I added a bit more evidence (a full sized piano middle C video) to post #1. Here it is. The new stuff is in red.

My second post above (in post #1) references this music pitches table
http://people.virginia.edu/~pdr4h/pitch-freq.html
which has it correct (notice the "MC" standing for Middle C at C4).
Also notice this Full size Piano demo video agrees C4 is middle C and the lowest piano key of the video matches LP in the table.

https://www.youtube.com/watch?v=ZCIEcgRnMZc





Last edited by bowlesj; 12/18/20 04:32 PM.

John Bowles
My playing in my 20s:
https://www.reverbnation.com/johnbowles