I recently bought Tapo C225 and C500 cameras. The audio quality of both cameras is poor, so I can't hear conversations clearly.  They are much worse than my old TP-link cameras.  I notice that the background noise level of the old cameras is high, but I can hear the conversations clearly.  I think the issue of the new cameras is caused by the noise cancellation.  But I can't find a way to disable the noise cancellation feature. 

I read from another post that other users of C220 solved this issue with another firmware:

https://community.tp-link.com/en/smart-home/forum/topic/658276

I would like to know where I can find the firmware to disable noise cancellation for C225 and C500.  Thanks a lot!