Nobilis is teaming up with "famous Japanese music teacher" Shiro Tsuji to deliver 21 lessons covering the basics of music theory. These will take the form of minigames that test your sense of rhythm, your memory, and your musical ear, amongst other things. There'll also be virtual instruments, such as a piano and drums, to practice your new skills on.
All of which sounds like it could be an intriguing addition to the DS training genre. We just wish we had some media to gawk at -- at the time of writing, even the official website, as included in the press release, isn't up.
[Via press release]