Keeping to the context of this thread i.e. being able to run any/most filter/modulator combinations at DSD512, this is what @jussi_laako has said … Which HQP Filter are you using? [2023] - #629 by jussi_laako
Here is a user report of top of the line M2 Ultra (> 6 P cores) testing various combinations at DSD512 … HQ Player - Page 1151 - Software - Audiophile Style
Depends on what filters/modulators you want to run at DSD512 - but there are a lot of constraints and limits, even with the M2 Ultra.