Transpos-o-matic

The Transpos-O-Matic is a musical slide-rule - a simple and fast tool for the practicing musician, for music teachers, instructors, students, professionals, and hobbyists. With this simple device, you can transpose between keys, and see at a glance to change chords and define progressions. In addition to the functions of the slide rule, the reverse side of the Transpos-O-Matic includes some of the basics of music theory. Chord spelling, Key signatures, Key Spelling, Clef / Staff Definitions, and more. For 2014, the Transpos-O-Matic has been completely redesigned and is now a sturdier design. The overall size is now 8.75 inches by 2 inches, and fits nicely into a guitar or instrument case. Yet it’s thin enough to use as a bookmark. The Transpos-O-Matic has been designed by David McCord — a singer, songwriter, performer, guitarist and instructor for over 40 years. The device is always at the ready inside his guitar case, or on his music stand. It's many uses make this simple slide rule one of the most valuable gadgets a musician can own. Weekend campfire singers, professional performers, and college professors have all realized the benefits of the Transpos-O-Matic.