I litterally pulled out my belt and shook the belt buckle infront of the mic. This is exactly what one would think it is. This was recorded at the open window institute sound booth in centurion, south africa.
Giovanni Benedetti's 1563 example of a comma "pump" or drift by a syntonic comma (21.51 cents) during a progression. Common tones between chords are the same pitch, with the other notes tuned in pure intervals to the common tones.
Chord progression of La Folia theme, a common harmonic pattern in baroque music. After chord notation provided by User:Hyacinth at en:File:Later Folia.png. Self-made with Lilypond