In music, a triad is harmony of 3 different letters and a tetrad is harmony of 4 different letters. In major scale harmony, the I chord is a major seven tetrad. And in the key of C major, the I major seven chord is C major seven. The C major seven tetrad is spelled in letters: C E G B, and in scale degree tone numbers: 1 3 5 7 . . .
GRAMMY® Nominated Music Educator Mike Overly shares his unmatched perspective on fretboard education with everyone, from the amateur hobbyist to the serious professional player, as well as any music enthusiast who wants to come along for the ride.
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