Gizmo Project uses the following codecs: GSM -- fixed bit rate, not loss tolerant, narrow band (8khz sampling rate). iSAC -- variable bit rate, loss tolerant, narrow and wideband (8 to 16khz). Varies based on Bandwidth, packet loss, delay iLBC -- variable bit rate, loss tolerant, narrow g711U/A -- fixed bit rate EG711 (enhanced g711) -- fixed bit rate, loss tolerant, narrowband iPCM -- fixed bit rate, loss tolerant, wide band.
Skype uses codecs from http://www.gipscorp.com/ Also I think that had the same problem with Ekiga. Maybe this is a problem with the way Ubuntu receives data from the microphone. -- Sound card noise during VoIP https://launchpad.net/bugs/82324 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs