Thank you Axel for the great explanation. I found out about 78 rpm metallic masters from the NY Times article this past Sunday. Paramount Records in Wis. evidentley used these back in the 20's and 30's for their Blues artists. They have never found these original metal masters, some saying they were melted down for the war effort, others thinking disgruntled workers threw them into an adjascent river after the factories closing (divers have even scoured the bottom of the riverbed looking for them)
Check out the article (there is a link posted on the music threads)
Check out the article (there is a link posted on the music threads)