I don't understand these comments at all. All carts sing. If they are not singing, they are not moving to the grove. They literally move at the speed and frequency of the music so that tiny little arm becomes a speaker. It might be the worlds worst, but it is none the less. If your platter is stopping that, then it must be damping the vinyl that is then getting pushed by the styli... What you want is a platter coupled with the record so that the record itself is not resonating, which likely dampens the dynamics etc, but might create a false openness to it. The interaction between the record and platter is paramount and matters more than almost anything else. They probably used felt to damp the susceptible resonances of a light platter. Creating the coupling cannot be done really without a force of some kind like a weight. Even the best cut ones for putting the vinyl on top without a weight deal with uneven vinyl and are too slick typically to create the coupling. Without any compliance like with a Garrard mat (stiff rubber) too slick and hard of a surface will create bounce as oppose to coupling.
