1.1 Hi-Res Audio is enabled by default. Play 96kHz/24-bit audio files for the best sound quality. 1.2 LDAC is disabled by default and is supported on Android only. Open the Haylou Sound App and enable LDAC. Restart the headphones. 1.3 Go to Bluetooth Settings → Headphones → Audio Codec, then select LDAC and choose Prioritize Audio Quality (990kbps/909kbps). Note: Enabling LDAC will automatically disable Low Latency Mode and Dual Device Connection.