xbox song 8mb? Why so big?

[hiennhan12]

8mb for one song seems like a lot for the new Xbox music songs. I remember when I used to download songs from zune on my phone they were like 2-3mb. Why the increase of amost 5 per song? am I missing something here? Better quality?

 

[pkcable]

Could be a better quality, OR it could be the compression is not as good.