A Line In jack on your PC? If so you can use that to record LPs and Cassettes. I have been copying old cassettes to mp3 and what I use is a Audio Cable ( http://tinyurl.com/PCaudiocable ), Audacity, and a regular cassette player. As far as making it Digital Quality, unfortunately, nothing can make it digital. It will just preserve the quality of the LPs and cassettes as is. I hope this helps you out.
I have many old LPs that I would like to convert to digital so I can listen to them on my mp3 or CD player. My old all-in-one "stereo" would need to be serviced before I can do this. Or, I could buy something that will do it easily in one or two steps.
I am told that conversion via my stereo and using Audacity or some other software would not give me a truly digital-quality final product.
But the products I have seen so far on the internet (the Ion turntable, Crosley or Teac all-in-one converters, etc.) all have their share of really negative reviews.
Any ideas would be appreciated.