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September 13, 2023
52Audio breaks down how Telink’s TLSR9517B and TLSR9517C multi-protocol SoCs help one wireless lavalier microphone achieve unparalleled sound quality.
The increasing popularity of live-streaming and short videos has driven the continuous development of the social media industry. Social media users are experimenting with various audio peripheral devices to further improve the look of their videos and provide a better audio-visual experience for their audience. Among these devices, wireless lavalier microphones are popular because they can effectively enhance the pickup sound quality. A high-quality wireless lavalier microphone should have high fidelity (Hi-Fi), low latency, and high anti-interference, among other attributes.
Recently, 52Audio disassembled the SmallRig Wave W1-C wireless lavalier microphone and found that the receiver and transmitter are equipped with the Telink Semiconductor TLSR9517B and TLSR9517C multi-protocol wireless audio SoCs, respectively. This series of SoCs integrates powerful 32-bit RISC-V MCU, embedded Flash, stereo audio codec, AUX ADC, and other peripheral modules. It also supports Bluetooth® 5.2, Basic Data Rate (BR), Enhanced Data Rate (EDR), LE, Bluetooth® LE Mesh, and proprietary protocols. As such, all the features required for high-quality wireless audio devices are integrated into a single SoC.
The SmallRig Wave W1-C wireless lavalier microphone is both compact and lightweight. With the transmitter weighing about 14g and the receiver weighing 9g, the device is easy to carry and use at any time. The microphone also adopts a multi-form design — the receiver supports two-way 90° bending and rotation, allowing it to work in flexible recording scenarios.
The SmallRig Wave W1-C uses 2.4G wireless audio transmission technology to limit sound delay within 10ms and achieve audio and video synchronization. The microphone can also transmit up to 100 meters, making it suitable for long-distance recording. It has a single battery life of five hours but can be used up to 30 hours when paired with its charger. In addition, it supports three types of noise reduction and can adapt to different noise levels in various environments. The microphone connection method is also simple and fast — just plug a mobile phone, camera, or other device into the USB-C interface.
The internal motherboard of the SmallRing Wave W1-C receiver is equipped with Telink’s TLSR9517B multi-protocol wireless audio SoC, crystal oscillator, and voltage regulator IC.
The image above shows Telink’s TLSR9517B multi-protocol wireless audio SoC. This series of SoCs supports wireless communication technologies, including Bluetooth 5.2, Basic Data Rate (BR), Enhanced Data Rate (EDR), LE, Bluetooth LE Mesh, and proprietary protocols, thus integrating the requirements for high-quality wireless audio devices into a single SoC.
The TLSR9517 series combines 32-bit RISC-V MCU, embedded Flash, stereo audio codec, AUX ADC, analog and digital microphone inputs, PWM, flexible IO interfaces, and other peripheral modules required for advanced audio applications. It also includes a multi-level power management design to support ultra-low power operation.
Detailed diagram of Telink Semiconductor’s TLSR9517 SoC.
The transmitter holds Telink’s TLSR9517C multi-protocol wireless SoC, a built-in MEMS microphone for 360° omnidirectional sound pickup, a headphone amplifier for 3.5mm interface output audio, and a built-in 130mAh lithium battery. It’s also equipped with a lithium battery charging IC.
The image above shows Telink’s TLSR9517C multi-protocol wireless SoC, which belongs to the same series as the TLSR9517B installed inside the receiver. Combining the two ensures ultra-low latency, Hi-Fi, and high anti-interference in wireless transmission.
In disassembling the SmallRig Wave W1-C wireless lavalier microphone, 52Audio found that its receiver and transmitter use Telink’s TLSR9517B and TLSR9517C multi-protocol wireless audio SoCs, respectively. Both chips are part of the TLSR9517 series and support various wireless communication technologies, including Bluetooth 5.2, Basic Data Rate (BR), Enhanced Data Rate (EDR), LE, Bluetooth LE Mesh, and proprietary protocols. They integrate the requirements for high-quality wireless audio devices into a single SoC and support ultra-low power operation. Combining the two SoCs gives microphones the advantages of ultra-low latency, Hi-Fi, and high anti-interference, thus enhancing product competitiveness.
The company has successfully developed a series of wireless IoT system-level chips with world-class performance levels. Their products widely support various consumer and commercial IoT applications, including smart retail, consumer electronics, lighting, home, healthcare, warehousing logistics, audio entertainment, and more, and are widely used in mainstream brands worldwide.
Note: This article was originally published on 52Audio. Visit Telink’s wiki to learn more about our development tools, or ask us a question through our Technical Forum or by contacting us directly today.