This soundtrack is the coolest! I love the music in the game, and all of the lyrics are on this soundtrack, unlike on the in-game sound test where they cut a lot of the lyrics, with the exception of Sonic's theme song.
My favorite tracks are-
1. It Doesn't Matter (theme of sonic)
2. Event: Let's Make It!
3. Escape from the City ( city escape)
6. Unknown from ME (theme of knuckles)
9.That's the Way I Like It ( metal harbor)
10.White Jungle (I forgot the song name!)
13. Dive into the Mellow ( aquatic mine)
15. Fly in the Freedom (theme of rouge)
17. Space Trip Steps (meteor herd)
19. Beleive in Myself (theme of tails, even though I like sonic adventure DX's version a lot better)
21. Throw it all away (theme of shadow)
23. Supporting Me... (biolizard)
24. The last Scene (is a very sad song if you saw the last scene in the game)
25. Live & Learn (main theme)