I've processed the files and I'll get some pictures up tomorrow.
Anybody who wants the software is welcome to it, but I don't want to get into too much handholding and there are absolutely no guarantees...
I think your turntable may be running at 33.1rpm rather than 33.3...
Paul
The Clearaudio test disc recording is clipped and distorted. I've not seriously pursued it yet.
Reverting to the Ultimate Analogue, this is the tone itself,
I think the wide multiple peak may be characteristic of this recording, it's certainly something to look into.
This is the wow spectrum,
The peak against the y axis is record eccentricity. The interesting peak at 2.74Hz, or 164rpm, is that the motor?
This is the polar plot, this shows speed irregularities that are regular with the platter rotation, so presumably generated by the mechanics of the drive.
I think this is better than the equivalent pre-repair plot but there is still evidence of a dent in the idler.
Paul
I wonder if the jaggediness is the notorious suspension wobble?
I think in a smooth deviation from roundness. The right half looks good, the left half has a corner in it.And how does the disc eccentricity manifest itself on this plot?
The right channel of Andrew's recording is much less jaggedy than the left. So it's more likely that the recording has a problem.Sondek was right, he will be pleased! lol.
The right channel of Andrew's recording is much less jaggedy than the left. So it's more likely that the recording has a problem.
Sonddek is clearly wrong in his concept of dynamic wow, but there are other interesting factors.
Paul
Sonddek is clearly wrong in his concept of dynamic wow,
Paul
I think in a smooth deviation from roundness. The right half looks good, the left half has a corner in it.
If the reduction between the platter and the motor is 5:1 then I think we're also seeing eccentricity in the motor shaft.
It's worth remembering that being able to see things doesn't mean a fault, or 'badness'...
I'll upload the current state along with a readme. What I can't do is too much handholding, these are very much 'What if?' tools rather than production software.
Paul