This has to be some kind of record! And this one song had better be a great song.
The soundtrack CD for Echochrome 2 is 75 minutes long, which is a pretty good length for any game. What's crazy is that the whole CD is just one track. AndriaSang says that the soundtrack, "Mugen Kairo Hikari to Kage no Hako: a Soundtrack," has but one track, named "Prime # 4507." It will be released in Japan on December 29th, right after the PlayStation Move game, which comes on December 23rd.
Everything we've seen (and heard) of this game looks fantastic. It looks to be one of the better uses of the PlayStation Move that I've seen.