06-23-09: MapmanThat seems to be the conventional wisdom, but I don't buy it. I learned long ago from cutting an Archies single from the back of a cereal box and then playing it (it had the plastic groove laminated onto the cardboard, and had a marker for where to punch the hole) that as long as the groove is articulate and well-mastered, the record can sound good. I fully expected the fidelity of that Archie's record to sound like crap. Boy was I surprised. It sounded pretty much as good as a commercial record.
Wasn't RCA's move to Dynaflex the event that signaled the downfall of vinyl back in the day?
Anyway, I bought LPs back in the days when RCA went to Dynaflex. I was a Buddy Rich fan (still am), and this happened when he was on RCA. Some of his records of the '70s were released on Dynaflex and they sounded fine. These days I get a lot of vinyl from thrift shops, and I have some RCA classical boxed sets in Dynaflex that are re-releases of Living Stereo recordings. They sound fine.
Two things: 1) I found that a record grip or clamp makes a thin record sound pretty much like a thick one--it takes the resonance difference out of the equation.
2) A thinner record does the same thing to VTA as raising the tonearm, which would increase the initial attack and thin out the body of the sound. So with my Technics' easily adjustable VTA, I found that any Dynaflexes that needed VTA compensation would then sound pretty much the same as a thick record.
Besides, if there's a vinyl shortage, I'd rather have a thin pressing on virgin vinyl than a thick one on recycled.