The length is the playing time given in seconds ... took me a while to work that one out, and it is useful if you are looking for a different, or complete version of a song,

.......and in response to Kathy, I'm not too sure I can tell the difference between a 320 kbs file and a 128, I have converted some down, and I'm darned if I can tell the difference. I have some dire sounding 320 kbs files, and some totally adequate 64 kbs. (which take up less space and are quicker to download) I suspect the difference only becomes apparrent if you are listening through very fine and expensive equipment. this could make an interesting discussion........