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It's by Jun Senoue. I think Amazon sometimes has the official soundtrack, but beware, there are a lot of pirate versions out there. I think the original doesn't have all of the tracks from the game on it.

You could always try eBay, but those are more likely to be the pirate version.

Look here for further information on how to detect a pirate copy and make sure you're buying the original - after all, Jun Senoue deserves the royalties, right?

http://www.digital.anime.org.uk/piratefaq.html#acd (thanks to Nuala for pointing me in this direction)

DW

EDIT: looks like Amazon *may* stock both legal and illegal versions. One calls itself "official", one is "multi-dimensional". I have the latter and, from the above website, I reckon the copy I have is a pirate sad It may be, however, that what I have is a pirate copy of an official release, in which case Amazon is more likely to stock the official version than a normal eBayer. Hence I only say they *may* be unaware that they have a pirate version. Looking at the item description, they list a different label, so it's probably legit. They also list the "vocal cuts unleashed", but that apparently is out of print.

I tried www.cdjapan.co.jp for you, but they only have the official Sonic X soundtrack (well worth investing in, IMO) and the official Sonic Heroes soundtrack (not the vocal versions).

Amazon.co.jp has the official SA2 soundtrack as well. PM me for the link, I had to wander around a bit to find it!