The Doreen Allen Company is committed to developing innovative and useful tools for the music community.

The Doreen Allen Company is proud to present the TURN THE WHEEL • CHANGE A KEY music transposer and educational tool.
This general purpose tool is a valuable aid for students, teachers, musicians and anyone interested in understanding practical music theory.
One simple and sturdy tool is now available for only $11.95 that helps you transpose music quickly from one key to another, find corresponding notes in any key and do much more. This can be used for any instrument.
How it Works.
Determine the notes in a given scale
Find the notes in any chord
Transpose from one key to another
Find an unknown key knowing only one corresponding note (or chord) within the known (Present Key) and within the unknown key (Final Key)
Determine CAPO positioning on the guitar
Determine the number of sharps or flats in a particular key signature, and…
Much More!