Music theory made easy! This laminated card is the definitive charting, transposing and music theory tools for all musicians, no matter what their instrument. The Table of Keys is the best transposing tool ever made because it also shows how to write chord charts using "The Nashville System" of Roman Numerals to represent chords: I, IV, V etc. This table is indispensable for students, teachers, arrangers, composers, choir directors, band leaders and songwriters. As one music teacher told us: "It's like having Juilliard on a card!" Laminated Reference chart 8.5" x 11",