Ever noticed that many of the world's most influential drummers have a deep understanding of music and also know how to play another instrument? Modern Drummer founder and publisher Ron Spagnardi has, and with this newbook/CD pack, he sets out to teach drummers the essentials of theory and harmony using a keyboard. He covers: major scales, basic chord structure, inversions, diatonic harmony, chord voicings, extensions and progressions, and morevital topics.