trying to rip speed devils, but music tracks are 437 megs each!

yo, im ripping speed devils ,i got all the audi tracks and everything but its huge!, the audio tracks (.raw) are about 437 megs each ,wow! and when i do track03.iso.gz (the first one) its only 280 odd kb's! and it should be loads more!!!! noooooooooo! HELP ME!