https://www.youtube.com/watch?v=-yUa8-MEHwc
Good explanation about strings using sympathetic vibrations to improve intonation
https://www.youtube.com/watch?v=suQbK7AA5XI
Watch these mechanical metronomes synch with one another
https://www.youtube.com/watch?v=mXTSnZgrfxM
Explains the Tacoma Narrows Bridge
https://www.youtube.com/watch?v=Oc27GxSD_bI
Demonstrates and discusses how the voice can break glass
https://duckduckgo.com/?t=ffab&q=viol+demore&atb=v241-1&iax=images&ia=images&iai=https%3A%2F%2Fvancikviolin.com%2Fwp-content%2Fgallery%2Fviola-damore%2FIMG_5166.JPG
Viola D’Amore Introduction by Rachel Barton Pine
https://www.youtube.com/watch?v=m1Qmmx7zoO8
Go to 18:00 mark to hear a performance on the instrument
Tuning the Hand with Physics and Feeling by Matthew H. Spieker
Spieker, M. H. (2022) Tuning the Hand with Physics and Feeling. American String Teacher. 72(1), 33-36.
https://journals.sagepub.com/doi/10.1177/00031313211065511?icid=int.sj-abstract.citing-articles.1