It's a "WAV" file rip of the Internet stream....that way it didnn't get more compressed or whatever...but yeah, that's why it's so large. If you want, you can now find it streaming at Youtube:
<--------- Make sure to click "HQ" in order to listen in better quality.
This song actually reminds me of Tweekend which is my personal favorite TCM cd. I've got no fucking idea what Matisyahu is saying for the most part, but it's a damn catchy tune.