An exotic cable involving a USB plug really shouldn't be necessary. I use my laptop when I am recording LPs or cassettes, and I run the signal into the mic-in plug. A small pin-plug (is that an RCA plug?) to small pin-plug connector should work fine...run it from the headphone-out jack on the cassette player to the mic-in jack on the PC. Big to little adaptors for the headphone jack are readily available. If you are using a cassette deck that is part of a stereo system, run the line from either the Right/Left jacks of the receiver/amplifier or the deck; I found that I didn't have enough gain if I ran it through the receiver. You will need the appropriate Y-adaptor, but they are also readily available. Some kind of software is necessary; I use Magix Audio Cleaning Lab, which costs something around $35 US, but there are a lot of things out there.