The slides for Chapter 3 are here: https://docs.google.com/presentation/d/13CQMqwLLqOfpy3jyjMUiN_eSKB6fUOCsYgSVv89XfgU/edit?usp=sharing
Links
Slides for Chapter 2
Major and minor
What happens if you make minor songs major, and vice versa?
Music of integer sequences
https://oeis.org/play.html
Modes of vibration of a guitar
http://www.acs.psu.edu/drussell/guitars/hummingbird.html