1. Please make sure the TV sound output is correct:
Settings-Sound-Digital Audio Output -Auto/Pass Through
2. It is recommended to use MUSIC mode; Control the volume within 27;
3. Change to another sound source
4. Try and compare other connection methods: HDMI eARC>Optical>Bluetooth;
If this issue persists, please contact Ultimea customer support at email@example.com for further assistance. Please make sure to mention that you have tried the steps in the FAQ so that our agents do not ask you to repeat these steps.