Ketchup,
As Dgarretson said, transient-induced speed variations are unlikely to be visible with a strobe. Our strobe wouldn't pick up most of them, though it's more resolving than the KAB (Paul built it in a CAD program). We're talking about time shifts lasting only as long as a single beat.
MarkD51,
For better or worse, we don't have to listen intently or "try" to hear this. We just do. We don't find this sensitivity diminishes our enjoyment of music played well. I believe it may enhance it. We have thousands of LP's we enjoy hearing repeatedly, though I admit we've heard many othes we'd gladly use for driveway resurfacing material. ;-)
BTW, a heavier platter does not eliminate speed variations from stylus drag. Newton forbade that when he discovered the laws of motion. All else being equal, a platter with higher rotational inertia lowers the frequency and reduces the amplitude of speed shifts. But it can't eliminate them.
Whether they're audible is up to the ears doing the listening. We hear them despite our 35 lb. platter if something's not right, or when testing an inferior belt material. The improvements we described and others confirmed on the "Upgrade for 1/2" mylar belt" thread demonstrate this beyond any doubt. Most users on that thread have heavy platters, but they have no difficulty hearing differences in speed stability made by a belt change.
As Dgarretson said, transient-induced speed variations are unlikely to be visible with a strobe. Our strobe wouldn't pick up most of them, though it's more resolving than the KAB (Paul built it in a CAD program). We're talking about time shifts lasting only as long as a single beat.
MarkD51,
For better or worse, we don't have to listen intently or "try" to hear this. We just do. We don't find this sensitivity diminishes our enjoyment of music played well. I believe it may enhance it. We have thousands of LP's we enjoy hearing repeatedly, though I admit we've heard many othes we'd gladly use for driveway resurfacing material. ;-)
BTW, a heavier platter does not eliminate speed variations from stylus drag. Newton forbade that when he discovered the laws of motion. All else being equal, a platter with higher rotational inertia lowers the frequency and reduces the amplitude of speed shifts. But it can't eliminate them.
Whether they're audible is up to the ears doing the listening. We hear them despite our 35 lb. platter if something's not right, or when testing an inferior belt material. The improvements we described and others confirmed on the "Upgrade for 1/2" mylar belt" thread demonstrate this beyond any doubt. Most users on that thread have heavy platters, but they have no difficulty hearing differences in speed stability made by a belt change.
