System for wireless audio signal transmission

Abstract

System (100) for wireless audio signal transmission, the system (100) comprising a. comprising at least one transmitting unit (110) i. an input module (111) for inputting a sound signal, ii. a transmitter module (112) for wireless transmission of the sound signal according to Bluetooth Low Energy, WLAN and / or ESP-NOW, and iii. a power supply (113) for supplying the transmitting unit (110) with power; and b. comprising a receiving unit (120) i. a receiving module (122) for wirelessly receiving the sound signal transmitted by the transmitting module (112) of the transmitting unit (110), ii. an processing module (124) for real-time processing of the sound signal, iii. an output module (125) for outputting the processed sound signal, iv. an operating interface (126) for wirelessly connecting the receiving unit to an external computer device (130) for operating the receiving unit, and v. a power supply (123) to supply the receiving unit (120) with energy.

Description

Technical field

[0001] The invention relates to a system for wireless audio signal transmission. The invention belongs to the field of music technology and audio processing. State of the art

[0002] Currently, there are three categories of comparable technology:

[0003] The first category consists of classic amplifiers. These are bulky, heavy, and difficult to transport, require a wired connection to the sound source (e.g., a guitar), and offer no or limited digital sound processing.

[0004] The second category consists of digital amplifiers with app control. These are often expensive and not very portable, require additional devices such as audio interfaces, and do not offer a direct real-time connection via an app without an additional interface.

[0005] The third category consists of wireless transmitters. These only transmit the signal without sound processing, often have high latency or poor sound quality, and do not allow integration into existing digital systems.

[0006] In general, the current state of the art has the following disadvantages: Being tethered to cables severely restricts musicians' freedom of movement. Power dependency: Many amplifiers require mains power, which complicates live performances. Limited effects: Analog amplifiers usually require separate effects units. Lack of software integration: Without an additional interface, digital control via an app is not possible.

[0007] Musicians are limited in their mobility (heavy classical amplifiers) and creativity (effect settings) by bulky amplifiers, expensive effects units and cable systems.

[0008] The publications CN 106941643 A, CN 119767209 A, CN 219958524 U and CN 216673271 U describe known systems for wireless audio signal transmission and audio signal processing. Technical task

[0009] The object of the invention is to create a simple, cost-effective and versatile system for wireless audio signal transmission and audio signal processing. Technical solution

[0010] The invention solves the technical problem by means of a system according to claim 1. Advantageous embodiments are the subject of the dependent claims.

[0011] The inventive system for wireless audio signal transmission comprises at least one transmitter unit. The transmitter unit includes an input module for inputting an audio signal (e.g., a guitar sound signal), a transmitter module for wirelessly transmitting the audio signal according to Bluetooth, Bluetooth Low Energy, WLAN, and / or ESP-NOW, and a power supply for powering the transmitter unit. Bluetooth Low Energy preferably conforms to the Bluetooth 4.2 standard. WLAN refers to wireless data transmission in a radio network according to the IEEE 802.11 standard. Bluetooth Low Energy, WLAN, and ESP-NOW all utilize the license-free ISM (Industrial, Scientific, and Medical) radio band at 2.4 GHz.

[0012] ESP-NOW is a communication protocol provided by Espressif Systems that utilizes a physical layer and a data link layer according to IEEE 802.11, reducing the five layers above it in the OSI (Open Systems Interface) model to just one. This eliminates the need to transmit data through the network, transport, session, presentation, and application layers. Furthermore, packet headers and unpackers are not required at each layer, resulting in faster response times and reduced latency caused by packet loss in congested networks. ESP-NOW allows for the creation of encrypted or unencrypted peer-to-peer networks with up to 20 participants. The typical transmission range for ESP-NOW is up to 100 meters indoors and up to 800 meters outdoors.

[0013] The system comprises a receiver unit. The receiver unit includes a receiver module for wirelessly receiving the sound signal transmitted by the transmitter module of the transmitter unit, a processing module for real-time processing of the sound signal, an output module for outputting the processed sound signal, a user interface for wirelessly connecting the receiver unit to an external computer device for operating the receiver unit, and a power supply for providing power to the receiver unit.

[0014] Real-time processing is characterized by the fact that no latency perceptible to a user of the system occurs during the processing. Processing latency is the time that elapses between receiving the audio signal and outputting the processed audio signal.

[0015] The external computer device is characterized by being physically separate from the receiving unit. The external computer device can be part of the system according to the invention. The external computer device is, for example, a mobile computer device, in particular a smartphone, tablet or laptop, or a desktop computer. Beneficial effects

[0016] By means of a transmitter module set up to send the sound signal according to Bluetooth, Bluetooth Low Energy, WLAN and / or ESP-NOW, the sound signal can be transmitted from the transmitter unit to the receiver unit with a particularly low latency, so that no disturbing delays occur during the sound signal transmission.

[0017] Furthermore, multiple transmitter modules set up to send the sound signal according to Bluetooth, Bluetooth Low Energy, WLAN and / or ESP-NOW can communicate with the receiver unit simultaneously, making the system particularly versatile.

[0018] The user interface for wirelessly connecting the receiver to an external computer allows for particularly easy operation of the system (e.g., using a dedicated app on the external computer), and the external computer can advantageously be positioned independently of the receiver. Furthermore, thanks to this user interface, the receiver requires no additional controls and can therefore be designed with a particularly simple and robust construction.

[0019] The invention creates an innovative, wireless sound transmission system for musicians (e.g., guitarists) that combines wireless freedom, real-time sound processing, and app integration. The invention preferably replaces traditional amplifiers, effects units, and cable systems with a single, compact system.

[0020] Wireless audio transmission allows musicians to move freely, for example on stage, without being tethered to cables. The system saves time through intuitive operation and quick setup without cumbersome cabling or additional hardware. It also offers cost savings and high energy and resource efficiency, as additional effects units or amplifiers become unnecessary. The system allows for quick and customized sound shaping for any situation. Furthermore, it offers high flexibility through compatibility with existing amplifiers and the option of using it as a stand-alone solution.

[0021] For professional musicians, the invention offers maximum flexibility for live performances and studio work. For hobbyists and beginners, it provides an affordable and easy-to-use solution. For sound engineers and event companies, it enables mobile and uncomplicated setups for live events. For music schools, it provides cost-effective, professional equipment for students. Embodiments of the invention

[0022] The input module preferably includes a microphone for analog or digital recording of the sound signal. The microphone is, for example, a MEMS microphone (microelectromechanical systems) or an electret condenser microphone with an analog-to-digital converter. The microphone preferably captures sound signal inputs in real time.

[0023] The input module preferably comprises a connector socket and / or a connector plug, preferably a jack socket and / or a jack plug, in particular a 6.35 mm jack socket and / or a 6.35 mm jack plug, for connecting the transmitter unit to a musical instrument for inputting the sound signal from the musical instrument. The sound signal is, for example, an electrical signal generated by a pickup of the musical instrument, in particular by a pickup of an electric or acoustic guitar.

[0024] The input module preferably includes at least one or two analog-to-digital converters for analog-to-digital conversion of the audio signal. The analog-to-digital converter(s) may, for example, each comprise eight or ten channels and / or a resolution of up to 8 bits, 12 bits, 24 bits, or 32 bits. The sampling rate of the analog-to-digital converter(s) may, for example, be from 16 kHz to 96 kHz.

[0025] For analog signals, the signal is routed through the analog-to-digital converter before being sent by the transmitting module. For digital signals (e.g., from an I 2 S-microphones (Inter-Integrated-Circuit-Sound-Microphones) transmit the sound signal data, for example, via an I 2 The S-interface is transferred directly to the transmitter module.

[0026] The power supply of the transmitting unit and / or the power supply of the receiving unit preferably includes a connection element for connecting the power supply to an external power source, preferably a USB port.

[0027] The power supply for the transmitter and / or receiver preferably comprises an energy storage device, preferably a replaceable and / or rechargeable one, more preferably a rechargeable battery, and most preferably a lithium-ion battery. Preferably, the power supply includes energy management that allows charging of the energy storage device during operation of the transmitter and / or receiver and switching between power supply from the energy storage device and power supply from an external power source without interrupting the audio signal.

[0028] The power supply for the transmitting unit and / or the power supply for the receiving unit preferably includes a voltage regulator.

[0029] The power supply for the transmitting unit and / or the power supply for the receiving unit preferably includes a wireless and / or wired charging device for charging the energy storage device.

[0030] The power supply preferably includes protective devices against overload, deep discharge, overcurrent and / or short circuit.

[0031] The power supply preferably comprises a lithium-ion battery and a voltage regulator (e.g., of type AMS1117) and / or a USB 5V power supply. The power supply preferably provides a stable voltage to the transmitter and / or receiver unit and any connected peripherals. The power supply preferably ensures a noise-free power supply to reduce jitter during audio signal processing. The processing module may also include appropriate filter circuits to further reduce jitter.

[0032] The processing module preferably comprises a processor and / or a microcontroller, preferably an STM32 microcontroller, for example an STM32 H7 43 microcontroller. The STM32 H7 series is a group of high-performance STM32 microcontrollers based on the double-precision ARM Cortex-M7F core and an optional second single-precision Cortex-M4F core.

[0033] The microcontroller preferably serves as a central processing unit and / or communication center; processes audio data and / or packet-based transmissions according to WLAN; manages the system's communication with the transmitting unit and / or with the external computer device; supports real-time signal buffering, encoding (e.g., I 2S-Audiostream) and / or transmission via TCP / UDP sockets (Transmission Control Protocol / User Datagram Protocol) and / or WebSockets; and / or offers dual-core processing for multitasking audio processing and network operations.

[0034] The processing module preferably includes an audio codec, e.g., of type ES8388 or MAX98357A. The audio codec preferably converts analog audio inputs and / or audio outputs into digital signals. 2 S-streams are used to ensure compatibility with the microcontroller. The audio codec preferably provides a digital-to-analog converter for output and / or an analog-to-digital converter for input. The audio codec preferably improves the sound signal quality and supports stereo output configurations.

[0035] Depending on the method used, the microcontroller can achieve very low latency in processing the audio signal. The latency depends primarily on how the analog-to-digital-to-analog conversion of the audio signal is performed. If the conversion is done via polling, the latency is at its maximum, meaning including processor delays and without direct memory access, typically around 5 ms to 10 ms. If the conversion is done via interrupt control, an improved latency of typically around 1 ms to 5 ms is achieved, but this is limited by the software speed of the interrupt routine (ISR). With analog-to-digital conversion with direct memory access and digital-to-analog conversion via I 2 With S (Inter-IC Sound), the lowest latency of approximately 0.3 ms to 1.0 ms can be achieved. This applies to analog-to-digital and digital-to-analog conversion via I. 2 S can be performed depending on the buffer size and the I 2The S-clock can achieve a latency of less than 5 ms.

[0036] The processing module preferably comprises a data storage device, preferably a replaceable one, preferably a flash memory and / or an SD card (Secure Digital Memory Card). The data storage device preferably provides local storage for an audio signal buffer, recordings, and / or configuration files, which is useful for offline applications and / or for the error-free operation of the receiving unit.

[0037] The processing module is preferably configured to process the audio signal with a latency of less than 20 ms, preferably less than 10 ms, particularly preferably less than 5 ms, and most preferably less than 1 ms. This enables real-time processing of the audio signal.

[0038] The processing module is preferably set up to apply a sound effect and / or amplifier simulation to the sound signal.

[0039] Preferably, the processing module is configured for the real-time conversion of analog or digital audio signals into MIDI data. The MIDI data generated in this way can be transmitted to external devices or software via a suitable interface (e.g., USB-MIDI or Bluetooth-MIDI). This enables, for example, the direct control of software instruments (VSTs) or synthesizers from a played instrument.

[0040] The processing module can preferably process incoming and outgoing audio signals simultaneously (e.g., pass-through monitoring with simultaneous application of DSP (Digital Signal Processing) effects). For this purpose, the processing module preferably includes dedicated chips for these tasks.

[0041] For example, for outputting the processed audio signal via an analog output interface, the output module preferably comprises at least one or two digital-to-analog converters, each having, for example, a resolution of 8 bits, 12 bits, 24 bits or 32 bits and / or a variable sampling rate, for example in the range of 8 kHz to 384 kHz, wherein the sampling rate depends in particular on a data rate of the data provided by the processing module.

[0042] The output module preferably includes an amplifier for amplifying the processed audio signal.

[0043] The output module preferably comprises an AUX interface, a USB interface (preferably a USB-C interface), an XLR interface (preferably a mini-XLR interface), a MIDI interface (Musical Instrument Digital Interface), and / or a WLAN interface (Wireless Local Area Network), preferably for transmission via TCP, UDP, and / or WebSocket. The interfaces can be configured to simultaneously output different audio signals or the same audio signal, particularly as a stereo signal. Preferably, the output module includes several of the aforementioned interfaces for outputting the processed audio signal, allowing the system to be used with a variety of loudspeakers.

[0044] The output module includes, for example, a headphone jack, particularly with an integrated amplifier. The output module can be configured to separately output the processed audio signals from multiple transmitters.

[0045] The user interface preferably includes a Bluetooth interface, in particular Bluetooth Low Energy, and / or a WLAN interface. This allows common external computer devices, especially smartphones, to be easily connected to the user interface.

[0046] The system preferably comprises a plurality of transmitting units, wherein the receiving module of the receiving unit is configured to be connected to the transmitting modules of the transmitting units for the simultaneous reception of the sound signals transmitted by the transmitting modules, wherein the processing module is configured for the simultaneous processing of the sound signals, and / or wherein the output module is configured for the simultaneous output of the processed sound signals. This allows the system to be used with multiple sound sources simultaneously in a particularly versatile manner.

[0047] If the transmitter modules are set up to send the sound signals according to Bluetooth, Bluetooth Low Energy, the sound signals of several transmitter modules can be separated from each other during simultaneous reception using the access addresses of the transmitter modules and / or by means of frequency hopping.

[0048] If the transmitter modules are configured to send the sound signals according to WLAN, the sound signals of several transmitter modules can be separated from each other during simultaneous reception, for example, by means of the MAC addresses of the transmitter modules at the data link layer, by means of the IP addresses of the transmitter modules at the network layer or the transport layer and / or by separating the TCP / UDP ports.

[0049] If the transmitter modules are configured to send the sound signals according to ESP-NOW, the sound signals of several transmitter modules, e.g., up to 20 transmitter modules, can be separated from each other during simultaneous reception, especially in the same WLAN channel, using the MAC addresses of the transmitter modules and / or using their own message types.

[0050] Preferably, the system is configured so that multiple transmitter modules can be controlled and monitored simultaneously via a single external computer device. The system can preferably be configured to automatically identify connected transmitters and / or allow separate configuration, control, and / or real-time monitoring of each individual transmitter. This allows setups with multiple instruments and / or personnel within a network.

[0051] The transmitter module of the transmitting unit and the receiver module of the receiving unit are preferably configured for wireless transmission of the audio signal with a latency of less than 30 ms, preferably less than 10 ms, and most preferably less than 5 ms. This ensures real-time audio transmission without disruptive delays. To minimize latency, for example, small buffers and synchronous I are used. 2S-clocking and / or a direct packet path is used.

[0052] WLAN typically allows audio signals to be transmitted with a latency of approximately 2 ms to 10 ms. Bluetooth Low Energy typically allows audio signals to be transmitted with a latency of approximately 5 ms to 30 ms. ESP-NOW typically allows a latency of approximately 1 ms to 5 ms.

[0053] The receiving unit preferably includes an integrated and / or external WLAN antenna. The WLAN antenna preferably improves the signal strength for reliable WLAN transmission. The WLAN antenna preferably enables the streaming of audio signals over wireless local or peer-to-peer networks.

[0054] The transmitter module of the transmitting unit and / or the receiver module of the receiving unit preferably comprises a processor and / or a microcontroller, preferably an ESP32 microcontroller, e.g., the ESP32-S3 model from Espressif Systems. The ESP32 is a family of cost-effective, energy-efficient microcontrollers that integrate both Wi-Fi and Bluetooth functionality. ESP32 microcontrollers are therefore particularly well-suited for creating a cost-effective system for low-latency audio signal transmission with low power consumption and thus long battery life.

[0055] The system preferably includes a database for storing sound effects and / or sound profiles, wherein the external computer device is configured to create the sound effects and / or sound profiles, retrieve them from the database, edit them, transfer them to the processing module for application to the sound signal and / or store them in the database.

[0056] Musicians can preferably create, save, and adjust individual sound profiles live via an app on an external computer device. This makes music production more mobile, creative, and flexible. The invention preferably combines, for the first time, wireless signal transmission with real-time sound processing and app integration. A specially developed app preferably enables the easy creation and management of sound profiles. The app is preferably configured to generate suitable presets for creating and / or adjusting the sound profiles from text input and / or the sound signal, particularly with the aid of artificial intelligence.

[0057] The database is preferably stored in a data storage device of the receiving unit, in a data storage device of the external computer device and / or in a cloud data storage device.

[0058] The system is preferably designed to be expanded through software updates, thereby increasing its durability and sustainability. Preferably, the firmware of the transmitter and / or receiver unit can be updated, for example, via a USB port on the transmitter and / or receiver unit and / or wirelessly, particularly via an app on an external computer device.

[0059] The receiver preferably includes a mechanical on / off switch for turning the receiver on and off to minimize energy consumption when not in use. The receiver preferably includes a volume control, particularly in the form of a rotary control, to adjust the volume of the audio signal output by the receiver's output module. The receiver preferably includes a number of, for example, three, foot switch terminals for connecting foot switches to control the receiver. Furthermore, one or more foot switches can also be wirelessly connected to the receiver, for example, by registering the foot switches and the receiver in a shared WLAN mesh network.

[0060] The transmitting unit and / or receiving unit preferably includes a number of status lights, in particular status LEDs, to indicate an operating status of the transmitting unit and / or the receiving unit and / or a charge status of an energy storage device of the transmitting unit and / or the receiving unit.

[0061] The transmitter unit preferably includes a control button for controlling the transmitter unit.

[0062] The system according to the invention can be used to carry out a method for wireless audio signal transmission, in particular a computer-implemented method. The system can be configured to carry out the method. The method can be implemented in a computer program, in particular in an app on the external computer device, wherein the computer program is configured to cause the system to carry out the method.

[0063] The method involves inputting an audio signal to the input module of at least one transmitting unit, for example via a connection socket of the input module attached to a musical instrument. The audio signal is digitized and formatted by the input module, for example, using an analog-to-digital converter, before the input module processes the audio signal, for example, according to Protocol I. 2 S is passed on to the transmitter module. The transmitter module typically acts as the clock for the entire I. 2 S-Bus, but depending on the use case and peripheral configuration, it can also be configured as a clock slave.

[0064] The method involves wirelessly transmitting the sound signal via Bluetooth, Bluetooth Low Energy, WLAN, and / or ESP-NOW from the transmitting module of the transmitter unit to the receiving module of the receiver unit. The receiving module outputs the sound signal, for example, according to Protocol I. 2S forwards to the processing module of the receiving unit.

[0065] The method comprises processing the audio signal using the processing module of the receiving unit. This processing includes, for example, encoding and / or buffering the audio signal and / or applying a sound effect to the audio signal, preferably in real time. The processing module outputs the processed audio signal, for example, according to Protocol I. 2 S is passed to the output module of the receiving unit.

[0066] The method includes outputting the processed audio signal using the output module of the receiving unit. This output includes, for example, converting the audio signal from a digital audio signal to an analog audio signal using a digital-to-analog converter in the output module and / or amplifying the audio signal using an amplifier, in particular a headphone amplifier, in the output module.

[0067] Output includes, for example, transmitting the audio signal via WLAN using TCP, UDP, or WebSocket to a receiving device connected to the receiving unit or to a server. The receiving device can then decode and play back the audio signal.

[0068] Input and transmission are preferably carried out simultaneously by several transmitting units, with the processing and output of the sound signals recorded and transmitted by the several transmitting units preferably being carried out simultaneously by the receiving unit.

[0069] The wireless transmission of the sound signal preferably takes place with a latency of less than 30 ms, preferably less than 10 ms, and particularly preferably less than 5 ms.

[0070] The processing of the sound signal preferably includes analog-to-digital conversion, digital-to-analog conversion and / or amplification of the sound signal and / or application of a sound effect to the sound signal.

[0071] The processing is preferably carried out in real time and / or with a latency of less than 30 ms, preferably less than 10 ms, particularly preferably less than 5 ms, and most preferably less than 1 ms.

[0072] The method preferably comprises operating the receiving unit via the receiving unit's user interface, preferably with a mobile computer device, and particularly preferably with a smartphone app.

[0073] The operation preferably includes creating the sound effect and / or a sound profile, selecting the sound effect and / or the sound profile from a database, editing the sound effect and / or the sound profile and / or saving the sound effect and / or the sound profile in the database.

[0074] The operation preferably includes performing an amplifier simulation.

[0075] The procedure may include one or more of the following security features and protocols: a. WPA2 WLAN encryption by the processing module; b. TLS encryption for secure socket transmission; c. MDNS / Bonjour (Multicast Domain Name System) for device discovery on the network.

[0076] Preferably, the method includes a cloud synchronization function that allows individually created sound profiles to be stored, managed, and accessed from various end devices on a cloud server. This increases user mobility and data security, especially when switching devices or when used by multiple people.

[0077] Preferably, the system and / or method enables the sharing of sound profiles, effect settings, or configurations via an integrated community function. Users can rate, comment on, or further develop preset sound profiles. This function promotes creative exchange among musicians and allows for collaborative use of the system.

[0078] Preferably, the user interface of the receiving unit, or the associated method, is configured for integrating external software modules. For this purpose, the method includes a defined application programming interface (API) through which third-party providers can supply additional effects, sound modules, or functions. The interface enables, for example, the integration of plug-ins in VST or AU format, or proprietary extensions that can be loaded via a cloud module. This allows the system to be expanded modularly and customized, giving both professional and semi-professional users access to an increasing range of functions. The third-party modules can be executed locally or on a server and controlled in real time via the method. Due to its open architecture, the invention can be used as a platform for collaborative and expandable sound design.

[0079] Preferably, the system is configured to wirelessly connect multiple receiving units, particularly via a peer-to-peer network, such as a WLAN-based mesh network. In such a configuration, several devices can be operated synchronously, for example, in band or ensemble setups. One receiving unit can act as the host and exchange timing and effect parameters with other units. The mesh network enables low-latency distribution of audio or control signals between multiple receiving modules without the need for a central router. This makes the system particularly suitable for live applications, mobile recording setups, or music schools where multiple users work simultaneously with wireless instruments. The method preferably allows for the centralized control of all connected devices from a higher-level control device. Brief description of the drawings Fig. Figure 1 schematically shows a configuration of the system. Fig. Figure 2 shows possible steps of an exemplary design of a procedure that can be executed with the system. Fig. 1

[0080] Fig. Figure 1 schematically shows an embodiment of the system 100 for wireless audio signal transmission. The system 100 shown comprises at least one transmitter 110, for example, two transmitters 110. Each transmitter 110 comprises an input module 111, for example, a microphone, for inputting an audio signal, a transmitter module 112 for wireless transmission of the audio signal according to Bluetooth, Bluetooth Low Energy, WLAN and / or ESP-NOW, and a power supply 113, for example, a battery, for supplying the transmitter 110 with energy.

[0081] The system 100 shown comprises a receiver unit 120, which in turn includes a receiver module 122 for wirelessly receiving the sound signal transmitted by the transmitter modules 112 of the transmitter units 110. The transmission of the sound signal from the transmitter modules 112 to the receiver module 122 is symbolized by dashed lines.

[0082] The receiver unit 120 shown includes a processing module 124, for example with an STM32 microcontroller, for real-time processing of the sound signal.

[0083] The receiver unit 120 shown includes an output module 125, for example with an XLR interface, for outputting the processed audio signal, for example to an output device 140 connected to the output module 125, such as a loudspeaker. The connection between the output module 125 and the output device 140 is shown by a dashed line.

[0084] The receiver unit 120 shown includes an operating interface 126, for example a Bluetooth interface, for wireless connection (shown by dashed line) of the receiver unit with an external computer device 130, for example a smartphone, for operating the receiver unit, for example via an app.

[0085] The receiver unit 120 shown includes a power supply 123, for example a battery, to supply the receiver unit 120 with energy.

[0086] System 100 includes, for example, a database 131 for storing sound effects and / or sound profiles, whereby the database 131 may in particular be stored in a data storage device of the external computer device 130. Fig. 2

[0087] Fig. Figure 2 shows possible steps of an exemplary design of a procedure 200 that can be executed with the system 100.

[0088] The procedure 200 comprises an input 210 of a sound signal with the input module 111 of the at least one transmitting unit 110 of the system 100.

[0089] Optionally, the procedure 200 includes applying 211 an audio codec to the sound signal.

[0090] The procedure 200 can include a determination 220 by the input module 111 as to whether the sound signal is analog or digital. If the sound signal is analog, the determination 220 is followed by a conversion 221 of the analog sound signal into a digital sound signal, for example with an analog-to-digital converter of the input module 111.

[0091] The detection 220 and, if necessary, conversion 221 is followed by a wireless transmission 212 of the sound signal from the transmitter module 112 of the transmitter unit 110 to the receiver module 122 of the receiver unit 120 of the system 120.

[0092] Method 200 comprises processing 230 of the sound signal using the processing module 124 of the receiving unit 120, wherein the processing 230 includes, for example, buffering and encoding the sound signal and / or applying a sound effect to the sound signal. The processing is controlled, for example, by an external computer device 130, such as a smartphone via an app.

[0093] Optionally, the procedure 200 includes storing 231 the processed sound signal and / or sound effect in a database 131, which is stored, for example, in a data storage device of the external computer device 130.

[0094] The method 200 shown includes selecting 240 an output method for outputting the processed sound signal via the output module 125 of the receiving unit 120.

[0095] Depending on the selected output method, the processed audio signal can be output via WLAN according to TCP / UDP 241 or according to WebSocket 242 to an output device 140, for example, a loudspeaker. In addition, or alternatively, the audio signal can be output via other output interfaces of the output module 125, for example, via a headphone jack and / or an AUX interface.

[0096] The output device 140 can perform a playback 250 of the processed sound signal, whereby the playback 250 can include a decoding of the sound signal. Reference symbol list 110 System 111 Input module 112 Transmitter module 113 Power supply of the transmitter unit 120 receiver units 122 Receiver module 123 Power supply of the receiving unit 124 Processing module 125 Output module 126 User interface 130 computer equipment 200 procedures Enter 210 211 Apply 220 findings 221 Convert 230 Edit 231 Save 240 Select 241 Output according to TCP / UDP 242 Output according to WebSocket 250 Playback 131 database 140 output device QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 106941643 A

[0008] CN 119767209 A

[0008] CN 219958524

[0008] CN 216673271 U

[0008]

Claims

[1] System (100) for wireless audio signal transmission, the system (100) comprising a. comprising at least one transmitting unit (110) i. an input module (111) for inputting a sound signal, ii. a transmitter module (112) for wireless transmission of the sound signal according to Bluetooth Low Energy, WLAN and / or ESP-NOW, and iii. a power supply (113) for supplying the transmitting unit (110) with power; and b. comprising a receiving unit (120) i. a receiving module (122) for wirelessly receiving the sound signal transmitted by the transmitting module (112) of the transmitting unit (110), ii. an processing module (124) for real-time processing of the sound signal, iii. an output module (125) for outputting the processed sound signal, iv. an operating interface (126) for wirelessly connecting the receiving unit to an external computer device (130) for operating the receiving unit, and v. a power supply (123) to supply the receiving unit (120) with energy. [2] System (100) according to claim 1, wherein the input module (111) a. includes a microphone for analog and / or digital recording of the sound signal; b. comprising a connection socket and / or a connection plug, preferably a jack socket and / or a jack plug, for connecting the transmitter unit (110) to a musical instrument for inputting the sound signal from the musical instrument; c. includes an analog-to-digital converter for analog-to-digital conversion of the audio signal. [3] System (100) according to claim 1 or 2, wherein the power supply (113) of the transmitting unit (110) and / or the power supply (123) of the receiving unit (120) a. comprising a connection element for connecting the power supply to an external power source, preferably a USB port; b. comprising an energy storage device, preferably replaceable and / or rechargeable, preferably a battery, particularly preferably a lithium-ion battery; c. includes a voltage regulator; and / or d. includes a wireless and / or wired charging device for charging the energy storage device. [4] System (100) according to one of claims 1 to 3, wherein the processing module (124) a. comprising a processor, a microcontroller, preferably an STM32 microcontroller; b. a data storage device, preferably removable, preferably a flash memory and / or an SD card (Secure Digital Memory Card); c. is equipped for processing the audio signal with a latency of less than 30 ms, preferably less than 10 ms, particularly preferably less than 5 ms; and / or d. and / or is set up to apply a sound effect and / or amplifier simulation to the sound signal. [5] System (100) according to any one of claims 1 to 4, wherein the output module (125) a. includes a digital-to-analog converter for digital-to-analog conversion of the processed audio signal; and / or b. includes an amplifier to amplify the processed sound signal; c. includes an AUX interface, a USB interface, an XLR interface, a MIDI interface (Musical Instrument Digital Interface), a WLAN interface (Wireless Local Area Network) and / or a headphone jack. [6] System (100) according to any one of claims 1 to 5, wherein the operating interface (126) comprises a Bluetooth interface and / or a WLAN interface. [7] System (100) according to any one of claims 1 to 6, a. wherein the system (100) comprises a plurality of transmitting units (110), b. wherein the receiving module (122) of the receiving unit (120) is configured to be connected to the transmitting modules (111) of the transmitting units (110) for the simultaneous reception of the sound signals transmitted by the transmitting modules (110), c. wherein the processing module (124) is set up for the simultaneous processing of the sound signals; and d. wherein the output module (125) is set up for the simultaneous output of the processed sound signals. [8] System (100) according to any one of claims 1 to 7, wherein the transmitting module (111) of the transmitting unit (110) and the receiving module (122) of the receiving unit (120) a. are equipped for wireless transmission of the audio signal with a latency of less than 30 ms, preferably less than 10 ms, particularly preferably less than 5 ms; and / or b. each includes a processor and / or a microcontroller, preferably an ESP32 microcontroller. [9] System (100) according to any one of claims 1 to 8, a. wherein the system (100) comprises a database (131) for storing sound effects and / or sound profiles b. wherein the external computer device (130) is configured to create the sound effects and / or sound profiles, retrieve them from the database, edit them, transfer them to the processing module (124) for application to the sound signal and / or store them in the database. [10] System (100) according to claim 9, wherein the database (131) is stored in a data storage of the receiving unit (120), in a data storage of the external computer device (130) and / or in a cloud data storage.

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