Comment by stfnfhrmnn

I don't know of a website that compares audio quality specifically, but I feel this still is the greatest impediment when it comes to ANY video or audio conference system. I get the impression that there is no system out there that allows for decent 'full duplex' audio, equivalent to a normal conversation where both sides might interrupt each other at times. I think this comes down to

  a) background noise reduction
  b) echo/feedback cancellation
  c) input latency

I assume input latency may not be such a big issue anymore, with ultra low latency codecs (presumably) being widespread now. Feedback cancellation is a problem if any side of the conversation is using speakers, rather than headphones. I guess chat services meet at the lowest common denominator, making fairly conservative assumptions and often cutting audio aggressively.

My personal list, best to worst, in respect to my requirements above:

  Google Hangouts
  Jitsi
  WhatsApp audio call
  Skype