Disc 1: the United States ends its neutrality and enters the Great War. Track by track, one side of one historical record sings:

Disc 2: in the same date range, the title of a song has promised its hearers a charm, and those who made the song audible have pledged their fidelity to its magic. But what ever remains of the music of time? Little did they seem to know, Madame Case and Mr. Edison and the performer of the obbligato, how breakable records are.

https://archive.org/details/edison-82078_01_2460