Despite the low volume of the TV, one could determine that the music was without a doubt the Japanese soundtrack. Unfortunately, Ken confirmed that the US soundtrack would sadly not be available in the final version. (Sidebar from me: You can use the Xbox 360’s built in music player to blare your rare Sonic Boom! Music CDs.) What Ken stated on the matter is that they are still working to see what would need to happen on the legal side of things to get the US soundtrack in the final game. While DLC is a possibility, he’d much rather try to include the music for free, whether they can get it in the final or added in through a patch.
Sonic Retro article.
Last edited by Gamma The Great on August 27th 2011, 5:55 pm; edited 1 time in total