Thank you for your support of Xiaomi products, and we apologize for the trouble you're experiencing. If you need to reduce background noise, you can turn on the smart noise reduction switch, which reduces the impact of other sounds on the recorded audio while shooting video.
To turn on the smart noise reduction on the phone, please refer to the following steps:
1. Go to the [Camera] APP on the phone;
2. Swipe down the screen and go to [Settings];
3. Find and go to [Audio settings];
4. Turn on [Smart noise reduction].
Note:
If you pursue real background sound, you can turn off [Smart noise reduction].