[saalweachter]

Those born in the 20's & 30's are already in the "music on demand" generation, who grew up after the point at which you could listen to your favorite artists play your favorite songs [on record], whenever you want, or turn on a radio and hear new music any time you wanted to.

[canoebuilder]

That’s an interesting point of reference. I have thought about what a big change it was to go from a sheet music and live performance only world to a world with audio recordings.

You’ve identified the early electromagnetic signals era, then think about the huge expansion in bandwidth those signals have undergone. From a handful of local radio stations and a finite number of grooved vinyl(or whatever medium) at your local shops. To a virtually infinite arrangement of pixels on your screen, waveforms coming out of your speakers. A few taps on your local signal processor and you can have virtually anything delivered to your door, or undertake any number of your other day to day affairs.