I have LifeCam Cinema camera and recently I need to set the sensitivity really high now to get decent level of audio. With high sensitivity (90+) I get audio level decent but a lot of high pitched noise. (both Camera and Voice recorder apps)
I have recording using the same camera and PC (and the same location - basically the same take) from 2nd May and the sound is loud and clear. Camera connected directly, video is as expected. The settings are the same .
I can see that the driver version on my lifecam is from 21st May. Though I must admit I am on Windows Developer edition - 21390.2025. My suspicion is that the recent drivers broke the audio on LifeCam cameras.