Analogue Panasonic camcorder. P4 3.2GHz ASUS motherboard. Pinnacle stereo TV/video capture.
1 TV works ok with sound
2 S-video input from camcorder good picture but no sound.
3 Composite video from camcorder to ancient MAC Performa (but no DVD/RW) sound and video ok
4 No composite video intake on back of new computer (no Rand L audio input sockets)
5 Compsite video audio jacks do not fit any sound input sockets.

What can i try. Going slightly demented. Please help.

ps not very computer knowledgeable therefore use simple terms to aid my understanding.
Bryce