Chapter 5 includes two kinds of media example: commercial recordings found on Spotify and recordings found on YouTube.
If you click on the embedded playlist below, follow the link to open the playlist in Spotify; tracks will play from random starting points in the embedded player.
Spotify URI (copy this into the search field in Spotify): spotify:playlist:2Bq7d93FYrwZ4JtCf8yqNl
Start Times:
For the excerpt from La Traviata, start at 2:49 (or start at 2:39 for a parallel passage in which accompaniment voices are more clearly audible).
For the excerpt from the Overture to Die Fledermaus, start at 3:18.