Real-time tone detection microphone system
The real-time tone detection microphone system, which integrates a microphone, DSP, MCU and touch screen, solves the problems of high latency, complex operation and functional fragmentation in the existing technology, and realizes an efficient solution for real-time tone detection and multi-scenario applications.
Patent Information
- Application Number
- CN202511015682.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-23
- Publication Date
- 2025-10-17
AI Technical Summary
Existing tone detection solutions have problems such as high latency caused by hardware dependence, functional fragmentation and operational redundancy, closed interaction and lack of expansion, and cannot meet the needs of real-time feedback and multi-scenario applications.
The real-time tone detection microphone system integrates a microphone cavity, digital signal processor, microcontroller, and touchscreen display into a single housing. It uses a dual-core heterogeneous architecture to achieve low-latency audio streaming and real-time baseband detection via the I²S bus and UAC protocol, and supports bidirectional touchscreen control and parallel processing mechanisms.
It achieves real-time pitch detection with millisecond-level response, simplifies the operation process, provides an uninterrupted immersive experience, and supports multi-dimensional acoustic analysis to meet the needs of professional recording and educational scenarios.
Smart Images
Figure CN120812449A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of acoustic signal processing, in particular to a real-time pitch detection microphone system. BACKGROUND
[0002] The existing pitch detection scheme has serious limitations: first, hardware dependence leads to high delay. The traditional method needs to connect a tuner or a computer system to process the audio signal. Multiple transmission links (such as acoustic signal → analog electrical signal → external device digitization → algorithm analysis → result display) introduce significant delay (usually > 50 ms), which cannot meet the real-time feedback requirements of scenarios such as vocal training and instrument tuning. For example, singers need to repeatedly interrupt their performances to check the computer analysis results, which disrupts the coherence of the performance.
[0003] Second, the functions are fragmented and the operation is redundant. The sound collection, analysis and display links are separated: the clip-on tuner needs to be manually operated and only supports a single instrument; the USB microphone only transmits audio streams and needs to rely on mobile phone / computer software to realize pitch detection; users need to switch devices during performance, which is inefficient.
[0004] Third, the interaction is closed and there is a lack of expansion. Existing devices generally use physical buttons for control and cannot dynamically adjust audio processing parameters (such as gain, EQ) to optimize detection accuracy; they also cannot output lossless audio to the host computer in synchronization and transmit real-time pitch data, limiting their application in professional recording, live streaming and other scenarios.
[0005] Therefore, a real-time pitch detection microphone system is needed to solve the above problems. SUMMARY
[0006] The present application provides a real-time pitch detection microphone system to solve the problems of the prior art.
[0007] To solve the above technical problems, the present application is realized by the following technical scheme: in the first aspect, a real-time pitch detection microphone system, comprising: a microphone cavity for converting acoustic signals into analog electrical signals; Specifically, it includes: a microphone assembly and a digital signal processor; The microphone assembly is unidirectionally transmitted to the digital signal processor through an analog signal transmission path; The digital signal processor is used to convert the analog electrical signals into digital audio signals and output the audio stream in USB audio class format to an external host computer through a USB protocol interface; A microcontroller unit is connected to the digital signal processor through a digital audio interface and is used to receive the digital audio signals and execute a real-time fundamental frequency detection algorithm; The touch screen display is connected to the microcontroller unit through a display interface to display the base frequency data in real time, and sends audio parameter adjustment instructions to the microcontroller unit through a bidirectional control interface. The microcontroller unit forwards user instructions to the digital signal processor through the bidirectional control interface to dynamically adjust gain, equalization or noise suppression parameters. All components are integrated in a single housing to form a self-contained device without the need for external processing hardware.
[0008] In this application, by deeply integrating the microphone cavity, digital signal processor (DSP), microcontroller (MCU) and touch screen display in a single housing, the first completely independent real-time pitch detection intelligent microphone system is created, which fundamentally solves the three major pain points of high delay, complex operation and fragmented functions caused by the dependence on external processors in traditional solutions.
[0009] The core innovation point is embodied in three technical breakthroughs: a revolutionary dual-core heterogeneous architecture is adopted at the hardware level - the DSP is responsible for high-fidelity audio digitization and real-time UAC protocol encapsulation output, ensuring lossless transmission of professional-grade sound quality to the external host; the MCU directly captures digital audio streams through an exclusive I²S low-latency bus, running millisecond-level response base frequency detection algorithms (such as adaptive autocorrelation or FFT), achieving the conversion of acoustic signals to pitch data, and completely eliminating the signal delay introduced by external devices (actual measurement <10ms). A touch screen bidirectional control system is created at the interaction level, which not only visually presents frequency values, note names and dynamic tuning deviations (such as real-time color scale change pitch column), but also allows users to directly adjust the gain, EQ and noise reduction parameters of the DSP through gesture operations, simplifying the traditional computer / mobile phone software operation to fingertip touch control, providing uninterrupted immersive experience for music performers. A dual-path parallel processing mechanism is innovatively designed at the system architecture level - audio streams are synchronously driven through a single hardware interface to local MCU pitch analysis (I²S path) and host audio stack (UAC path), and a USB hub module can be optionally configured for revolutionary upgrade: this expansion scheme intelligently multiplexes DSP audio streams and MCU analysis data (HID / CDC protocol encapsulation) into a single composite stream through dual channels, allowing the host to simultaneously receive raw audio and real-time pitch information, providing pitch tracking API for vocal teaching software, creating automatic sound correction reference stream for recording studio DAW, and upgrading a single microphone to a multi-dimensional acoustic analysis terminal.
[0010] In a specific embodiment of the first aspect, the digital audio interface is an I²S bus protocol, which realizes low-latency audio stream transmission between the digital signal processor and the microcontroller unit.
[0011] In a specific implementation of the first aspect, the bidirectional control interface adopts a UART or I2C protocol for transmitting real-time control instructions of the touch screen display to the digital signal processor.
[0012] In a specific implementation of the first aspect, the touch screen display visualizes the fundamental frequency information, including a frequency value, a note name, and a real-time tuning deviation indication relative to a target pitch.
[0013] The digital signal processor performs in parallel: transmits UAC encapsulated data to an external host to support an operating system audio stack; transmits I2S data to a microcontroller unit to drive a local pitch detection algorithm.
[0014] In a specific implementation of the first aspect, the external host is externally provided with a USB physical port, which is directly connected with a USB protocol interface, so that the digital signal processor transmits a digitized audio stream to the external host.
[0015] In a specific implementation of the first aspect, the system is powered through the USB protocol interface and supports plug-and-play operation.
[0016] In a specific implementation of the first aspect, a USB hub is further included, which is arranged between the connection of the digital signal processor and the USB protocol interface, the USB hub is connected with the digital signal processor through a DSP-USB data channel, the USB hub is connected with the microcontroller unit through a MCU-USB data channel, and the USB hub is electrically connected with the USB protocol interface.
[0017] The second aspect relates to a real-time pitch detection method of a real-time pitch detection microphone system, which comprises the following steps: a first path: encapsulating the digital audio signal as I2S data and inputting the I2S data into a fundamental frequency detection algorithm, and outputting a result to a touch screen display for real-time display; a second path: encapsulating the digital audio signal as UAC encapsulated data and transmitting the UAC encapsulated data to a host audio stack; receiving user input instructions through the touch screen display, and dynamically adjusting audio processing parameters of the digital signal processor.
[0018] The present application has the following advantages: 1. The first independent real-time pitch detection intelligent microphone system in the world is created by deeply integrating microphone cavity, digital signal processor (DSP), microcontroller (MCU) and touch screen display in a single housing. The core breakthrough is the use of a dual-core heterogeneous architecture: the DSP is responsible for high-fidelity audio digitization and real-time USB audio class (UAC) protocol packaging, ensuring lossless transmission of professional-grade sound quality to the external host; the MCU directly captures the digital audio stream through the exclusive I²S low-latency bus, runs the millisecond-level response fundamental frequency detection algorithm, and realizes the instantaneous conversion of acoustic signals to pitch data. This design completely eliminates the signal delay and operation fragmentation caused by relying on external processors in traditional solutions, allowing music performers to monitor frequency values, note names and dynamic tuning deviation indicators (such as color change pitch columns) in real time through the touch screen without interrupting their performance. More revolutionary is the touch screen two-way closed-loop control created by the system - users can directly dynamically adjust the gain, equalization and noise reduction parameters of the DSP through touch gestures, simplifying the complex operations that traditionally rely on computer / mobile phone software to a fingertip touch, providing an uninterrupted immersive experience for vocal training, instrument tuning and other scenarios; 2. The application further reconstructs the audio stream transmission logic with a dual-path parallel processing architecture: a single hardware interface synchronously drives local MCU pitch analysis (I²S path) and host audio stack (UAC path), ensuring zero interference and realizing the collaborative work of device-side real-time feedback and host-side professional recording. The key is that the optional USB hub expansion scheme intelligently multiplexes the dual-data channel (DSP-USB audio stream + MCU-USB control stream) into a single composite stream, allowing the host to receive both raw audio and real-time pitch analysis data simultaneously. This design breaks through the traditional microphone's single-function boundary, upgrading the system to a multi-dimensional acoustic analysis terminal: host applications can directly call the pitch data stream generated by the MCU, providing pitch tracking API interfaces for vocal teaching software, creating automatic pitch correction reference streams for recording studio digital audio workstations (DAW), and even supporting firmware remote upgrades and multi-parameter batch configurations. All functions are powered by the USB bus and are plug-and-play, meeting the low-latency, high-precision needs of professional scenarios, and providing out-of-the-box portable solutions for education, live streaming and live performances. BRIEF DESCRIPTION OF DRAWINGS
[0019] Fig. 1 is the system core architecture diagram of the application.
[0020] Fig. 2 is the USB hub expansion architecture diagram of the application.
[0021] Fig. 3 is the dual-path signal processing flow diagram of the application.
[0022] Figs. 1 to 3In the middle: 101, microphone assembly; 102, digital signal processor; 103, microcontroller unit; 104, touch screen display; 105, analog signal transmission path; 106, digital audio interface; 107, bidirectional control interface; 108, display interface; 109, USB protocol interface; 110, microphone cavity; 120, external host; 121, USB physical port; 210, USB hub; 211, DSP-USB data channel; 212, MCU-USB data channel; 310, sound source signal; 320, digitized audio signal; 330, I²S data; 340, detection algorithm; 350, UAC encapsulated data; 360, audio stack. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0024] As shown in the real-time pitch detection microphone system. Figs. 1 to 3 As shown in the real-time pitch detection microphone system. A real-time pitch detection microphone system, comprising: a microphone cavity 110 for converting an acoustic signal into an analog electrical signal; Specifically comprising: a microphone assembly 101 and a digital signal processor 102; The microphone assembly 101 is unidirectionally transmitted to the digital signal processor 102 through the analog signal transmission path 105; The digital signal processor 102 is configured to convert the analog electrical signal into a digitized audio signal, and output an audio stream in a USB audio class format to an external host 120 through a USB protocol interface 109; The microcontroller unit 103 is connected with the digital signal processor 102 through a digital audio interface 106, configured to receive the digitized audio signal and execute a real-time fundamental frequency detection algorithm; The touch screen display 104 is connected with the microcontroller unit 103 through a display interface 108 to display the fundamental frequency data in real time, and sends an audio parameter adjustment instruction to the microcontroller unit 103 through a bidirectional control interface 107; The microcontroller unit 103 forwards the user instruction to the digital signal processor 102 through the bidirectional control interface 107 to dynamically adjust the gain, equalization or noise suppression parameters; All components are integrated in a single housing to form a self-contained device that does not require external processing hardware.
[0025] The digital audio interface 106 is an I²S bus protocol, which realizes low-delay audio stream transmission between the digital signal processor 102 and the microcontroller unit 103.
[0026] The bidirectional control interface 107 adopts a UART or I²C protocol, which is used to transmit real-time control instructions of the touch screen display 104 to the digital signal processor 102.
[0027] The touch screen display 104 visualizes the fundamental frequency information, including a frequency value, a note name, and a real-time tuning deviation indication relative to a target pitch.
[0028] The digital signal processor 102 performs the following operations in parallel: Transmitting UAC encapsulation data 350 to the external host 120 to support an operating system audio stack 360; Transmitting I²S data 330 to the microcontroller unit 103 to drive a local pitch detection algorithm 340.
[0029] The external host 120 is externally provided with a USB physical port 121, which is directly connected with the USB protocol interface 109, so that the digital audio stream of the digital signal processor 102 is transmitted to the external host 120.
[0030] The system takes power through the USB protocol interface 109 and supports plug-and-play operation.
[0031] Further, a USB hub 210 is arranged between the connection of the digital signal processor 102 and the USB protocol interface 109, the USB hub 210 is connected with the digital signal processor 102 through a DSP-USB data channel 211, the USB hub 210 is connected with the microcontroller unit 103 through a MCU-USB data channel 212, and the USB hub 210 is electrically connected with the USB protocol interface 109.
[0032] A real-time pitch detection method of a real-time pitch detection microphone system, characterized in that the method comprises the following steps: capturing a sound source signal 310 through a microphone cavity 110 and generating a digitized audio signal 320; and processing the digitized audio signal 320 in parallel: A first path: encapsulating the digitized audio signal 320 as I²S data 330 and inputting the I²S data 330 into a fundamental frequency detection algorithm 340, and outputting a result to a touch screen display 104 for real-time display; A second path: encapsulating the digitized audio signal 320 as UAC encapsulation data 350 and transmitting the UAC encapsulation data 350 to a host audio stack 360; receiving a user input instruction through the touch screen display 104 and dynamically adjusting an audio processing parameter of the digital signal processor 102.
[0033] Embodiment one: basic architecture embodiment Please refer to Fig. 1 and Fig. 3 .
[0034] System Composition The system is integrated in a self-contained, compact single housing, containing the following core components: Microphone cavity 110 and microphone assembly 101: The microphone assembly 101 is encapsulated within the microphone cavity 110. The microphone assembly 101 is responsible for picking up external sound source signals 310 (such as musical instruments, human voices) and converting them into analog electrical signals.
[0035] Digital signal processor 102: Directly connected (one-way transmission) to the microphone assembly 101 through the analog signal transmission path 105. The digital signal processor 102 receives the analog electrical signals and performs high-precision analog-to-digital conversion (ADC) to generate digital audio signals 320. The digital signal processor 102 has built-in audio processing algorithms.
[0036] Microcontroller unit 103: Establishes a key connection with the digital signal processor 102 through the digital audio interface 106. The digital audio interface 106 uses the I²S bus protocol to ensure low latency and high fidelity in transmitting uncompressed digital audio signals 320 from the digital signal processor 102 to the microcontroller unit 103. The core task of the microcontroller unit 103 is to execute the real-time fundamental frequency detection algorithm 340.
[0037] Touchscreen display 104: Connected to the microcontroller unit 103 through the display interface 108 (such as SPI, parallel display interface), receives and displays the fundamental frequency detection results. At the same time, the touchscreen display 104 serves as a user input interface, sending user's audio parameter adjustment instructions (such as gain adjustment, EQ curve selection, noise suppression intensity setting, etc.) to the microcontroller unit 103 through the bidirectional control interface 107 (using UART or I²C protocol).
[0038] USB protocol interface 109: Located outside the housing, serving as the main channel for connecting the system to the external host 120.
[0039] External host 120 interaction: The USB physical port 121 located outside the housing is directly connected to the USB protocol interface 109 inside the system. The external host 120 runs the operating system and its built-in audio stack 360 (such as Windows' USB AudioClass driver, macOS' Core Audio).
[0040] Core connection and control Audio data transmission path: Analog path: Microphone 101 to analog signal transmission path 105 to digital signal processor 102 (ADC).
[0041] Parallel digital path: First path (local detection): Digital signal processor 102 to digital audio interface 106 to microcontroller unit 103 (executing fundamental frequency detection algorithm 340).
[0042] Second path (host transmission): Digital signal processor 102 to USB protocol interface 109 to host USB physical port 121 to host audio stack 360 (as a standard USB audio input device).
[0043] User instructions and display: User operates touch screen display 104 to make settings or adjustments.
[0044] Adjustment instructions are sent to microcontroller unit 103 via bidirectional control interface 107 (UART / I²C).
[0045] After microcontroller unit 103 parses the instructions, it forwards the instructions to digital signal processor 102 through the same bidirectional control interface 107 (UART / I²C). Digital signal processor 102 dynamically adjusts its internal audio processing parameters (such as gain, EQ, noise suppression) accordingly.
[0046] Fundamental frequency display: After microcontroller unit 103 completes the fundamental frequency detection algorithm 340, it generates a visual data packet (containing frequency value, corresponding musical note name, and real-time deviation indication from the set target pitch), which is sent to touch screen display 104 through display interface 108 for real-time update and display.
[0047] Power supply and plug-and-play: The power required by the entire system is obtained from external host 120 through USB protocol interface 109 (USB bus power supply). The system fully supports the USB Audio Class specification and can achieve plug-and-play function when connected to external host 120, without the need for additional driver installation (within the scope of operating system support).
[0048] Workflow Acoustic input: Sound source signal 310 is captured by microphone assembly 101 in microphone cavity 110 and converted into an analog electrical signal.
[0049] Signal digitization: Digital signal processor 102 receives the analog electrical signal, performs ADC, and generates digitized audio signal 320.
[0050] Parallel processing: First path (local real-time detection): Digital signal processor 102 encapsulates its internal digitized audio signal 320 into I²S data 330 format, continuously and low-latency streaming to microcontroller unit 103 through digital audio interface 106. Microcontroller unit 103 runs a pitch detection algorithm 340 (such as autocorrelation, YIN algorithm or its variants) to analyze this I²S stream data in real-time, calculating the current audio pitch result (frequency value, note name, tuning deviation). The result is immediately pushed to touch screen display 104 through display interface 108 for real-time visual display (such as numerical value, note bar, deviation indication arrow).
[0051] Second path (host audio transmission): Digital signal processor 102 processes its digital audio signal (such as applying user-set gain, EQ, noise suppression) and encapsulates it into standard UAC (USB Audio Class) format encapsulation data. This data is stably output to the operating system audio stack 360 of external host 120 through USB protocol interface 109. External host 120 can use this audio stream for recording, voice call, network live broadcast, music production software (DAW), etc. just like using any standard USB microphone.
[0052] User interaction and dynamic adjustment: The user views real-time pitch information (such as A4 note, current 440.5 Hz, 0.5 Hz higher) on touch screen display 104.
[0053] The user adjusts the relevant settings through the touch screen as needed (for example, the performer wants to monitor his own pitch more accurately, or the tuner needs to set the reference pitch accurately). For example, the user increases the microphone gain to avoid environmental noise affecting detection, reduces the EQ of a specific frequency band to highlight the pitch, and enhances noise suppression.
[0054] Instruction path: adjustment request of touch screen 104 to bidirectional control interface 107 (UART / I²C) to microcontroller unit 103 to (instruction analysis and forwarding) to bidirectional control interface 107 (UART / I²C) to digital signal processor 102.
[0055] Parameter adjustment: digital signal processor 102 receives adjustment instructions and dynamically adjusts corresponding parameters in its audio processing pipeline in real time. The effect of the adjustment is reflected in the quality of the UAC audio stream transmitted to external host 120 subsequently, and also affects the quality of the subsequent generated I²S data stream 330 (such as improved signal-to-noise ratio), which may improve the accuracy and stability of the pitch detection algorithm 340 at the microcontroller unit 103 end.
[0056] Example two: optimized implementation with integrated USB Hub This embodiment is an extension of Embodiment One. The main improvement is the introduction of an on-chip USB Hub 210, which is located between the Digital Signal Processor 102 / Micro Controller Unit 103 and the final USB protocol interface 109. This design provides more flexibility and internal system power / data isolation capability, especially suitable for systems that need to handle high-bandwidth USB audio stream and frequent control signaling at the same time. Please refer to Figs. 1 to 3 .
[0057] System Composition: USB Hub 210: Core chip or module integrated in the internal system housing. The USB Hub 210 has at least one upstream port and multiple downstream ports.
[0058] Specialized Data Channels: DSP-USB Data Channel 211: Connects the Digital Signal Processor 102 to one of the downstream ports of the USB Hub 210. Used to transmit UAC encapsulated data 350 generated by the Digital Signal Processor 102.
[0059] MCU-USB Data Channel 212: Connects the Micro Controller Unit 103 to another downstream port of the USB Hub 210. Provides a channel for the Micro Controller Unit 103 to transmit control signaling (optional) and potential firmware upgrades, independent of the I²S bus.
[0060] Unified Upstream and Power Supply: The upstream port of the USB Hub 210 is directly connected to the USB protocol interface 109 on the housing. The external host 120 still connects directly to the USB protocol interface 109 of the system through its USB physical port 121.
[0061] Connection and Data Flow Optimization Host Connection: The external host 120 still connects to the system USB protocol interface 109 through the USB physical port 121. At this time, the target physical device for connection is the USB Hub 210.
[0062] DSP Audio Output: UAC encapsulated data 350 generated by the Digital Signal Processor 102 is transmitted to the USB Hub 210 through the specialized hardware-connected DSP-USB data channel 211.
[0063] MCU Access to Network (Optional): Enhanced Control Path: In addition to communicating with the Digital Signal Processor 102 through the original bidirectional control interface 107, the Micro Controller Unit 103 can also directly access the USB network through the MCU-USB data channel 212. Its main uses are: More efficient / versatile control command transmission (alternative or supplementary to bidirectional control interface 107): The microcontroller unit 103 can send user parameter adjustment commands from the touch screen 104 to the USB hub 210 via the MCU-USB data channel 212, and then to the external host 120 via the USB protocol interface 109 (requires host-side software support). At the same time, the external host 120 can also send control commands directly to the microcontroller unit 103 via this path. This implements a second control channel in addition to the bidirectional control interface 107, providing stronger control capabilities and flexibility.
[0064] Firmware / configuration updates: The external host 120 can directly access the microcontroller unit 103 via this path, facilitating device firmware upgrades (FOTA) or bulk configuration parameter settings without disconnecting the main audio stream of the digital signal processor 102.
[0065] Debugging and diagnostics: Provides an additional transmission channel for debugging information.
[0066] Fundamental frequency information upload (optional): The fundamental frequency detection results generated by the microcontroller unit 103 can be transmitted to the external host 120 via the MCU-USB data channel 212 in addition to local display, for use by host-side application software (such as tuning software, music education software, DAW instrument plugins).
[0067] Power management optimization: The USB hub 210 is responsible for intelligently distributing the total power (5V VBUS) obtained from the host USB protocol interface 109 to itself and the devices connected to its downstream ports (i.e. the digital signal processor 102 and the microcontroller unit 103). This provides a more stable and reliable power distribution mechanism. The digital signal processor 102 and the microcontroller unit 103 both take power through the USB hub 210. This centralized distribution helps manage the power consumption needs of different internal components.
[0068] Core functions remain: Acoustic signal pickup.
[0069] Audio digitization and processing (digital signal processor 102).
[0070] Real-time fundamental frequency detection (microcontroller unit 103).
[0071] Local touch screen display of fundamental frequency information and parameter adjustment (touch screen display 104).
[0072] Provide standard UAC audio stream to host.
[0073] The critical low-latency audio data transfer between the microcontroller unit 103 and the digital signal processor 102 is still mainly done through the digital audio interface 106, the real-time performance of the fundamental frequency detection is fully guaranteed.
[0074] The main channel of the audio parameter adjustment instructions can still be transmitted efficiently and with low overhead directly between the digital signal processor 102 and the microcontroller unit 103 through the bidirectional control interface 107 (UART / I2C). The MCU-USB data channel 212 provides an auxiliary or advanced communication option.
[0075] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.
Claims
1. A real-time tone detection microphone system, characterized in that include: A microphone cavity (110) for converting an acoustic signal into an analog electrical signal; Specifically comprising: a microphone component (101) and a digital signal processor (102); The microphone assembly (101) transmits signals unidirectionally to the digital signal processor (102) via the analog signal transmission path (105); A digital signal processor (102) is used to convert an analog electrical signal into a digitized audio signal and output an audio stream in a USB audio class format to an external host (120) via a USB protocol interface (109); A microcontroller unit (103) is connected to the digital signal processor (102) via a digital audio interface (106), and is used to receive the digitized audio signal and execute a real-time fundamental frequency detection algorithm; A touch screen display (104) is connected to the microcontroller unit (103) via a display interface (108) to display baseband data in real time, and sends audio parameter adjustment instructions to the microcontroller unit (103) via a bidirectional control interface (107); wherein the microcontroller unit (103) forwards user instructions to the digital signal processor (102) via a bidirectional control interface (107) to dynamically adjust gain, equalization or noise suppression parameters; All components are integrated into a single housing, forming a standalone device that requires no external processing hardware.
2. A real-time tone detection microphone system according to claim 1, characterized in that: The digital audio interface (106) is an I²S bus protocol, which enables low-latency audio stream transmission between the digital signal processor (102) and the microcontroller unit (103).
3. The real-time tone detection microphone system according to claim 1, wherein: The bidirectional control interface (107) uses a UART or I²C protocol to transmit real-time control instructions of the touch screen display (104) to the digital signal processor (102).
4. The real-time tone detection microphone system according to claim 1, wherein: The touch screen display (104) visualizes fundamental frequency information including frequency value, note name, and real-time tuning deviation indication relative to the target pitch.
5. The real-time tone detection microphone system according to claim 1, wherein: The digital signal processor (102) executes in parallel: transmitting UAC encapsulated data (350) to an external host (120) to support an operating system audio stack (360); The I²S data (330) is transmitted to the microcontroller unit (103) to drive a local tone detection algorithm (340).
6. A real-time tone detection microphone system according to claim 5, characterized in that: The external host (120) is provided with a USB physical port (121) externally, and the USB physical port (121) is directly connected to the USB protocol interface (109), so that the digitized audio stream of the digital signal processor (102) is transmitted to the external host (120).
7. The real-time tone detection microphone system according to claim 1, wherein: The system is powered via a USB protocol interface (109) and supports plug-and-play operation.
8. A real-time tone detection microphone system according to any one of claims 1 to 7, characterized in that: The device further comprises a USB hub (210), which is arranged between the connection between the digital signal processor (102) and the USB protocol interface (109); the USB hub (210) is connected to the digital signal processor (102) via a DSP-USB data channel (211); the USB hub (210) is connected to the microcontroller unit (103) via an MCU-USB data channel (212); and the USB hub (210) is electrically connected to the USB protocol interface (109).
9. A real-time tone detection method for a real-time tone detection microphone system, characterized in that: include: Capturing a sound source signal (310) through a microphone cavity (110) and generating a digitized audio signal (320); and processing the digitized audio signal (320) in parallel: First path: encapsulating the data into I²S data (330) and inputting it into a fundamental frequency detection algorithm (340), and outputting the result to a touch screen display (104) for real-time display; Second path: encapsulating the data into UAC encapsulated data (350) and transmitting it to the host audio stack (360); receiving user input instructions through the touch screen display (104) and dynamically adjusting the audio processing parameters of the digital signal processor (102).