RK,
"Look at the raw trace for the WE8000.
Start at the first lower min freq, just above 3130 hz. Other than the max at around 3164hz, count every sharp change in direction until immediately before the next min of around 3130 hz again.
I count 14. The platter changes speed 14 times during that single revolution."
A tone is a vibration, a sine wave, not a straight line on a scope. You have to compare to a "pure" tone generated for 3150Hz.
Regards,
"Look at the raw trace for the WE8000.
Start at the first lower min freq, just above 3130 hz. Other than the max at around 3164hz, count every sharp change in direction until immediately before the next min of around 3130 hz again.
I count 14. The platter changes speed 14 times during that single revolution."
A tone is a vibration, a sine wave, not a straight line on a scope. You have to compare to a "pure" tone generated for 3150Hz.
Regards,