11 under the control of the central processing unit 7, and the instrument of the pitch and tone corresponding to the keyboard. Generates sound

The generated instrument sound is supplied to the D / A converter 15 to be converted into an analog signal without effect sound processing, or is output to the sound effect processing unit 12 and subjected to sound effect, and then the sound effect is added to the instrument sound signal. Is converted into an analog signal by the D / A converter 15 and output.

The sound effect processing of the sound effect processing unit 12 is performed by performing various sound effect processing programs stored in the ROM 13, and data related to the sound effect processing are temporarily stored in the RAM 14.

On the other hand, while the keyboard is playing as described above, the user's voice signal is input through the microphone jack 1, which is amplified by the preamplifier 2 and passed through the low pass filter 3 to remove noise. Only the audio signal component is supplied to the A / D converter 4.

The A / D converter 4 converts the input analog voice signal into a digital voice signal and supplies the same to the sound effect processor 12. At this time, the A / D converter 4 generates sound in the sound generator 10. The timing of performing the digital conversion is controlled in accordance with the timing, and the timing control of the digitally converted data is controlled by the sound effect processor 12 to supply the digital voice signal to the sound effect processor 12.

The sound effect processor 12 performs the above-described effect sound processing on the input digital voice signal, and supplies the voice signal to which the effect sound is added to the D / A converter 15, and the D / A converter 15 is input. The digital voice signal is converted into an analog voice signal and supplied to the mixing unit 16.

The mixing unit 16 mixes the input analog sound signal (signal with or without the effect sound) and the sound signal with the effect sound, and the mixed signal is amplified by the amplifier 17. By being output through the speaker 18, the audio signal input to the microphone is processed by the effect sound is output along with the instrument sound played on the keyboard.

2 shows a detailed circuit of the microphone input unit of the present invention. Referring to this, the preamplifier 2 includes an operational amplifier A1 for amplifying a voice signal input from a microphone, and the operational amplifier A1. A resistor R0-R4 and capacitors C1-C8 for setting the bias and amplification degree, and a variable resistor VR1 for regulating the output level of the operational amplifier. And an op amp A2 for removing the noise of the audio signal, and a resistor R5-R7 and a condenser C9-C12 for determining filtering frequency characteristics of the op amp. Reference numeral 4 denotes a reference voltage circuit section 4A for supplying a reference voltage for analog / digital conversion, an A / D converter (4B) for receiving the reference voltage and digitally converting and outputting a voice signal, and the sound. Decode the output control signal WSBD (CLBD) of the generator 10. The first timing controller 4C for controlling the timing of the write (/ WR) of the A / D converter and the output control signal (/ PMS) (/ DRD) of the sound effect processor 12 are decoded. The second timing controller 4D controls the read timing of the D converter.

The reference voltage circuit 4A includes a resistor R8 and a zener diode ZD1 for stabilizing an input power supply, an output transistor TR1 for switching on / off the zener voltage as an input, and a capacitor for removing ripple ( C13-C15, and the first timing controller 4C includes a flip-flop 19 for delaying the input signal WSBD from the sound generator 10, and an output of the flip-flop 19. Exclusive OR 20 which outputs a frame signal FRAME by exclusive OR of the input signal WSBD, and a control signal / SCON of the A / D by OR of the frame signal and the input signal WSBD. An oragate 21 for outputting to the converter 4B, wherein the second timing adjusting unit 4D is an ORG for outputting the OR of the input signal (/ PMS) (/ DRD) of the sound effect processing unit 12. Logic 22, the inverter 23 for inverting the input signal DA0, the inverted signal and the output of the oragate 22 In addition, it consists of an orifice 24 which outputs a control signal / SEL0 to the A / D converter 4B.

The operation of the microphone input unit of the present invention configured as described above is as follows.

This voice signal, to which the user's voice signal is input through the microphone jack 1, is amplified by the operational amplifier A1, and its output level is adjusted by the variable resistor VR1 and input to the low pass filter 3. The voice signal is passed through the voice signal component of the filtering frequency band set by the operational amplifier A2, the resistors R6, R7, and the capacitors C10, C11, and the noise components are removed to the A / D converter 4B. Is entered.

The A / D converter 4B receives the reference voltage set by the reference voltage circuit 4A, converts the input voice signal into a digital voice signal, and outputs the digital voice signal D0-D9. At this time, the first timing controller 4C ) And the second timing adjusting unit 4D output a digital voice signal under the read / write control.

That is, as shown in FIGS. 3A and 3B, the control signals CLBD and WSBD supplied from the musical instrument sound generator 10 are transferred to the gates 20 and 21 and the flip-flop of the first timing controller 4C. 19), the frame signal FRAME is output as shown in FIG. 3C, and the control signal / SCON as shown in FIG. 3D is converted to the A / D converter using the frame signal FRAME and the control signal WSBD. Each gate 22 of the second timing adjusting unit 4D supplies a control signal / PMS (/ DRD) supplied to the light control stage / WR of 4B and supplied from the sound effect processing unit 12. (23) and (24), the control signal (/ SEL0) as shown in FIG. 3e is supplied to the read control terminal (/ RD) of the A / D converter (4B) and digital data (D0-D9) of the microphone input audio signal is processed. ) Is input to the sound effect processing unit 12 is adjusted.

The reference voltage circuit 4A removes the ripple component from the reference voltage set by the control diode ZD1 and the transistor TR1 by the capacitors C13 and C14 to remove the ripple component from the reference voltage terminal of the A / D converter 4B. It is supplied to (VREF) (V + B).

In this way, the digital voice signal output from the A / D converter 4B is input to the sound effect processing unit 12, so that the effect sound is added as described above, and output to the speaker 18 together with the instrument sound.

As described above, according to the present invention, it is possible to process the sound signal of the user's voice input to the microphone while playing music with the electronic musical instrument and output the sound to the speaker, so that the existing electronic musical instrument can be used without purchasing expensive equipment. It can perform the function of the mixing amplifier, and there is an effect that can be enjoyed by adding various sound effects of the electronic instrument to the microphone input voice signal.

Claims (3)

It generates and outputs a microphone input unit for amplifying a voice signal input into a microphone and converting it into digital voice data under the control of a control unit and an effect sound processing unit, a keyboard unit for playing, and musical notes of the notes and tones played by the keyboard unit. A sound generation for controlling the analog / digital conversion of the microphone input unit, a control unit, an effect sound processing unit for controlling the microphone input unit to receive the input sound signal or the generated instrument sound signal, and processing the sound signal and output the sound signal; The microphone input sound effect electronic musical instrument, characterized in that it is composed of an output unit for converting the effect sound signal or the generated instrument sound signal to an analog signal and amplified and output to the speaker. The apparatus of claim 1, wherein the microphone input unit; A preamplifier 2 for amplifying a microphone input voice signal, an operational amplifier A1 for amplifying a voice signal input from a microphone, and a resistor R0-R4 for setting bias and amplification degree of the operational amplifier A1. And a low pass filter (3) including a condenser (C1-C8) and a variable resistor (VR1) for adjusting the operational amplifier output level, for removing noise from the voice signal amplified by the preamplifier and filtering only the voice signal components. And a low pass filter including an operational amplifier A2 for removing noise of an input voice signal, resistors R5-R7 and capacitors C9-C12 for determining filtering frequency characteristics of the operational amplifier. An A / D converter 4 for converting the analog voice signal filtered in (3) into digital voice data, which receives a reference voltage circuit 4A for supplying a reference voltage for analog / digital conversion, and receives the reference voltage. Well A / D converter (IC) 4B for digitally converting and outputting a sex signal, and output control signal WSBD (CLBD) of the sound generator 10 to decode and write the light (/ WR) of the A / D converter. A second timing controller for controlling the read timing of the A / D converter by decoding the first timing controller 4C for controlling the timing and the output control signal (/ PMS) (/ DRD) of the sound effect processor. Microphone input acoustics electronic instruments, including (4D). 3. The reference voltage circuit 4A includes a resistor R8 and a Zener diode ZD1 for stabilizing an input power supply, an output transistor TR1 switched on / off of the Zener voltage as an input, and a ripple. The first timing adjusting unit 4C includes a flip-flop 19 for delaying sound generation and the input signal WSBD from the control unit, and the flip-flop 19. The exclusive oragate 20 outputting the frame signal FRAME by exclusively ORing the output and the input signal WSBD, and the control signal / SCON by A and OR of the frame signal and the input signal WSBD. And an orifice 21 for outputting to the / D converter 4B, and the second timing adjusting unit 4D is an ORG for outputting by logically combining the input signal / PMS (/ DRD) of the sound effect processing unit. 22), an inverter 23 for inverting the input signal DA0, the inverted signal and the oragate 22 A microphone input sound effect electronic musical instrument comprising an oragate (24) for outputting a control signal (/ SEL0) to the A / D converter (4B) by ORing the output.