Ever since I freshly installed Ubuntu 12.10, I have sound issues during Google+ Hangouts. I hear a strong echo, reverb, and what not. Mostly after 5-15 minutes it corrects itself, but not all my conversations are more than 15 minutes (and it's still extremely annoying).
If I Hangout via my Chromebook, I don't have this problem, and the Hangout settings are the same on both. And as I didn't have this issue before 12.10, and I haven't changed any hardware, I am assuming it has to do with Ubuntu 12.10.
I tried to change all the audio settings I could find (in the Hangout and via System Settings), but the problem still isn't solved. I also have this problem on other user accounts, if that's important somehow.
Since a couple of days the problem has disappeared. That is, the reverb and echo are gone after a couple of seconds of starting the hangout. I did upgrade to 13.04 a month ago, but the problem remained, so I'm guessing that had nothing to do with it.
I am assuming Google improved their sound settings with their new hangouts and that it was never an Ubuntu issue (which makes sense as I had no other sound issues).
Ubuntu 12.10 64-bit | AMD64 Athlon II X3 | 3.2 GHz | 4GB RAM | ATI Radeon HD4250
Chrome | webcam with microphone (USB) | Speaker (mini-jack)