I have the same problem.
same issue with StarConflict.
same with pulseaudio under 3.16.5-1-MANJARO Linux
System Info: http://pastebin.com/x7LxTrmr
I don't know if there is any relevance but I have another issue where mic works in my system (Arch Linux 64 bit), I can hear feedback from my speakers, but doesn't work in Steam at all, not even in mic testing. That is described in #3407. I wonder if there may be any connection?
Having same issue with CS:GO [#190](/ValveSoftware/Counter-Strike-Global-Offensive/issues/190)
Same issue still persists (7 years later!), tested with TF2 running on Gentoo, with ALSA.
Nothing extracted yet.
Linux debian 3.13-1-amd64 #1 SMP Debian 3.13.5-1 (2014-03-04) x86_64 GNU/Linux
Samson Meteor USB Mic
ALSA
System Info: http://pastebin.com/35EwbY0R
Steam voice test works fine. I can hear myself clearly but when I try to talk ingame, nobody can hear me.
Mumble and Audacity works fine.