Why isn't the speaker volume on the POCO F7 Pro adjusting smoothly?

Thank you for your support of Xiaomi products and we apologize for the trouble this has caused you. Mobile phones undergo strict professional inspection before leaving the factory, so you can use them with confidence.
If you notice that the speaker volume on the POCO F7 Pro isn't adjusting smoothly, you can refer to the following methods:
Method 1:
1. Go to [Settings] on your phone;
2. Find and tap [Sound & vibration];
3. Slide the volume bar to adjust the volume you want. 
Method 2:
1. Go to [Settings] on your phone;
2. Find and tap [Sound & vibration];
3. Tap [Sound effects];
4. Turn on [Immersive sound]. Experience immersion and a sense of space when audio is played.