Get a phono stage (no need to get something expensive or large) and a sound card with a balanced line in like the Audiophile 24[9]6. If you have DJ aspirations, you can get a mixer in lieu of a phono stage, since real DJ mixers (a Rane, for example) have the phono stage built in.
I demand a dedicated ADC for transfers, but that's just me. When James Chance gave a guitarist I sometimes work with a cassette tape of songs to learn, he passed it onto me after transfe[r]ring it with his Lucid 2496 as a 96k sound file on a DVD-R, which he did so that I could differentiate between parts with greater precision while being forced to learn them. It's amazing how good the ADC made that tape sound -- it seemed to have detail I'd never have heard in the first place.
The recording will sound tinny and weak without a phono stage.
Are you setting your recording to the proper frequency range and bit resolution for a CD/Mp3 transfer, if that's what you're doing? Record the high-res version when the media is there. For now, 16-bit, 44.1k.
Bypass the amp entirely and be conservative about digital levels. Analog tape likes a bit of distortion for warmth. Digital never does.
(If you want to hear a great example of an IDM CD mastered entirely from vinyl, listen to Icol Diston, by Arovane. It's on the Din label, which means it was mastered by Pole. It even has a few minutes at the end of the stylus cycling and clicking.)
Here are a few sites for you:
http://www.dandello.net/articles/vinyl.shtml
http://www.tdk.com/support/howto/arc..._computer.html
http://www.extremetech.com/article2/...,853854,00.asp
Try these as well:
http://homerecording.about.com/c/ht/...=vinyl+records
http://homerecording.about.com/libra...y/aa010200.htm
(the second article is egregiously obvious, but notice the restoration software mentioned by the author)
I'd love to hear kwkwarth pontificate on this subject, since I'm merely a musician/composer and he's a crackshot old skool engineer. If ever I break down and go back to working with a certain successful engineer/producer I've spent the last five years avoiding in a desperate bid for sanity, I'll ask him for special tips as well.