Setup 1: Roon core running on Mac Mini; endpoint is ultraRendu; DAC is Ayre QB-9 DSD.
Setup 2: Roon bridge running on iMac; endpoint & DAC is Ayre QX-5.
Roon core speeds through tracks with no audio in Setup 1 regardless of file. Roon bridge plays normally in Setup 2.
Both setups are on Google MESH network.