Register would not be what it is without the materials originally developed by the people below. A huge thanks to them for their work!

Creator of the excellent clarinet key diagram used throughout the app.

For his clarinet trill chart, which is available at

Author and publisher of Clarinet Fingerings: A Guide for the Performer and EducatorI first learned many of the fingerings in that book.

Creators of Essence, the icon set used for many of the icons used in the app.

For creating the fantastic app icon and for his ideas and suggestions. Check out his books on Amazon, Space Disasters and Space Disasters 2: Attack of the Zombie Alien Clones.

Special Thanks - Beta Testers

Jerrick Adams • Jordan Kursewicz • Michelle Morris • Daniel Woodall