Warbling on horns, piano and vocals

I'm thinking it could be that the turntable is on a wall shelf and it's vibrating because it's sitting on something that's not massive enough. I'll test it today sitting on the hearth.

Only affecting one arm and not the other?

To understand if there is a low frequency resonance of the system:

• If we knew whether the cartridges were high, medium, or low compliance would help.
• And also the effective mass of the other arm, and whether the effective mass of the CB-L is correct at 19gm.

Some ‘reflected’ high frequency resonance in the arm:
I am unsure how one would get a low frequency warble, but some IMD of a high frequency resonance might be possible.

This is getting well beyond me, and hence the suggestion to reach out to Frank.

It can be turntable mechanics conditions issue - motor, idler or springs.

No, both arms- just in a different way.

I just put it on the hearth and the warble in one and the distortion in the other are gone. And now I've returned it to the wall shelf without the discs under the fat spikes so the spikes go right into the wood of the shelf and I lowered the spikes to their lowest level to reduce any play in the shel. It's about 60% better but still warbling and the other arm is distorting again. Or mistracking or whatever it actually is.

This table may be going away until we move in a couple years to somewhere I can fit a proper massive stand.

No, both arms- just in a different way.

ahh…

That makes much more sense now.

Do you have say a CD player?

If that is playing, and you lay the hands upon the hearth or shelf, can you feel it jumping to the beat?

No, no jumping to the beat in either place.