Why are some videos on the Xiaomi 17 Ultra silent or have background noise when using TikTok?

If some TikTok videos played on the Xiaomi 17 Ultra have no background sound or contain background noise, please refer to the following explanation:
1. Some uploaded TikTok videos do not include background audio or contain noise due to the original recording environment.
2. You can try playing the same video on another phone to confirm whether the audio behavior is related to the video source.
3. If the same situation occurs across different devices, the issue is related to the video itself rather than the phone.
4. The Xiaomi 17 Ultra undergoes rigorous audio quality testing at the factory. Please feel confident in using your device.