Also saw the Mag-Lev at an audio show, three years ago for me. The turntable was running, but visitors could only listen via a headphone. Not familiar with the LP it was playing. Seeing it running was impressive, though.
Expecting that the demo used a good LP, arm, cartridge, headphone and amp, and was set-up properly, I was very sad it didn't sound right. The music sounded muffled, and also lacking in the high frequencies. That LP was the only one available for listening. I listened only for a very short time.
Looking at the platter floating and rotating by magnetic energy, I could see that the platter was going very slightly side-to-side. I wonder what other rigid body vibration modes are present in this floating platter and how these are controlled. I especially wondered about the modes from the radially-inward-moving, eccentric, downward force applied by the arm on basically a magnetically suspended flywheel.
Expecting that the demo used a good LP, arm, cartridge, headphone and amp, and was set-up properly, I was very sad it didn't sound right. The music sounded muffled, and also lacking in the high frequencies. That LP was the only one available for listening. I listened only for a very short time.
Looking at the platter floating and rotating by magnetic energy, I could see that the platter was going very slightly side-to-side. I wonder what other rigid body vibration modes are present in this floating platter and how these are controlled. I especially wondered about the modes from the radially-inward-moving, eccentric, downward force applied by the arm on basically a magnetically suspended flywheel.