I have a USB Headset / Microphone which works fine on the host, but does not produce input when connected to the Windows 7 Guest. The device is recognised and is listed in audio devices, and the sound output works. The sound input reports itself as "ready" - I notice though that the input is listed as "line in" even though it is USB. Having said that, the device properties do identify it as USB.
I've disallowed exclusive use, just in case anything else was taking the input - and it's not muted 
Does anyone have any suggestions for things to try?
Host: Ubuntu 12.10
Guest: Windows 7
VMPlayer 5.0.1 build-894247
David