Interval Notation
This is a video regarding interval notation, that is applied to one of the courses I teach.
Nerdy tech details: Shot using a Canon Rebel, then an after four failed attempts at editing and rendering the file in Adobe Premiere Elements 2019 (I got a BSOD each time), I re-edited and re-rendered under kdenlive in Linux. which gave me a nice sized file, which you are now watching. Yay for open source software! There is nothing special about the sound; it was from the camera microphone, and nothing was done to it.