Hi Daniel,
Not sure if this will be much help, but I do VOs all the time. However, I use a regular mic, not a USB mic. The same mic I use for Skype.
But when recording with my mic, I don’t open the Capture room. I use the Voice Over Room (the mic icon on the left side of the main screen) in PD. And I ensure that the “Device Setting” is pointed to the mic, and not “stereo mix” for instance.
I have also noticed that on my desktop that I have to set the Recording Volume to Maximum. Yet I still get a very weak input signal, which I need to boost via WaveEditor in post production.
I notice that in your screen capture that the input volume slider is set very low.
However, doing the same thing with same mic in my PD11 on my laptop, I actually need to turn my input volume down.
I am guessing that my laptop input serves as, or has a built-in pre-amp boost at the mic input, that my desktop doesn’t?
And I know a few other members here who do use a USB mic successfully. Perhaps they’ll chime in.
I know this isn’t of much help to you, but both my Capture and VO rooms work OK on both rigs, with a lapel mic I got on Ebay. They were 3 mics for $5 plus shipping.
If interested, a VO example recorded in PD11’s VO Room (with one of these $1.50 mics), is available here.
http://www.youtube.com/watch?v=ugkSg7G-6DE
If you can try a standard mic, with the Settings set properly, and with the input signal maxed, and still don't get a signal, then a clean re-install of your PD would probably be the first course of action to take. Done it many times over the years.
I wouldn't think it's an audio driver issue if the mic works in other applications. But I'm not a tech guy, so I'll let others comment on that.
Hope you get it sorted out.
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