[BC] the old ETs

[Barry Mishkind]

Bingo!

Thanks, Mark, that is exactly the explanation I couldn't 
remember.  Guess I wasn't quite old enough to have done that enough 
times. <ggg>

At 03:01 PM 9/24/2008, Mark Durenberger, wrote
>Yes, it had to do with the then-lack of "diameter equalization".
>
>As you approached the center of the disc from the outside and groove 
>velocity changed, there was a gradual loss of high-end 
>response.  ETs intended to be played back-to-back would have one of 
>each pair recorded from the inside out so that the audio sounded the 
>same when you made the switch from one ET to the other.