Sueiro Bal Marcos wrote:
> The standard way to identify the base material of a lacquer disc is
> the disc's center hole where silver metal (from an aluminum base),
> cardboard will be visible.
I've mentioned it here earlier, but glass base AudioDiscs had a 2-inch
fibre center inside a glass base with a 2-inch hole. Therefore if you
look at the four holes you will see orange-brown fibre (like cardboard),
not glass. And to make it more confusing, sometimes there will be gray
coating the center hole from the rubbing of the fibre center hole
against the center spindle. You (or was it Mike Casey) have also
forgotten to mention the use of steel as a metal base during WW II.
> These bases also have distinctive sounds when the disc is struck
> its edge using an object such as a ring. An aluminum base yields a
> has been described as a "pong" while the glass sound is more of a
Or "CRACK". Followed by the sound of swearing.
> Cardboard will, of course, have no sound.
> Casey, Mike. "FACET, The Field Audio Collection Evaluation Tool:
> and Preservation Problems, Version 1.0". Bloomington: Indiana
> Marcos Sueiro Bal
If a cardboard disc falls in a forest and there is nobody there to hear
it, does it make a sound?
Mike Biel [log in to unmask]