Dallas Hinton:

> The pop record is a flat vinyl disk containing spiral grooves
> which a mechanical arm ("needle") follows to convert the
> movements from analogue to audible (via an amplifier of some
> sort).

Does not the same hold true of a rock record or a jazz record?
Do you remember Bull Moose Jackson's ribald:

   Then she starts to craving for my big ten-inch...
   Record of the band that play the blues!

The disk can also be made of shellac, which, although noisier, has
its advantages.

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