Morning, a hospital room. Screen pull out. Shinji sits up.
SE <<Voices of cicadas>>
Reichu: Do we know anything about this BGM, aside from the title?
Keisuke-kun: Traditional Japanese "radio exercises". (If you watch Battle Royale, Kitano-sensei does a bit towards the end.) It's a normal thing to hear in the hospital because radio exercises are usually practiced by old people (who have a tendency to go to hospitals).
Reichu: Speaking of Battle Royale, I wonder if it's the same audio that is used in NGE. They sound awfully similar.
Keisuke-kun: Radio exercises follow a specific form that's always the same and follows the music. It's made to be done by large groups of people in tandem. Some people do it every day really early because it's supposed to be good for you. If you go on a sleep away active field trip, you will probably do them, as well.