So I have had this question for awhile. How do cd producers and tv broadcasters get a universal volume? in other words, how do they make it so whenever you shuffle songs on your ipod or surf channels, you don't ever really need to change the volume from song to song or channel to channel? does that make sense? What standard do they use to do that? for example, whenever i mess around with garage band or something and export it as an audio file into itunes, I get a significant drop in volume compared to other songs. Just kind of curious?