Thanks, I enjoyed that very much. "The engineer could easily explain it all in 10 weeks" made me laugh. I'm still trying to figure it all out after 40 years!
Also check out the companion video on stereo listening and hi-fi, and the now-quaint notion of just listening to music as an activity in itself. I especially cracked up at around the 6-minute mark, when the guy starts talking about what it takes to be a hi-fi enthusiast - see if you can't relate!