A little technical explanation needed. I was trying to explain MP3s to a friend of mine yesterday and while I understand what they are I don't understand what they came from! When I rip my music cds to my harddrive and they are saved as MP3 files (which are digital?). What are the files/music on the cd - analogue or whatever? A music cd converted to MP3 takes up about 40 – 50 MB of space and therefore you could save 10 or 12 music CDs on a single 700MB CD. Yet a music CD fills a CD. Thanks in anticipation.