There are many soundcards that allow for digital transfers.
Computers are very noisy machines, electrically.
If you were to convert an analog signal to digital inside a computer, you pick up all that noise and get a hissy copy. There are many wav editors available for Windows OS's. Cool Edit, Sound Forge, Samplitude, and CDWav are the most common. CDWav does not allow for extensive editing, but is the BEST way to split a show into tracks. Tracks can be created by using a wav editor.