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This Day in Rock History - Mar. 31st

1949: While rock ‘n’ roll was still a few years away, a development crucial to its success takes place on this day.

RCA Victor introduces the 45 rpm “single.” The disc is said to give greater fidelity than the then-standard 78 rpm discs. Not to mention, “45’s” are smaller and lighter.

The format catches on quickly and 78’s soon become an outdated relic.