Musicology

Divide a vibrating string in half
To create an octave interval
Divide the octave into 12
Semitones create - you will

Choose but seven from the twelve
And create a key
To hear them ring out as a scale
Play these notes sequentially

Choose the first, the third, the fifth
From the key that was created
The foundation of a chord
Is newly differentiated

Now pass on to greater things
Minor, Seventh, Sharpened Fifth
But don't forget that - at its core
Math is what music is

Why should math expressed as sound
Fascinate and astound?
I guess that - just like all the arts
It's greater than the sum of its parts