Music of the Spheres – by Mike Overly

October 1, 2015

What would it be like in an era when music and astronomy were sister sciences?

According to the ancient Pythagoreans and many later writers, all of nature is a musical scale. Music illuminated the study of astronomy, while astronomy provided a context for understanding music. The study of astronomy, music and mathmatics were deeply related in Galileo’s world. Galileo’s father, Vincenzo Galilei, is credited as one of the founders of the Italian opera and a major contributor to music theory.

In the Earth-centered model of the universe accepted during the Renaissance, a spherical Earth lies in the center surrounded by the regions of earth, water, air and fire. Rotating heavenly spheres, nesting one within the other from the Moon all the way out, carry the planets and stars. As these solid celestial spheres turn in place, their harmonious motions create the music of the spheres from which Johann Kepler formulated the harmonic law of planetary motions.

Visit with two-time GRAMMY® nominated Music Educator Mike Overly at

Intervals Unplugged – with Mike Overly

May 20, 2015

Center ViewJoin GRAMMY® Nominated Music Educator Mike Overly as he explores the Unplugged Intervals of Pythagoras, J.S. Bach, The Beatles, Black Sabbath… plus more!

Secret Fretboard Angles Revealed – by Mike Overly

August 7, 2014

beatlesAs the Beatles sang: listen, oo wa oo, do you want to know a secret…

Wouldn’t you like to be let in on something that other guitar players don’t know? Imagine what you would be able to do with this hidden information. Well, here are three little known, and rarely understood, secret fretboard angles that will change the way you view your guitar fretboard. Does the following look familiar to you? It should, it’s your fretboard!


Simply stated, X is the horizontal strings, Y is the vertical frets, including the nut and bridge, and Z is the diagonal octaves. This simple fretboard geometry is the key which unlocks your ability to instantly locate any letter on your fretboard. Let’s reveal the first secret angle, the horizontal strings with their letter names:

horizontal strings






Next, let’s define the string’s length by revealing the second secret angle, the vertical nut and bridge:

vertical nut and bridge





The distance between two pitches, whether letters or tone numbers, is called an interval. The smallest interval is the half step, which on the guitar fretboard is one fret. Here’s a very old discovery made by Pythagoras, 6th Century BCE: when a string is divided in half, the frequency is doubled, and the octave is created. The interval of an octave is 12 half steps or 12 frets. Therefore, fret 12 divides the string in half and creates the 1st octave. Then, 12 frets higher, fret 24, the string is divided again and the 2nd octave is the result as follows:

two octave 24 fret fretboard





We can now reveal the third secret angle, the diagonal octave. This simple angle enables us to locate any letter, on any string, faster than we every thought possible. Here are all the E’s within 12 frets connected by the diagonal octave angle:

diagonal octaves






Remember, although all the letters are the same, they are not all in the same octave, but that’s another lesson. So, let’s end this lesson by showing the 7 letters of music, A B C D E F G on 12 frets:

7 letters on 12 frets






’til next time, have some fun connecting the diagonal octaves of all 7 letters because it’s a secret no more . . . I’ll be listening!

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