Capturing sound through SPDIF input.

[allnighter]

I have an ABIT motherboard with Toslink optical I/O.Both optical I/O are connected to my AV Amp.The built in sound card is a Realtek AC97.
What tools do I need to capture digital audio through the Toslink optical input into my computer and create audio files.
Basically I have some LPs recorded digitally into minidiscs, and I want to transfer the music on those minidiscs to the pc(through the optical input) and create mp3 files out of them.
I have Nero7 installed on my computer so what else do I need to capture sound and create mp3 files??

Thank you.

[allnighter]

After experimenting with many programs, I found "3D MP3 Sound Recorder G2" most versatile and suitable for the type of sound capture I want to achieve.