The Xiaomi 15 Ultra supports a wide range of Bluetooth HD audio protocols, ensuring exceptional sound quality and compatibility with various audio devices. These protocols include SBC, AAC, AptX, AptX HD, AptX Adaptive, LDAC, LHDC (1.0, 2.0, 3.0, 4.0, 5.0), ASHA, Auracast and LC3. These protocols offer high-definition audio streaming, low-latency performance, and enhanced sound clarity for a superior audio experience. However, it does not support the MIHC Bluetooth HD Audio Protocol. This extensive support allows you to enjoy versatile audio connectivity with Bluetooth-enabled devices, such as wireless headphones, speakers, and more.