I think the key to an aluminum TT platter is to properly damp the aluminum to reduce resonance. This is often done within the platter and/or on top of the platter as in the case of SME. Mass does matter depending on the drive system and what problem the designer is attempting to solve.
Regarding the whole belt vs. DD discussion here, I agree with Dan ed, though this is far too complex a topic to discuss on this thread and I think we should stay away from gross generalizations regarding TT drive systems. It's how its implemented that counts.
Regarding the whole belt vs. DD discussion here, I agree with Dan ed, though this is far too complex a topic to discuss on this thread and I think we should stay away from gross generalizations regarding TT drive systems. It's how its implemented that counts.