How Accurate Do 33⅓ and 45 RPM Speeds Need to Be?

Turntable specs often list speed accuracy to three decimal places, and forums are full of debates about fractional percentages. But when you’re actually listening to records, the real question is simpler: How accurate do 33⅓ and 45 RPM speeds really need to be? The answer lies at the intersection of physics, human hearing, and musical