Transpos-O-Matic is a chord finder tool to find and transpose chords easily & learn music theory. Transpos-O-Matic Music Slide Rule (Chord Finder Tool for Guitar, Piano & Songwriting).

Transpos-O-Matic is a must have reference tool for basic music theory, it’s great for transposing, you can transpose between keys and see at a glance to change chords and define progressions. Great tool for the practicing musician, music teachers, instructors, students, professionals, and hobbyists.

The backside of the Transpos-O-Matic includes some of the basics of music theory. Chord spelling, Key signatures, Key Spelling, Clef/Staff Definitions, and more. Transpos-O-Matic music slide-rule is one of the most valuable gadgets for a musician. Designed by David McCord, it fits nicely into a guitar or instrument case but thin enough to use as a bookmark.