Hi, this might not be a particularly helpful response, but all of my DSD files are DSF, I’ve converted them from DFF where necessary. It’s a while since I loaded my DSD files but I can only assume it’s because it’s the only format that worked for me.
I assume you’re aware but there is free software available to easily convert from DFF to DSF - I use DFF2DSF.app and it works fine.
Btw, I’m also using Melco (N1Z/1) into Bridge 2, using MConnectHD on iPad, including Tidal streaming, and it all work like a dream!
Regards, Mike.