The widespread adoption of speaker devices provides users with excellent audio experiences. The Realtek smart speaker supports multiple audio input modes, including wireless connections like Bluetooth and wired connections like USB, Line-in, SPDIF, and I2S. This device not only supports local audio playback but can also share music in real-time with other devices, achieving seamless music sharing. Its design balances convenience and flexibility, making it suitable for various occasions and providing users with an efficient and enjoyable audio experience.
System Structure
The Realtek smart speaker uses a single Bluetooth SoC as the primary speaker and supports multiple audio input methods including Bluetooth, Line-in, USB, and SPDIF. While playing audio locally, the primary speaker can also synchronize and transmit audio to multiple secondary speakers, achieving coordinated audio coverage. Users can easily control the entire system via the primary speaker or any secondary speaker, including functions such as play/pause, volume adjustment, and track switching, making operation simple and efficient.
Application Scenario
Advantages of Solution
A single chip is not only capable of receiving various inputs for local playback, but can also transmit audio to other speakers for listening.
The roles of the speakers are not fixed, the primary and secondary speakers can be switched freely.
Supports multiple audio input interfaces such as USB, Line-in, SPDIF, I2S, and MIC.
The synchronization playback precision between the primary speaker and all secondary speakers can reach within 50 microseconds.
The system supports Party Mode (one-to-many) and TWS Mode (one-to-one), allowing users to switch between different modes to meet diverse usage needs.
Provides a fully functional SDK development package, including a complete product prototype project, mobile app SDK, OTA tools, and production tools, to reduce customer development efforts and accelerate project implementation.
Recommended Hardware
| RTL8763EFL | RTL8763EWS/ RTL8763EWM | RTL8773DFL | RTL8763GWS | |
|---|---|---|---|---|
| MCU | CM33 like | CM33 like | CM4F | CM55 |
| DSP | HiFi Mini | HiFi Mini | HiFi Mini + HiFi 4 | HiFi Mini |
| MCM Flash Size | 4MB | 4MB | 8MB | 4MB |
| SRAM | 532KB shared | 532KB shared | 4MB shared | 928KB |
| Max MCU Clock | 100MHz | 100MHz | 160MHz | 200MHz |
| Max DSP Clock | 200MHz | 200MHz | 320MHz | 260MHz |
| Protocol | Legacy/BLE/LEA | Legacy/BLE/LEA | Legacy/BLE/LEA | Legacy/BLE/LEA |
| LC3 | Y | Y | Y | Y |
| LC3+ | N | N | Y | N |
| Max GPIO number | 9 | 38 | >50 | 42 |
| USB | N | Y | Y | Y |
| I2S | Y | Y | Y | Y |
| SPDIF | N | N | Y | N |
| Line in | Y | Y | Y | Y |
| MIC Resource | 2A + 4D | 2A + 4D | 4A + 6D | 2A + 4D |
| Package (mm) | QFN40, 4x6 | QFN76, 7x7 | BGA184, 4.6x6 | QFN68, 7x7 |