Harmonics arise naturally from the resonances in strings and pipes. A video demonstration (Ruiz 2016
YouTube: Tuba Harmonics ( https://youtu.be/souhEzOP9c4 [https://youtu.be/souhEzOP9c4] )) is provided
where a tubist (coauthor Holmes) produces a phenomenal 24 harmonics using a single tuba pipe length
by controlling the buzz of his lips. The frequencies of the harmonics, measured with the free
software program Audacity, fall excellently on a linear fit using a spreadsheet. The skillful
musical production of so many harmonics with a fixed pipe length is an extraordinary illustration of
physics.