Sound effect processing circuit

Abstract

The utility model discloses a sound effect processing circuit, and relates to the technical field of audio processing. According to the main technical scheme, the device comprises a signal input module, a conversion module, a signal processing module, a signal amplification module, a sound effect processing module and an output module, the conversion module comprises a band switch K1, a first conversion unit and a second conversion unit, and the first conversion unit and the second conversion unit are both connected with the signal input module; the band switch K1 is used for connecting the output end of the first conversion unit or the output end of the second conversion unit; the signal processing module is connected with the band switch K1; the input end of the signal amplification module is connected with the output end of the band switch K1 and the output end of the signal processing module; the input end of the sound effect processing module is connected with the output end of the signal amplification module; the input end of the output module is connected with the output end of the sound effect processing module. By connecting different resistors and capacitors, the purpose of outputting different audio inputs with better tone quality is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of audio processing, in particular to a sound effect processing circuit. Background Art

[0002] Existing audio processing modules are often precisely tuned for specific audio source signal strength and impedance, effectively ensuring optimal sound quality under ideal conditions. However, when faced with audio sources whose parameters deviate from the preset standards, the expected sound quality optimization effect cannot be achieved.

[0003] Therefore, it is an urgent problem to provide an audio processing technology that can adapt to audio inputs of different signal strengths and impedances and achieve better sound quality output. Utility Model Content

[0004] The purpose of the present utility model is to provide an audio processing circuit that selects different resistors and capacitors through a band switch K1 to adapt to audio inputs with different signal strengths and impedances, thereby achieving the purpose of achieving better sound quality output for different audio inputs.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A sound effect processing circuit includes a signal input module, a conversion module, a signal processing module, a signal amplification module, a sound effect processing module and an output module, wherein the signal input module is used to receive an audio signal; the conversion module includes a band switch K1, a first conversion unit and a second conversion unit, wherein the input end of the first conversion unit and the input end of the second conversion unit are both connected to the signal input module; the input end of the band switch K1 is used to connect to the output end of the first conversion unit or the output end of the second conversion unit; the signal processing module is connected to the band switch K1; the input end of the signal amplification module is connected to the output end of the band switch K1 and the output end of the signal processing module; the input end of the sound effect processing module is connected to the output end of the signal amplification module; and the input end of the output module is connected to the output end of the sound effect processing module.

[0007] A further solution is: the signal input module is a connector XLR-7; pins R, T, 2, and 3 of the connector XLR-7 are all connected to the input end of the first conversion unit, and pins R, T, 2, and 3 of the connector XLR-7 are all connected to the input end of the second conversion unit; pins S, G, and 1 of the connector XLR-7 are all grounded.

[0008] A further solution is: the first conversion unit includes a first impedance conversion area and a first sound effect conversion area; the first impedance conversion area includes a resistor R43; the first sound effect conversion area includes a resistor R2, a resistor R20, a capacitor C2, a capacitor C20 and a capacitor C25; one end of the resistor R43 is connected to both pins R and 3 of the connector XLR-7; the other end of the resistor R43 is connected to pin 4 of the band switch K1; one end of the resistor R2 and one end of the capacitor C25 are connected to the The first and second ends of the resistor R2 and the second end of the capacitor C25 are connected to pin T of the connector XLR-7, and one end of the resistor R2 and one end of the capacitor C25 are both connected to pin 2 of the connector XLR-7; the other end of the resistor R2 is connected to one end of the capacitor C2; the other end of the capacitor C2, the other end of the capacitor C25, and one end of the resistor R20 are all connected to pin 12 of the band switch K1; the other end of the resistor R20 is grounded; one end of the capacitor C20 is connected to pin 16 of the band switch K1; the other end of the capacitor C20 is grounded.

[0009] A further solution is: the second conversion unit includes a second impedance conversion area and a second sound effect conversion area; the second impedance conversion area includes a resistor R42; the second sound effect conversion area includes a resistor R1, a resistor R9, a capacitor C1, a capacitor C14, and a capacitor C16; one end of the resistor R42 is connected to both pins R and 3 of the connector XLR-7; the other end of the resistor R42 is connected to pin 3 of the band switch K1; one end of the resistor R1 and one end of the capacitor C14 are both connected to pin T of the connector XLR-7, and one end of the resistor R1 and one end of the capacitor C14 are both connected to pin 2 of the connector XLR-7; the other end of the resistor R1 is connected to one end of the capacitor C1; the other end of the capacitor C1, the other end of the capacitor C14, and one end of the resistor R9 are all connected to pin 11 of the band switch K1; one end of the capacitor C16 is connected to pin 15 of the band switch K1; the other end of the resistor R9 and the other end of the capacitor C16 are both grounded.

[0010] A further solution is: the conversion module also includes a third conversion unit; the third conversion unit includes a resistor R3, a resistor R22, a resistor R24 ​​and a capacitor C3; one end of the resistor R24 ​​is connected to both pins R and 3 of the connector XLR-7; the other end of the resistor R24 ​​is connected to pin 1 of the band switch K1; one end of the resistor R3 and one end of the resistor R22 are both connected to pin T of the connector XLR-7, and one end of the resistor R3 and one end of the resistor R22 are both connected to pin 2 of the connector XLR-7; the other end of the resistor R3 is connected to one end of the capacitor C1; the other end of the resistor R22 and the other end of the capacitor C1 are both connected to pin 5 of the band switch K1.

[0011] A further solution is: the signal processing module includes an operational amplifier U1A, a resistor R7, a resistor R25, a resistor R44, a resistor R45, a capacitor C32, a capacitor C45, a capacitor C124, a capacitor C132 and a diode D1; one end of the resistor R25 is connected to pin 10 of the band switch K1; the other end of the resistor R25, pin 14 of the band switch K1, one end of the resistor R7, and the cathode of the diode D1 are all connected to pin 3 of the operational amplifier U1A; the other end of the resistor R7 is grounded; pin 4 of the operational amplifier U1A, one end of the capacitor C32, and one end of the capacitor C132 are connected to the are all used to connect to 5V-; the other end of the capacitor C32 and the other end of the capacitor C132 are both grounded; pin 1 of the operational amplifier U1A, pin 2 of the operational amplifier U1A, the positive electrode of the diode D1, and one end of the resistor R45 are all connected to one end of the resistor R44; pin 8 of the operational amplifier U1A, one end of the capacitor C45, and one end of the capacitor C124 are all connected to 5V+; the other end of the capacitor C45 and the other end of the capacitor C124 are both grounded; the other end of the resistor R45 is connected to pin 7 of the band switch; the other end of the resistor R44 is connected to pin 8 of the band switch.

[0012] A further solution is: the signal amplification module includes an operational amplifier U1B, a capacitor C18, a capacitor C50, a capacitor C53, a resistor R54, a resistor R56, a resistor R59 and a resistor R60; one end of the capacitor C50 is connected to pin 2 of the band switch K1; the other end of the capacitor C50 is connected to one end of the resistor R60; the other end of the resistor R60 is connected to one end of the resistor R56, one end of the capacitor C18, and pin 6 of the operational amplifier U1B; the other end of the capacitor C18, the other end of the resistor R56, and pin 7 of the operational amplifier U1B are all connected to the input end of the sound processing module; one end of the capacitor C53 is connected to pin 6 of the band switch K1; the other end of the capacitor C53 is connected to one end of the resistor R59; the other end of the resistor R59 and one end of the resistor R54 are both connected to pin 5 of the operational amplifier U1B; the other end of the resistor R54 is grounded.

[0013] A further solution is: the sound effect processing module includes an operational amplifier U2A, a capacitor C56, a capacitor C58, a capacitor C68, a capacitor C69, a capacitor C82, a resistor R11, a resistor R69, a resistor R70, a resistor R84, a resistor R85, a resistor R88, a potentiometer W3 and a potentiometer W5; one end of the capacitor C56 is connected to the other end of the capacitor C18, the other end of the resistor R56, and pin 7 of the operational amplifier U1B; the other end of the capacitor C56 is connected to one end of the resistor R69 and one end of the resistor R84; the other end of the resistor R69 is connected to pin 3 of the potentiometer W5; and pin 1 of the potentiometer W5 is connected to one end of the resistor R70; Pin 2 of the potentiometer is connected to one end of the capacitor C58; the other end of the resistor R84 is connected to one end of the capacitor C68 and pin 3 of the potentiometer W3; the other end of the capacitor C68 is connected to one end of the resistor R88, pin 2 of the potentiometer W3, and one end of the capacitor C69; the other end of the resistor R88, the other end of the capacitor C58, one end of the resistor R11, and one end of the capacitor C82 are all connected to pin 2 of the operational amplifier U2A; pin 1 of the potentiometer W3, the other end of the capacitor C69, pin 1 of the operational amplifier U2A, the other end of the resistor R11, the other end of the capacitor C82, and the other end of the resistor R70 are all connected to the input end of the output module.

[0014] A further solution is: the output module includes potentiometer W1, potentiometer W7, resistor R76 and resistor R78; pin 3 of the potentiometer W7 is connected to pin 1 of the potentiometer W3, the other end of capacitor C69, pin 1 of the operational amplifier U2A, the other end of resistor R11, the other end of capacitor C82, and the other end of resistor R70; pin 2 of the potentiometer W7 is connected to one end of the resistor R78 and pin 3 of the potentiometer W1; pin 2 of the potentiometer W1 is connected to one end of the resistor R76; pin 1 of the potentiometer W1 and pin 1 of the potentiometer W7 are both grounded; wherein, the other end of the resistor R78 is used for the first output end; the other end of the resistor R76 is used for the second output end.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] Through the band switch K1, different resistors and capacitors are selected to adapt to audio inputs with different signal strengths and impedances, thereby achieving the purpose of achieving better sound quality output for different audio inputs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an electrical block diagram of a sound effect processing circuit in this embodiment;

[0018] Figure 2 FIG. 4 is a circuit topology diagram of a sound effect processing circuit in this embodiment.

[0019] Markings and corresponding parts names in the accompanying drawings:

[0020] 100-Signal input module; 200-Conversion module; 300-Signal processing module; 400-Signal amplification module; 500-Sound effect processing module; 600-Output module. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Embodiment: This embodiment provides a sound effect processing circuit, such as Figure 1 As shown, it includes a signal input module 100, a conversion module 200, a signal processing module 300, a signal amplification module 400, a sound effect processing module 500 and an output module 600. The signal input module 100 is used to receive audio signals; the conversion module 200 includes a band switch K1, a first conversion unit and a second conversion unit, the input end of the first conversion unit and the input end of the second conversion unit are both connected to the signal input module 100; the input end of the band switch K1 is used to connect to the output end of the first conversion unit or the output end of the second conversion unit; the signal processing module 300 is connected to the band switch K1; the input end of the signal amplification module 400 is connected to the output end of the band switch K1 and the output end of the signal processing module 300; the input end of the sound effect processing module 500 is connected to the output end of the signal amplification module 400; the input end of the output module 600 is connected to the output end of the sound effect processing module 500.

[0023] Band switch K1 is a four-gang, three-speed band switch consisting of four parts: K1A, K1B, K1C, and K1D. Pins 1, 2, 3, and 4 of band switch K1 correspond to pins 1, 2, 3, and 4 of K1A; pins 5, 6, 7, and 8 of band switch K1 correspond to pins 5, 6, 7, and 8 of K1B; pins 9, 10, 11, and 12 of band switch K1 correspond to pins 9, 10, 11, and 12 of K1C; and pins 13, 14, 15, and 16 of band switch K1 correspond to pins 13, 14, 15, and 16 of K1D.

[0024] In this embodiment, if Figure 2As shown, the signal input module 100 is a connector XLR-7; pins R, T, 2, and 3 of the connector XLR-7 are all connected to the input end of the first conversion unit, and pins R, T, 2, and 3 of the connector XLR-7 are all connected to the input end of the second conversion unit; pins S, G, and 1 of the connector XLR-7 are all grounded.

[0025] In this embodiment, the first conversion unit includes a first impedance conversion area and a first sound effect conversion area; the first impedance conversion area includes a resistor R43; the first sound effect conversion area includes a resistor R2, a resistor R20, a capacitor C2, a capacitor C20 and a capacitor C25; one end of the resistor R43 is connected to both pins R and 3 of the connector XLR-7; the other end of the resistor R43 is connected to pin 4 of the band switch K1; one end of the resistor R2 and one end of the capacitor C25 are both connected to the connector The T pin of the XLR-7 is connected, and one end of the resistor R2 and one end of the capacitor C25 are both connected to pin 2 of the connector XLR-7; the other end of the resistor R2 is connected to one end of the capacitor C2; the other end of the capacitor C2, the other end of the capacitor C25, and one end of the resistor R20 are all connected to pin 12 of the band switch K1; the other end of the resistor R20 is grounded; one end of the capacitor C20 is connected to pin 16 of the band switch K1; and the other end of the capacitor C20 is grounded.

[0026] In this embodiment, if Figure 2 As shown, the second conversion unit includes a second impedance conversion area and a second sound effect conversion area; the second impedance conversion area includes a resistor R42; the second sound effect conversion area includes a resistor R1, a resistor R9, a capacitor C1, a capacitor C14 and a capacitor C16; one end of the resistor R42 is connected to both pins R and 3 of the connector XLR-7; the other end of the resistor R42 is connected to pin 3 of the band switch K1; one end of the resistor R1 and one end of the capacitor C14 are both connected to pin T of the connector XLR-7, and one end of the resistor R1 and one end of the capacitor C14 are both connected to pin 2 of the connector XLR-7; the other end of the resistor R1 is connected to one end of the capacitor C1; the other end of the capacitor C1, the other end of the capacitor C14 and one end of the resistor R9 are all connected to pin 11 of the band switch K1; one end of the capacitor C16 is connected to pin 15 of the band switch K1; the other end of the resistor R9 and the other end of the capacitor C16 are both grounded.

[0027] In this embodiment, if Figure 2As shown, the conversion module 200 also includes a third conversion unit; the third conversion unit includes a resistor R3, a resistor R22, a resistor R24 ​​and a capacitor C3; one end of the resistor R24 ​​is connected to both pins R and 3 of the connector XLR-7; the other end of the resistor R24 ​​is connected to pin 1 of the band switch K1; one end of the resistor R3 and one end of the resistor R22 are both connected to pin T of the connector XLR-7, and one end of the resistor R3 and one end of the resistor R22 are both connected to pin 2 of the connector XLR-7; the other end of the resistor R3 is connected to one end of the capacitor C1; the other end of the resistor R22 and the other end of the capacitor C1 are both connected to pin 5 of the band switch K1.

[0028] In this embodiment, if Figure 2 As shown, the signal processing module 300 includes an operational amplifier U1A, a resistor R7, a resistor R25, a resistor R44, a resistor R45, a capacitor C32, a capacitor C45, a capacitor C124, a capacitor C132 and a diode D1; one end of the resistor R25 is connected to pin 10 of the band switch K1; the other end of the resistor R25, pin 14 of the band switch K1, one end of the resistor R7, and the cathode of the diode D1 are all connected to pin 3 of the operational amplifier U1A; the other end of the resistor R7 is grounded; pin 4 of the operational amplifier U1A, one end of the capacitor C32, and one end of the capacitor C132 are all connected Used to connect to 5V-; the other end of the capacitor C32 and the other end of the capacitor C132 are both grounded; pin 1 of the operational amplifier U1A, pin 2 of the operational amplifier U1A, the positive electrode of the diode D1, and one end of the resistor R45 are all connected to one end of the resistor R44; pin 8 of the operational amplifier U1A, one end of the capacitor C45, and one end of the capacitor C124 are all connected to 5V+; the other end of the capacitor C45 and the other end of the capacitor C124 are both grounded; the other end of the resistor R45 is connected to pin 7 of the band switch; the other end of the resistor R44 is connected to pin 8 of the band switch.

[0029] In this embodiment, if Figure 2As shown, the signal amplification module 400 includes an operational amplifier U1B, a capacitor C18, a capacitor C50, a capacitor C53, a resistor R54, a resistor R56, a resistor R59 and a resistor R60; one end of the capacitor C50 is connected to pin 2 of the band switch K1; the other end of the capacitor C50 is connected to one end of the resistor R60; the other end of the resistor R60 is connected to one end of the resistor R56, one end of the capacitor C18, and pin 6 of the operational amplifier U1B; the other end of the capacitor C18, the other end of the resistor R56, and pin 7 of the operational amplifier U1B are all connected to the input end of the sound effect processing module 500; one end of the capacitor C53 is connected to pin 6 of the band switch K1; the other end of the capacitor C53 is connected to one end of the resistor R59; the other end of the resistor R59 and one end of the resistor R54 are both connected to pin 5 of the operational amplifier U1B; the other end of the resistor R54 is grounded.

[0030] In this embodiment, if Figure 2 As shown, the sound effect processing module 500 includes an operational amplifier U2A, a capacitor C56, a capacitor C58, a capacitor C68, a capacitor C69, a capacitor C82, a resistor R11, a resistor R69, a resistor R70, a resistor R84, a resistor R85, a resistor R88, a potentiometer W3 and a potentiometer W5; one end of the capacitor C56 is connected to the other end of the capacitor C18, the other end of the resistor R56, and pin 7 of the operational amplifier U1B; the other end of the capacitor C56 is connected to one end of the resistor R69 and one end of the resistor R84; the other end of the resistor R69 is connected to pin 3 of the potentiometer W5; pin 1 of the potentiometer W5 is connected to one end of the resistor R70; Pin 2 of the potentiometer is connected to one end of the capacitor C58; the other end of the resistor R84 is connected to one end of the capacitor C68 and pin 3 of the potentiometer W3; the other end of the capacitor C68 is connected to one end of the resistor R88, pin 2 of the potentiometer W3, and one end of the capacitor C69; the other end of the resistor R88, the other end of the capacitor C58, one end of the resistor R11, and one end of the capacitor C82 are all connected to pin 2 of the operational amplifier U2A; pin 1 of the potentiometer W3, the other end of the capacitor C69, pin 1 of the operational amplifier U2A, the other end of the resistor R11, the other end of the capacitor C82, and the other end of the resistor R70 are all connected to the input end of the output module 600.

[0031] In this embodiment, if Figure 2As shown, the output module 600 includes a potentiometer W1, a potentiometer W7, a resistor R76 and a resistor R78; pin 3 of the potentiometer W7 is connected to pin 1 of the potentiometer W3, the other end of the capacitor C69, pin 1 of the operational amplifier U2A, the other end of the resistor R11, the other end of the capacitor C82, and the other end of the resistor R70; pin 2 of the potentiometer W7 is connected to one end of the resistor R78 and pin 3 of the potentiometer W1; pin 2 of the potentiometer W1 is connected to one end of the resistor R76; pin 1 of the potentiometer W1 and pin 1 of the potentiometer W7 are both grounded; wherein, the other end of the resistor R78 is used for the first output end; the other end of the resistor R76 is used for the second output end.

[0032] The working principle of the sound effect processing circuit in this embodiment is as follows:

[0033] The XLR-7 connector is a multifunctional combination caron socket that can be used for XLR balanced or unbalanced signal input, as well as 6.35 jacket balanced or unbalanced signal input.

[0034] Band switch K1 is a quadruple three-band switch that can switch between LINE signal input, GUTITAR signal input or MIC signal input.

[0035] When the band switch K1 is moved to connect pins 1 and 2, pins 5 and 6, pins 9 and 10, and pins 13 and 14, resistors R24, R3, R22, and capacitor C3 are connected, forming a third conversion unit for LINE signal input. At this point, the audio processing circuit switches to LINE signal input.

[0036] When a LINE signal is connected to the XLR-7 connector, it is balanced by capacitors C50, C53, resistors R60, and R59 before being amplified by operational amplifier U1B, resistor R56, and capacitor C18. Capacitor C56 is a signal coupling capacitor. Resistors R69, R70, potentiometer W5, and capacitor C58 form the treble adjustment section. Potentiometer W5 is the treble potentiometer. Sliding it left increases the treble, while sliding it right reduces the treble. Resistors R84, R88, R85, potentiometer W3, capacitor C68, and capacitor C69 form the bass adjustment section. Potentiometer W3 is the bass potentiometer. Sliding it left increases the bass, while sliding it right reduces the bass.

[0037] Capacitor C82 and resistor R11 are used for balancing to reduce the risk of instability of operational amplifier U2A.

[0038] When the band switch K1 is moved to connect pins 3 and 2, pins 7 and 6, pins 11 and 10, and pins 15 and 14, resistor R42 is connected, forming a second impedance conversion region for the GUTITAR (guitar) signal input. Furthermore, resistors R1, R9, R45, capacitors C1, C14, and C16 are connected, forming a second sound effect conversion region for the GUTITAR (guitar) signal input. This second sound effect conversion region is used for sound effect processing of the GUTITAR (guitar) signal input. At this point, the sound effect processing circuit is switched to the GUTITAR (guitar) signal input.

[0039] When a GUTITAR (guitar) signal is connected to connector XLR-7, it is amplified by diode D1 and operational amplifier U1A. After being balanced by capacitors C50, C53, resistors R60, and R59, the signal is amplified by operational amplifier U1B, resistor R56, and capacitor C18. Capacitor C56 is a signal coupling capacitor. Resistors R69, R70, potentiometer W5, and capacitor C58 form the treble adjustment section. Potentiometer W5 is the treble adjustment potentiometer. Sliding it left increases the treble, while sliding it right reduces the treble. Resistors R84, R88, R85, potentiometer W3, capacitor C68, and capacitor C69 form the bass adjustment section. Potentiometer W3 is the bass adjustment potentiometer. Sliding it left increases the bass, while sliding it right reduces the bass.

[0040] Capacitor C82 and resistor R11 are used for balancing to reduce the risk of instability of operational amplifier U2A.

[0041] When the band switch K1 is toggled so that pins 4 and 2 are connected, pins 8 and 6 are connected, pins 12 and 10 are connected, and pins 16 and 14 are connected, resistor R43 is connected, forming a first impedance conversion zone for MIC (microphone) signal input. Furthermore, resistors R2, R20, R44, capacitors C2, C20, and C25 are connected, forming a first sound effect conversion zone for MIC (microphone) signal input. This first sound effect conversion zone is used for sound effect processing of the MIC (microphone) signal input. At this point, the sound effect processing circuit is switched to MIC (microphone) signal input.

[0042] When a microphone signal is connected to connector XLR-7, it is amplified by diode D1 and operational amplifier U1A. After being balanced by capacitors C50, C53, resistors R60, and R59, the signal is amplified by operational amplifier U1B, resistor R56, and capacitor C18. Capacitor C56 is a signal coupling capacitor. Resistors R69, R70, potentiometer W5, and capacitor C58 form the treble adjustment section. Potentiometer W5 is the treble adjustment potentiometer. Sliding it left increases the treble, while sliding it right reduces the treble. Resistors R84, R88, R85, potentiometer W3, capacitor C68, and capacitor C69 form the bass adjustment section. Potentiometer W3 is the bass adjustment potentiometer. Sliding it left increases the bass, while sliding it right reduces the bass.

[0043] Capacitor C82 and resistor R11 are used for balancing to reduce the risk of instability of operational amplifier U2A.

[0044] When in use, you can connect an effector to the first output terminal (the other end of resistor R78) to generate the main output MAIN_OUT, and at the same time connect an effector to the first output terminal (the other end of resistor R76) to generate the REVERB_OUT effect output. The main output MAIN_OUT and REVERB_OUT effects are mixed to achieve the desired sound effect.

[0045] Through the band switch K1, different resistors and capacitors are selected to adapt to audio inputs with different signal strengths and impedances, thereby achieving the purpose of achieving better sound quality output for different audio inputs.

[0046] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, numerous variations and modifications may be made to the components and / or arrangement of the subject combination arrangement. In addition to variations and modifications to the components and / or arrangement, other uses will also be apparent to those skilled in the art.

Claims

1. A sound effect processing circuit, characterized in that: include: A signal input module (100), the signal input module (100) is used to receive an audio signal; A conversion module (200), comprising a band switch K1, a first conversion unit, and a second conversion unit, wherein the input end of the first conversion unit and the input end of the second conversion unit are both connected to the signal input module (100); the input end of the band switch K1 is used to connect to the output end of the first conversion unit or the output end of the second conversion unit; a signal processing module (300), the signal processing module (300) being connected to the band switch K1; a signal amplifying module (400), wherein the input end of the signal amplifying module (400) is connected to the output end of the band switch K1 and the output end of the signal processing module (300); A sound effect processing module (500), wherein the input end of the sound effect processing module (500) is connected to the output end of the signal amplification module (400); An output module (600), wherein the input end of the output module (600) is connected to the output end of the sound effect processing module (500).

2. The sound processing circuit according to claim 1, wherein: The signal input module (100) is a connector XLR-7; Pins R, T, 2, and 3 of the XLR-7 connector are all connected to the input end of the first conversion unit, and pins R, T, 2, and 3 of the XLR-7 connector are all connected to the input end of the second conversion unit; Pins S, G, and 1 of the XLR-7 connector are all grounded.

3. The sound effect processing circuit according to claim 2, wherein: The first conversion unit includes a first impedance conversion area and a first sound effect conversion area; The first impedance conversion region includes a resistor R43; The first sound effect conversion area includes a resistor R2, a resistor R20, a capacitor C2, a capacitor C20 and a capacitor C25; One end of the resistor R43 is connected to both pins R and 3 of the connector XLR-7; The other end of the resistor R43 is connected to pin 4 of the band switch K1; One end of the resistor R2 and one end of the capacitor C25 are both connected to pin T of the connector XLR-7, and one end of the resistor R2 and one end of the capacitor C25 are both connected to pin 2 of the connector XLR-7; The other end of the resistor R2 is connected to one end of the capacitor C2; The other end of the capacitor C2, the other end of the capacitor C25, and one end of the resistor R20 are all connected to pin 12 of the band switch K1; The other end of the resistor R20 is grounded; One end of the capacitor C20 is connected to pin 16 of the band switch K1; The other end of the capacitor C20 is grounded.

4. The sound effect processing circuit according to claim 3, wherein: The second conversion unit includes a second impedance conversion area and a second sound effect conversion area; The second impedance conversion region includes a resistor R42; The second sound effect conversion area includes a resistor R1, a resistor R9, a capacitor C1, a capacitor C14 and a capacitor C16; One end of the resistor R42 is connected to both pins R and 3 of the connector XLR-7; The other end of the resistor R42 is connected to pin 3 of the band switch K1; One end of the resistor R1 and one end of the capacitor C14 are both connected to pin T of the connector XLR-7, and one end of the resistor R1 and one end of the capacitor C14 are both connected to pin 2 of the connector XLR-7; The other end of the resistor R1 is connected to one end of the capacitor C1; The other end of the capacitor C1, the other end of the capacitor C14, and one end of the resistor R9 are all connected to pin 11 of the band switch K1; One end of the capacitor C16 is connected to pin 15 of the band switch K1; The other end of the resistor R9 and the other end of the capacitor C16 are both grounded.

5. The sound effect processing circuit according to claim 4, wherein: The conversion module (200) further includes a third conversion unit; The third conversion unit includes a resistor R3, a resistor R22, a resistor R24 ​​and a capacitor C3; One end of the resistor R24 ​​is connected to both pins R and 3 of the connector XLR-7; The other end of the resistor R24 ​​is connected to pin 1 of the band switch K1; One end of the resistor R3 and one end of the resistor R22 are both connected to pin T of the connector XLR-7, and one end of the resistor R3 and one end of the resistor R22 are both connected to pin 2 of the connector XLR-7; The other end of the resistor R3 is connected to one end of the capacitor C1; The other end of the resistor R22 and the other end of the capacitor C1 are both connected to pin 5 of the band switch K1.

6. The sound effect processing circuit according to claim 5, wherein: The signal processing module (300) includes an operational amplifier U1A, a resistor R7, a resistor R25, a resistor R44, a resistor R45, a capacitor C32, a capacitor C45, a capacitor C124, a capacitor C132 and a diode D1; One end of the resistor R25 is connected to pin 10 of the band switch K1; The other end of the resistor R25, pin 14 of the band switch K1, one end of the resistor R7, and the cathode of the diode D1 are all connected to pin 3 of the operational amplifier U1A; The other end of the resistor R7 is grounded; Pin 4 of the operational amplifier U1A, one end of the capacitor C32, and one end of the capacitor C132 are all connected to 5V-; The other end of the capacitor C32 and the other end of the capacitor C132 are both grounded; Pin 1 of the operational amplifier U1A, pin 2 of the operational amplifier U1A, the anode of the diode D1, and one end of the resistor R45 are all connected to one end of the resistor R44; Pin 8 of the operational amplifier U1A, one end of the capacitor C45, and one end of the capacitor C124 are all connected to 5V+; The other end of the capacitor C45 and the other end of the capacitor C124 are both grounded; The other end of the resistor R45 is connected to pin 7 of the band switch; The other end of the resistor R44 is connected to pin 8 of the band switch.

7. The sound effect processing circuit according to claim 6, wherein: The signal amplification module (400) includes an operational amplifier U1 B, a capacitor C18, a capacitor C50, a capacitor C53, a resistor R54, a resistor R56, a resistor R59, and a resistor R60; One end of the capacitor C50 is connected to pin 2 of the band switch K1; The other end of the capacitor C50 is connected to one end of the resistor R60; The other end of the resistor R60 is connected to one end of the resistor R56, one end of the capacitor C18, and pin 6 of the operational amplifier U1 B; The other end of the capacitor C18, the other end of the resistor R56, and pin 7 of the operational amplifier U1 B are all connected to the input end of the sound effect processing module (500); One end of the capacitor C53 is connected to pin 6 of the band switch K1; The other end of the capacitor C53 is connected to one end of the resistor R59; The other end of the resistor R59 and one end of the resistor R54 are both connected to pin 5 of the operational amplifier U1 B; The other end of the resistor R54 is grounded.

8. The sound effect processing circuit according to claim 7, wherein: The sound effect processing module (500) includes an operational amplifier U2A, a capacitor C56, a capacitor C58, a capacitor C68, a capacitor C69, a capacitor C82, a resistor R11, a resistor R69, a resistor R70, a resistor R84, a resistor R85, a resistor R88, a potentiometer W3, and a potentiometer W5; One end of the capacitor C56 is connected to the other end of the capacitor C18, the other end of the resistor R56, and pin 7 of the operational amplifier U1 B; The other end of the capacitor C56 is connected to one end of the resistor R69 and one end of the resistor R84; The other end of the resistor R69 is connected to pin 3 of the potentiometer W5; Pin 1 of the potentiometer W5 is connected to one end of the resistor R70; Pin 2 of the potentiometer is connected to one end of the capacitor C58; The other end of the resistor R84 is connected to one end of the capacitor C68 and pin 3 of the potentiometer W3; The other end of the capacitor C68 is connected to one end of the resistor R88, pin 2 of the potentiometer W3, and one end of the capacitor C69; The other end of the resistor R88, the other end of the capacitor C58, one end of the resistor R11, and one end of the capacitor C82 are all connected to pin 2 of the operational amplifier U2A; Pin 1 of the potentiometer W3, the other end of the capacitor C69, pin 1 of the operational amplifier U2A, the other end of the resistor R11, the other end of the capacitor C82, and the other end of the resistor R70 are all connected to the input end of the output module (600).

9. The sound effect processing circuit according to claim 8, wherein: The output module (600) includes a potentiometer W1, a potentiometer W7, a resistor R76, and a resistor R78; Pin 3 of the potentiometer W7 is connected to pin 1 of the potentiometer W3, the other end of the capacitor C69, pin 1 of the operational amplifier U2A, the other end of the resistor R11, the other end of the capacitor C82, and the other end of the resistor R70; Pin 2 of the potentiometer W7 is connected to one end of the resistor R78 and pin 3 of the potentiometer W1; Pin 2 of the potentiometer W1 is connected to one end of the resistor R76; Pin 1 of the potentiometer W1 and pin 1 of the potentiometer W7 are both grounded; The other end of the resistor R78 is used for the first output end; the other end of the resistor R76 is used for the second output end.

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