"In January 1949, ""micro-groove"" records, on vinyl, were put on the market in the USA by RCA and Columbia. What was the main difference between them?"
RCA's played at 45 rpm and Columbia's at 33.3 rpm
rca s played at 45 rpm and columbia s at 33 3 rpm
rca s played at 45 rpm and columbia s at 33 3 rpm
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RCA's played at 45 rpm and Columbia's at 33.3 rpm