I'm not completely sure where this bug comes from, but my tests suggest it's a problem with the ALSA USB drivers rather than Pulse, so I've added the alsa-driver project to the affects list. Please feel free to move this if any new evidence suggests it's coming from somewhere else.
** Package changed: pavucontrol (Ubuntu) => alsa-driver -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1048326 Title: fast-track-pro usb// pulseaudio - MIC INPUT problem To manage notifications about this bug go to: https://bugs.launchpad.net/alsa-driver/+bug/1048326/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs