DougMac
Super Member
Early acoustics are all over the map regarding speed. Some companies, such as Pathe, went with a different speed as standard. Pathe and Edison chose 80rpm.Because 78s are not always recorded at that exact speed so you need to adjust to it. In other words, 78rpm is not at the zero pitch position but somewhere else on the pitch scale. It has nothing to do with this turntable speed stability and w/f.
There are many 78 enthusiasts who strive to do speed correction. Their efforts are complicated by the fact you often can't tell the key selected for the performance. Also standard concert tuning (A440) wasn't codified until after many of the early recordings were made. Thank goodness there were a few recordings that started with a pitch to help purchasers set their gramophones to the right speed. I correct to a known speed or when I feel something other than 78 is correct or sounds better, but I don't obsess.
I'm glad turntables that play 78's are still available. I've got over 3,000 and love to listen to them.

