Hi I've just purchased a c210 and am finding the two-way audio quality is so terrible it is completely unusable. 

1 -the mic on the device seems to have noise suppression enabled, which is heavy-handed and horrible because it creates many artefacts (eg bitcrushed hissing like a bad MP3) especially audible when camera is placed in a completely quiet room.

Maybe the microphone quality on the devices is poor?

But there should be options to tweak the audio quality / bitrate etc...! (it's 2024)

Please also add options to adjust or disable noise suppression. This is a security device and poor microphone audio and automatic noise suppression are interfering with accurate monitoring. 

2 -The 'Talk' Audio quality is unusable and unreliable. It cuts in and out, sometimes lagging, and other times is completely chopped up and unintelligible. We have tried from both Apple and Android flagship devices, from an absolutely silent room, also with good WiFi (and have tried on cellular data too). It makes no difference. 

We have the latest firmware and Tapo apps for ios and Android. 

-we have followed guides online eg turn camera mic and volume to Max, keep device unobstructed etc it makes no difference. 

-we have tried on 1080p and 720p settings to see if reducing the video quality improves the audio but it makes zero difference. 

It seems the audio stream is such low bitrate it is unusable. It is SO BAD we are thinking of returning the c210 and would try a different manufacturer. In 2024 a product from tp-link (a flagship manufacturer) should not be this poor quality. 

New firmware should add options to disable noise cancellation and improve the bitrate of the Talk Quality from a phone to the unit. Whether this is done for the unit or for the Tapo app, or both doesn't matter - it needs to be done otherwise the talk and listen features are useless. 

So far is really a disappointment.

The video quality is fine - but the talk / listen features do not work as advertised. 

In summary;

-two-way audio is terrible. It's unusable. 

-A Firmware Update (and/or app update) needs to increase the bit rate for audio in both directions and add options to remove noise suppression on the c210.