Thank you for reporting this bug to Ubuntu. Ubuntu 12.10 (quantal) reached end-of-life on May 16, 2014.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. ** Changed in: pulseaudio (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1152987 Title: Echo cancellation only produces a mono sink Status in pulseaudio package in Ubuntu: Incomplete Bug description: If I run "pacmd load-module module-echo-cancel" the source/sink is created, but in mono on a stereo source. If I run "pacmd load-module module-echo-cancel channels=2" The loading fails, pulseaudio crashes and restarts, and I get this in syslog: "Mar 9 16:13:26 trancendence pulseaudio[2303]: [pulseaudio] speex.c: AGC, denoising and echo suppression only work with channels=1" Not sure if the webrtc engine supports more than a single channel, it fails to load on 12.10: "Mar 9 16:08:44 trancendence pulseaudio[2303]: [pulseaudio] module.c: Failed to load module "module-echo-cancel" (argument: "aec_method=webrtc"): initialization failed." To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1152987/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

