aerasio

Alright! Figured out "3) Ambient music from NHK ni Yokoso"!!!

the Main melody is E-minor, a weird F chord with a D note in it, and a C/G. Uhh, for an example of what all that sounds like, watch the first 2 minutes of the second episode of Welcome to the NHK, linked here.

I'd talk about what the rest of the chords are but there doesn't seem to be much point.

So said Aerasio at 23:18