Snippet from cisco site.
Cisco VT Advantage
There are some known issues when using Cisco IP Communicator Release 1.1(3) with Cisco VT Advantage.
Problem Description (CSCee00053)
When changing a USB handset or headset, the user receives the following error message: "Audio Tunning Wizard cannot configure this device to play sound. Cisco IP Communicator may not function properly with this device."
Workaround: Reboot the PC and insert the USB device for Cisco IP Communicator followed by the USB device for Cisco VT Advantage.
Refer to CSCee00053 for more information.
Problem Description (CSCee07575)
When using a USB Audio Device with Cisco IP Communicator at the same time as Cisco VT Advantage, user receives the following error message: "USB Controller Bandwidth Exceeded."
Workaround: Avoid using Cisco VT Advantage and a USB Audio Device with Cisco IP Communicator at the same time. Another workaround is to ensure that the the Cisco VT Advantage camera and the USB Audio Device for Cisco IP Communicator are using separate USB ports on the PC.
Refer to CSCee07575 for more information.