The Limping Devil

So?

Do you already know who the Limping Devil is? The next time he appears, you should have solved this riddle!

Possibly the devil is just a name
Diabolus in musica, the crooked thief is playing a game.

Am I an interval,
a musical riddle, easy to solve all in all?

Ups, I think I gave me away,
can you smell the rat, nothing more to say…?

Der krumme Teufel