With a mathematical calculation using the x and y coordinates of the pupillary axis and with the application of Pythagoras formula, the chord length can be obtained by the square root of the sum ...

You’re adding another note to the power chord formula this time around. First of all you have your root note and second note two frets up from that as before; but now you’re going to add a third two ...

Here’s how it works. Diminished seventh (or ‘dim7’ from here on out) chords are nowhere near as scary as they sound - once you know the formula for how to put them together, they’re pretty easy to ...