This is the *exact* same issue that I have.
The cause for it is electromagnetic interference from your PC. You'll notice that the sound gets extremely crazy when your hard drive is accessed and/or when you scroll through a webpage.
It took me weeks to find a possible solution and trust me when I say that I know more about this problem than anybody else, at this point. lol!
Two other people reported that this solved the issue entirely ; a USB isolator. It purifies the signal and manages to separate the noise you're referring to from the music you're trying to play.
Here is the exact USB isolator I've ordered ; it's made by Olimex. https://www.olimex.com/Products/USB-Modules/USB-ISO/
By the way, here are some things that were suggested to me which didn't fix the issue ;
- Different shielded USB cable.
- Testing all USB ports.
- Trying a USB controller card (PCI).
- Trying a USB cable with a ferrite on each end.
- Trying a USB cable with no ground or power pin.
- And many more...
And here are the threads from other users who experienced the same issue.
I've ordered it through DigiKey and will hope that nips it in the bud once and for all. It seems to be way overkill for my usage but I couldn't find any real-world experiences from users having tried the aforementioned USB isolator, so I ordered one that I could verify has worked for other end-users like me.
Lastly, here is my thread about this topic ; http://www.overclock.net/t/1497894/emi-driving-me-nuts-no-sound-card-using-usb-help
I will be taking possession of the Olimex USB isolator this weekend, but I'm 99% sure it will fix the issue. It can be ordered from many different places, including Amazon. I'll be sure to let you know the outcome.
Grounding got me thinking. I took the power supply off the surge protector with all the other gear and moved it to a different plug. Same circuit in the house but now off the surge protector.
Glorious sound. Totally different than an hour ago. I still need to do a sound test to see what I like better. On board or the T1 (the onboard is supposed to be dam good). Anyways volume is what I expected but..., yes there is a but, there is still a little clipping in the low end. I am going over some non bass heavy tracks and they are great, to a point. The bass...
In one song I have is this long unending bass tone (well multiple notes but you get the idea) waving around to make this soundscape. It is nice on the onboard, It sounds like one long undulating sound. But on the T1 the sound feels broken up into chunks. There clearly is clip, it's nothing huge but it is distinctly there if you listen for it.
Any ideas anyone?