The recent discussion of cutting lathes and turntable playback got me thinking (always dangerous).
It is possible that any speed instability in the cutting lathe might be shown or hidden by the turntable during playback if certain conditions are met.
1. Lathe: slight speed increase/Turntable: slight speed decrease AT THE SAME PLACE ON THE RECORD
may result in no perceived speed instability, as each error offsets the other
2. Lathe: slight speed increase/Turntable: slight speed increase AT THE SAME PLACE ON THE RECORD may result in increased speed error and be more easily perceived.
Therefore, it's conceivable to understand how a record might sound different on subsequent plays on the same turntable, depending on when you cued the stylus down and where in the "cycle" of the turntable speed instability you end up.
Thoughts?
Lee
It is possible that any speed instability in the cutting lathe might be shown or hidden by the turntable during playback if certain conditions are met.
1. Lathe: slight speed increase/Turntable: slight speed decrease AT THE SAME PLACE ON THE RECORD
may result in no perceived speed instability, as each error offsets the other
2. Lathe: slight speed increase/Turntable: slight speed increase AT THE SAME PLACE ON THE RECORD may result in increased speed error and be more easily perceived.
Therefore, it's conceivable to understand how a record might sound different on subsequent plays on the same turntable, depending on when you cued the stylus down and where in the "cycle" of the turntable speed instability you end up.
Thoughts?
Lee