Hey,
I've already posted in here because I had this issue but it is now fixed on my windows 8 computer. I get perfect recording levels with my USB mic on my windows 8 laptop. After I posted bfore a few people commented to say how my fix couldn't possibly work as the firewall can have no bearing on recording level and I totally agree - it makes no sense whatsover to me either but all I can suggest is that there is some quirk as when I did it the recording levels worked fine.
I thought I'd post again just in case any of you have the same luck I did.
- I went to the main screen and searched on "Firewall"
- Clicked on the 'allow an app through the firewall - see below.
I use Adobe Audition and that wasn't listed in the apps in the box below so I clicked on
"change Settings" see below
Then "allow another app" and I added adobe manually.
Right click on the speaker icon and then select Recording Devices in the menu below.
Double click on your USB Mic
Select the "Levels" tab and make sure it is set at an adequate level. (just in case anyone thinks that it is this level setting that fixed the issue rather than the firewall settings - believe me I tried all of this before and nothing worked)
I really hope that this helps someone.