The soundtrack can be previewed here:
Blue Exorcist Original Soundtrack 1(Soundtrack) (http://www.hmv.co.jp/en/product/detail/4044475)
Ao no Exorcist Original Soundtrack 1.zip (http://www.mediafire.com/?qdf6zf2hgu39lfz)
ps: also, on nyaatorrents, for those with mediafire-problems: Ao no Exorcist Original Soundtrack 1.nyaa (http://www.nyaa.eu/?page=torrentinfo&tid=222824)
Ao no Exorcist Original Soundtrack 1.zip (http://www.mediafire.com/?qdf6zf2hgu39lfz)
ps: also, on nyaatorrents, for those with mediafire-problems: Ao no Exorcist Original Soundtrack 1.nyaa (http://www.nyaa.eu/?page=torrentinfo&tid=222824)
Thank you SO MUCH 😀
I waiting so long!
Good Anime and Music 😉
Also bonus points for the lyrics being written in good English. As for the vocalist . . . she leaves something to be desired in the enunciation department.
Bouncing from electronica to orchestral to piano solos to symphonic rock and everything in-between, no combination seems to be too out there. Electronic programming dubbed over a live snare drum in a parade-like ensemble? Yeah, no problem there. That’s just an inkling of the diversity of this OST.
Let’s put it this way, you’re not going to get bored anytime soon. At least, not until OST 2.
Considering this OST is out and we’re not even at episode 13 yet, I think it’s almost a given we’re gonna see 3 or 4 OSTs out of this one, especially if the anime runs for 50 or so episodes like it is rumored to.

Album Information (VGMdb) (http://vgmdb.net/album/25549)
Ripper: ASL (http://koe.anime-sharing.com/anime-ost/ao-no-exorcist-original-soundtrack-1-4333/)
FLAC – https://mega.co.nz/#!OlQFRbwS!z5i7KNAm7bOSqgun1-LmiaZz8CML4P8EG5VCYMtsB3Y