@AniLi 

Hi,
Could you please confirm whether this issue only occurs when playing lullabies or white noise, or does the same static noise also happen during live view or playback recordings?
For troubleshooting the noise issue, we recommend referring to this FAQ for detailed steps: How to Reduce Noise on Tapo Cameras

If the problem persists, contact our customer service team and provide the results of the above troubleshooting steps.

Best Regards,

  @Hilbert-TP 

only occurs when playing lullabies

  @AniLi 

Hi,

Thank you for your update.

This case seems to require further investigation. To assist with this case, a specialist will help to follow it up through email. Please check your inbox later to confirm.
If the email you used to register for the TP-Link community is not your contact email or you cannot access it, please send me your contact email through private message.

 Best Regards,