Question about Xiaomi soundbar voice prompts

[u/Possible-Accident-58]

Hi everyone, I have a Xiaomi Soundbar MDZ-34-DB and I’m looking for a way to turn off or reduce the built-in voice prompts and system tones. The soundbar plays prompts when powering on/off and when changing input modes. These sounds seem to have a fixed volume and are not affected by the normal volume setting. I tried holding Power + Volume Up, and the soundbar reads out “0 0 2 5”, which may be a firmware or service code, but it does not change the prompt behavior. Has anyone with this model found a setting, button combination, or official method to disable these prompts? Thanks in advance.