hello, i am considering buying my first ibook G4 but want to know more about garage band. i would like to use gb to record music lessons which go for about one hour each and eventually store them all as mp3 files on my machine, a total of about 400 hours. is it possible to do this with garage band and how? does gb retain original sound quality as well as a tape recorder? alternatively, is it possible to digitally convert audio cassettes to mp3s on the ibook G4? thanks in advance!