This free guitar lesson by Peter Vogl will teach you some music theory for the guitar. An octave is equal to twelve frets on the guitar. For example, you can play an E note with either the open 6th string or by playing the 6th string at the 12th fret. We'll also look at some other ways you can play octaves on the guitar neck.
Watch the lesson: Quicktime
Guitarist's Music Theory Book Digital Download by Peter Vogl is the first music theory course designed for guitarists by a guitarist. This downloadable .pdf explains music theory as it applies to the guitar and covers intervals, scales, chords, chord progressions, and the Nashville Number System. The .pdf features embedded .mp3 audio files that play all of the music in the book and also includes an ear training section. The Music Theory Book was written to help all guitar players achieve a better understanding of the guitar and of the music they play. View a sample page. $14.95