USB generic audio driver Line level input

I know this is a late reply, but this link addresses the level problem. The fact that it is on the ART Pro Audio site doesn't matter - that is where I obtained the answer.
Applied Research & Technology: Technical FAQs

Hi gliebisch, I hear you man! Generic drivers cause USB sound cards to operate at mic level. grrr!! Funny how many people didn't understand the issue... I prefer using simple USB sound cards because using generic drivers simplifies setting stuff up, and progs sharing audio and stuff, but the sensitivity issue is a pain....
Have you come across any solution yet?
I thought I might have a hunt round to see if there's a third party driver solution/ fix?

I have discovered a work-around for the Annoying Windows 7 generic USB sound device running at mic level, not line level (thus overloading):
Go to properties for the sound card:
(right click volume icon/select recording device/double click your USB sound device (or select it and hit properties),/then in Advanced tab, select |Set Default| and |Apply| or |OK|.
Now do it again and select |2 channel 48k| (or whatever you want) and hit |OK|.
NOW IMPORTANT BIT!!!DO NOT CLOSE THE SOUND CONTROL PANEL. it is now set to line level as long as you don't close it, just move it out of the way!!! open your sound app and you will see that the input is at line level, and you can leave the levels tab at 100% and not have distorted/clipped sound!
If you close your application and close the control panel and open your application again the input will be overloading again.

...spread the word...

I found the solution. Obviously I hope it works for you.
USB Audio ASIO driver - Descarga gratuita y comentarios de software | CNET Download.com
The USB Audio "Microphone" changes automatically to "Line In"!
And the levels are... perfect!