Capo.app

Capo is the ultimate app for learning a guitar solo. You drop in a song, and Capo can adjust the pitch and speed of the song for you to learn any song you’d like (well, any DRM free song). The functions themselves work suprisingly well; bending pitch and adjusting speed often distorts the song, but little distortion was found when I tried.

Capo is $40 introductory (this is a bit high for two features if you ask me), and will soon be $50.

Now, if you can rip out vocals, change the pitch and export, i’ll buy that.