Audio processing circuit
By combining MCU, digital-to-analog converter chip, audio chip and SOC chip, and with a variety of sound effect processing modules, the problems of limited functionality and poor sound quality of karaoke effects processors have been solved. High-fidelity audio sampling and diversified sound effect processing have been achieved, improving sound quality and functional expansion capabilities.
Patent Information
- Application Number
- CN202520140886.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-21
AI Technical Summary
The effects processors currently used in the karaoke industry have simple functions, cannot add extra features, and have poor sound quality, with the output sound distorted from the original sound.
It employs a combination circuit of MCU, digital-to-analog converter chip, audio chip, SOC chip and DSP module, combined with chips such as AK7707, AK4493S and RK3588, to achieve high-fidelity audio sampling and various sound effect processing, including MIX module, EQ module, reverb module, echo module, etc., and supports external expansion functions.
It achieves high-fidelity audio sampling and sound quality enhancement, supports various sound effects processing, has high sound reproduction accuracy, and has external expansion capabilities.
Smart Images
Figure CN223828221U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to signal processing technical field, especially relate to an audio processing circuit. BACKGROUND
[0002] In the existing karaoke industry, the effecter is generally used to process the singing voice of the user, the user's voice is sampled through the effecter, and then the corresponding voice effect is added before output, but the function of the existing effecter is simple, and it has no other functions except adding effects to the user's voice, and it is also impossible to increase other functions, and the output sound quality is poor, and the output sound is greatly distorted from the original sound of the user. SUMMARY
[0003] In order to make up for the deficiencies of the prior art, the application provides an audio processing circuit to solve the problems in the prior art.
[0004] In order to solve the above technical problems, the utility model provides the following technical scheme:
[0005] An audio processing circuit, comprising MCU, digital-analog conversion chip, audio chip one, audio chip two, SOC chip and DSP module, the MCU is connected with the digital-analog conversion chip, audio chip one, audio chip two, SOC chip and DSP module respectively, and the DSP module is also connected with the digital-analog conversion chip, audio chip one, audio chip two, SOC chip and external DSP module respectively.
[0006] As a further technical scheme of the utility model: the model of the DSP module is AK7707, comprising MIX module, 15-section microphone EQ module, 3-section effect EQ module, reverberation module, echo module, volume module, compression module, 7-section EQ effect module, volume control module, high-low switching module and switcher.
[0007] As a further technical scheme of the utility model: the model of the MCU is N32G435CBL7.
[0008] As a further technical scheme of the utility model: the model of the SOC chip is RK3588.
[0009] As a further technical scheme of the utility model: the model of the digital-analog conversion chip is AK5702.
[0010] As a further technical scheme of the utility model: the model of the audio chip one and the audio chip two is AK4493S.
[0011] One or more technical solutions provided in the application embodiment have at least the following technical effects or advantages:
[0012] The utility model discloses an audio processing circuit realizes high fidelity audio sampling through 192KHZ's sampling rate, and the sound quality is better, and the sound restoration degree is higher compared with prior art, in addition, EXT_DSP module, SOC RK3588 module belong to the module that external customization can be realized, and the external extension of different functions can be realized. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is the overall circuit diagram of the utility model. DETAILED DESCRIPTION
[0014] The technical scheme in the embodiments of the utility model will be described clearly and completely below, obviously, the described embodiments only are a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making the creative labor all belong to the range of the utility model protection.
[0015] As Figure 1 Indicated, an audio processing circuit, including MCU, digital analog conversion chip, audio chip one, audio chip two, SOC chip and DSP module, the MCU connects digital analog conversion chip, audio chip one, audio chip two, SOC chip and DSP module respectively, and the DSP module still connects digital analog conversion chip, audio chip one, audio chip two, SOC chip and external DSP module respectively.
[0016] The model of DSP module is AK7707, including MIX module, 15 segment microphone EQ module, 3 segment effect EQ module, reverberation module, echo module, volume module, compression module, 7 segment EQ effect module, volume control module, high low switching module and switch.
[0017] Working principle is as follows:
[0018] Firstly, the sound is collected by AK5572 through I2S, and then the audio signal is output to the Noisegate module. The Noisegate module performs noise reduction processing on the audio signal, and then outputs the audio signal to the volume module. The volume module adjusts the volume of the audio signal, and then outputs the audio signal to the compressor module. The compressor module controls the dynamic range of the audio signal, and then the signal is divided into three paths. The first path is output to the SOC for recording operation after being processed by 15 recording EQs and volume controls; the second path is directly output to the SOC for microphone original sound analysis; the third path is output to the 15 microphone EQ module. The microphone EQ module performs equalization processing on the audio signal, and then the signal is divided into four paths. The first path is directly output to the MIX mixer module; the second path is output to the reverb module, which performs reverb effect processing and delay setting before outputting to the MIX mixer module; the third path is the echo direct sound; the fourth path is output to the 7 effect EQ module. The effect EQ module performs equalization processing on the audio signal, and then the signal is again divided into two paths. The first path is output to the echo module, which is combined with the echo direct sound after echo effect processing and delay adjustment, and then output to the MIX mixer module; the second path is output to the EXT_DSP module, which is processed by the external DSP before being output to the MIX mixer module. The DSP AK7709 also provides an interface for receiving music signals from the SOC. This signal is first processed by the volume module, the compressor module, and the 7 EQ effect module, in sequence, and then output to the MIX mixer module. The MIX mixer module performs arbitrary percentage mixing of the MIC, reverb, echo, MUSIC, and external DSP sound effects from 0% to 200%, and then outputs the mixed signal. The left and right full-frequency signals are output from the MIX mixer to the 5 EQ module, which performs equalization processing, and then the signals are respectively processed by the volume control and delay setting before being output to the first AK4493S left and right channels, which convert the digital signal to an analog signal and then play the sound. The left sound signal is separately output from the MIX mixer to the 3 EQ module, which performs equalization processing, and then the signal is output to the low-pass filter module, which filters the sound in a specific bass frequency range before outputting it to the bass and MUSIC switcher module. The MUSIC is separately output from the MIX mixer to the bass and MUSIC switcher module. The bass and MUSIC switcher module outputs the bass and MUSIC after switching between the two, and then the signal is output to the volume control module, which controls the volume and delay of the sound before outputting it to the left channel of the second AK4493S. The MIC signal is separately output from the MIX mixer to the volume control module, which controls the volume before outputting it to the right channel of the second AK4493S. The second AK4493S converts the digital signal to an analog signal and then plays the sound.
[0019] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and in no way limiting, the scope of the present application being defined by the claims hereafter rather than the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be comprised in the present application.
[0020] Furthermore, it should be understood that, although the present specification is described according to the embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the present specification as a whole, and the technical solutions in each embodiment are also appropriately combined to form other embodiments which are easily understood by a person skilled in the art.
Claims
1. An audio processing circuit, comprising an MCU, a digital-to-analog converter chip, an audio chip one, an audio chip two, a SOC chip, and a DSP module, characterized in that: The MCU is connected to the digital-to-analog converter chip, audio chip one, audio chip two, SOC chip and DSP module respectively. The DSP module is also connected to the digital-to-analog converter chip, audio chip one, audio chip two, SOC chip and external DSP module respectively.
2. The audio processing circuit according to claim 1, characterized in that, The DSP module, model AK7707, includes a MIX module, a 15-band microphone EQ module, a 3-band effects EQ module, a reverb module, an echo module, a volume module, a compression module, a 7-band EQ effects module, a volume control module, a high / low switching module, and a switcher.
3. The audio processing circuit according to claim 1, characterized in that, The MCU model is N32G435CBL7.
4. The audio processing circuit according to claim 1, characterized in that, The SOC chip is model RK3588.
5. An audio processing circuit according to claim 1, characterized in that, The digital-to-analog converter chip is model AK5702.
6. An audio processing circuit according to claim 1, characterized in that, Both audio chip one and audio chip two are model AK4493S.