What to do if the sound of the Xiaomi TV A Pro 32 changes dramatically?

If the sound on the Xiaomi TV A Pro 32 changes dramatically, please refer to the following scenarios and their troubleshooting methods:
Scenario 1:
If the issue occurs while you are using the built-in speaker of your TV, please refer to the following steps:   
1. Check if audio settings are correctly configured by going to [Settings] >> [Display & Sound] >> [Sound] >> [Sound Mode];

2. Try playing different types of content such as movies, TV shows, and music to see if the issue is consistent across all sources, which can help determine if the issue is content-specific;
3. Make sure your TV’s operating system is up-to-date. Go to [Settings] >> [System] >> [About] >> [System update] >> [Check for update];
4. As a last resort, you can try performing a factory reset on your TV. Go to [Settings] >> [System] >>[About] >> [Reset] >> [Factory reset]. Be aware that this will erase all your settings and data, so make sure to back up any important data before proceeding.

Scenario 2: 
If the issue occurs while you are using external devices like a soundbar, please refer to the following steps:
4.Check external devices connected to your TV by unplugging the cable and plugging it back. Make sure all cables are securely plugged in as loose or damaged cables can lead to audio issues;
2. Restart your external device as sometimes a simple restart can resolve the issue.
If the above troubleshooting methods can’t resolve the issue, please contact our local official service center or your seller for further assistance. They will help you in this regard.
Friendly Tips:
The recommended bit rates of the video stream are shown as below:
1. The 4K UHD video stream requires 10Mbps;
2. The 2K video stream requires 5Mbps;
3. The 720p video stream requires 2.5Mbps.