In general, the traditional approach to music, learning an instrument, is being replaced by computerized, mechanical methods. The producers have come to regard the music track, not countuing the vocals, as one of many production values -- lights, dancers, video effects, on and on.

(I was told that hip hop backing tracks come from three or four production studios. Most digital work stations supply loops that can launch the budding hip hopper into immediate stardom.)

That's only one factor. Electric guitar is a flexible instrument, and we are told that the musician actually plays the amp. I see it developing in that way -- triggers, controlled voltages, effects, etc. Kind of the Moog concept.

Now then will the system of tones and harmonies disappear?

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