If you do, you can actually take your music and... put it on iTunes. You got any albums? I'm currently developing one as "Quadfire" and all that before I write RatKind.
It is awesome, with many tunings and all that. I rate it 4 stars, because they should be able to let us separate the voice from a song and use just the melody. I hope you get it (on the App Store, it's kinda pricey. Usually, it comes with Apple products).
