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Interested in collaborating with Silicon Signals on your next big idea? Please contact us and let us know how we can help you.
The system required sub-15ms end-to-end latency (mic input to output) to ensure real-time performance and lip-sync accuracy. Achieving this with standard BLE Audio posed challenges due to codec and transmission delays.
Maintaining stable audio transmission with minimal dropouts was critical, especially while reducing retransmissions and buffering to optimize latency within BLE Isochronous Channels.
The device needed to deliver 8+ hours of battery life while sustaining high-performance audio processing, requiring careful balancing between low-latency operation and power consumption.
Developing a real-time wireless audio system requires overcoming critical challenges around latency, reliability, and power efficiency. Achieving sub-15ms performance using standard BLE Audio while maintaining stable transmission and long battery life pushed system-level limits.
Achieving sub-15ms end-to-end latency was challenging due to LC3 codec delay and BLE Isochronous Channel constraints.
Reducing retransmissions and buffering for latency optimization risked packet loss and audio dropouts in real-world conditions.
Ensuring deterministic scheduling across codec, BLE stack, and audio drivers required tight control over RTOS timing and buffering.
Maintaining 8+ hours battery life while running low-latency processing limited power-saving opportunities.
Silicon Signals engineered a low-latency, production-ready wireless audio system using BLE Audio on Nordic nRF5340, optimizing performance across codec, RTOS, and audio pipeline layers.
Tuned Isochronous Channels (CIS), reduced transport latency, optimized SDU interval, 2M PHY, and minimal retransmissions.
Configured LC3 codec at 7.5ms frame duration, reducing algorithmic delay while maintaining audio quality.
Prioritized audio, BLE, and driver threads with preemptive scheduling; minimized blocking and jitter.
Reduced buffering across ADC → codec → BLE → DAC path; aligned buffers with codec frame timing.
Configured I2S/PDM with DMA-based double buffering for low-latency, continuous audio data flow.
Optimized power states to maintain performance during streaming while achieving 8+ hours battery life.
Silicon Signals delivers engineering excellence by solving complex low-latency system challenges for real-world deployment.
Let’s engineer your next real-time audio system.
Optimized for Low Latency. Designed for Production.
Nordic nRF5340 SoC, audio front-end (PDM/I2S microphones), wireless receiver module.
Zephyr RTOS with Bluetooth LE Audio stack.
C, Embedded C, Zephyr-based application development.
Segger RTT, Bluetooth LE Sniffer, Zephyr timing utilities, audio latency measurement tools
The solution delivered measurable improvements in real-time audio performance, wireless stability, and power efficiency for production-ready deployment.
Achieved 9–13ms end-to-end latency, consistently meeting real-time audio requirements.
Delivered 8+ hours battery life while maintaining low-latency processing.
Stable wireless audio transmission with minimal dropouts under optimized BLE conditions.
Consistent performance across real-world conditions with optimized pipeline and RTOS tuning.
If you're looking to develop a real-time, production-ready wireless audio solution, this case study shows what’s possible with the right system-level engineering approach.
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