These guys must be brilliant.
Long ago we had a huge old oscilloscope on the ship I worked on once in a while, and we would hook the stereo up to it, and the picture would gyrate in time with the music. That was fun, we could make some really pretty stuff. Then the guy I worked for, caught us, and we got a lonnnnnggggg lecture, "that expensive equipment is not to be used for music". So that was that.
Somewhere I have pictures of this.
Jane