Dual mode Bluetooth microcontroller is capable of implementing an audio transmitter that supports multiple audio input interfaces such as USB, SDIO, MIC, Line-in, SPDIF, and SPI/I2S. This capability allows the device to connect seamlessly with external audio sources including TVs, computers, and stereo systems. After receiving the audio signal, the transmitter delivers the sound to compatible Bluetooth headsets, speakers, and other receiving devices. In wireless audio transmission, this device serves various functions: As an A2DP source device, it supports wireless transmission of high-quality stereo audio to Bluetooth headphones. As an HFP Audio Gateway (AG), it enables voice communication with Bluetooth headphones via SCO/eSCO links. Additionally, the device supports the LE Audio standard, including Broadcast Audio Stream (BIS) and Connectionless Audio Stream (CIS), allowing efficient transmission of audio data from multiple sources to Bluetooth headphones and delivering a stable and high-quality wireless audio experience. The rich set of interfaces and support for multiple Bluetooth roles ensure the system's flexibility and compatibility, meeting the needs of a wide range of audio application scenarios.

Dual mode Bluetooth microcontroller can be used to implement an audio receiver  solution. It is not only capable of receiving signals from an audio transmitter, but also supports various audio input/output interfaces such as MIC, speaker, and SPI/I2S. This audio receiver serves multiple roles in wireless audio transmission. As an A2DP receiver, it can receive and play high-quality stereo audio transmitted from a mobile phone; as an HFP hands-free device (HF), it enables voice communication via the SCO/eSCO link. Additionally, the device supports the LE Audio standard, efficiently receiving both BIS and CIS audio, thereby providing a stable and high-quality wireless audio experience.

Dual mode Bluetooth microcontroller can be utilized to build an audio transceiver solution that adopts a dual-chip architecture. In this design, two RTL87x3 chips serve as the audio transmitter and audio receiver, respectively, with bidirectional data communication achieved via SPI or I2S interfaces. It features a dual-chip architecture, with two RTL87x3 chips operating respectively as the audio transmitter and the audio receiver, enabling bidirectional data communication via SPI or I2S interfaces. In addition, the solution facilitates seamless collaboration with external processors through the UART interface, supporting stable wireless audio data transmission between multiple devices. This design enhances system scalability and allows for flexible integration with a variety of external processors to meet a broad range of application requirements.

Dual mode Bluetooth microcontroller can be used to build an audio transceiver solutions. Compared to the dual-chip architecture, it utilizes a single-chip architecture that integrates both an audio transmitter and a receiver. The advantage of this solution lies in its careful optimization of system parameters, achieving a good balance between cost, bandwidth, and functionality, while integrating both transmission and reception functions, thereby reducing overall costs and simplifying the development process.