In the Xbox 360 release of the game, you can turn off a stage's music by playing personal music via the Xbox Guide and then pausing it, allowing for harder-to-hear ambient/field recordings that play in the background of certain stages to be heard. For instance, one spot in the Nighttime Spagonia hub area plays a sound clip of someone whistling while taking a shower; the song being whistled is Sonic Unleashed’s theme song "The World Adventure", and a shortened edit of the same whistling is featured in the first teaser trailer for the game.