How to get native DSD from ROCK to Mytek Brooklyn

Dear all,

I’ve just installed the latest version of ROCK (Version 1.3 build 276 stable) on a NUC7i5. I’m connecting to a Mytek Brooklyn DAC+ with the default USB cable which came with the Brooklyn. Unfortunately in device setup I get…
… bitperfect support DSD128 max
… no native connection only DoP, PCM and dCS method

playing a DSD256 file results a DSD128 playback on the Brooklyn using DoP. Using dCS is a very quiet, very noisy output not even recognized as a DSD stream by the DAC+ (which shows 24 bit / 352.8 kHz on the display)

Do I miss some additional configuration?

Cheers

P.S. Installing Windows 10 on the same NUC and using Mytek’s ASIO driver works flawlessly with DSD256 native.