There's a slight buzzing noise when I put the camera right is next to my ear. I can only hear it when the lens is extended (i.e. It isn't there when the camera's turned on using the playback button), and the sound persists even when I turn off the lens IS.
However, it's not what I'm hearing through the headphones.
Try playing with the audio settings by changing "Recording mode" to "Manual". In video mode, this will enable "Audio recording level" when you hit the SET button in the image preview screen.
Try starting from 0 and raise the audio recording level until you can hear the reported noise again.
Since users may have different levels of ambient noise in their respective environments, maybe this could help us get on the same page.
