It depends on your stereo system, but it should have some type of audio out jack. Get the appropriate audio cable (preferably gold-plated to increase the sound quality) from your local electronics store/department (Radio Shack, Walmart, etc) and connect it to the audio out on your stereo and audio in on your computer. Then, use a free program such as Audacity to record the music as your stereo plays it. Save the file as an MP3, WAV, etc, then burn it to CD using your burning software.
Hope this helps,
I have a lot of cassettes i would like to take the music from and place either on cd or on my computer. Does any one know how to do this or am i up a creek.