I have a Meitner MA-1 on my desk right now.
DSD bitstreaming works great for me using the following settings:
1) Options > Audio > Output mode > WASAPI - Event Style (also select the MA-1 in Ouptut mode settings...)
2) Options > Video > Bitstreaming > Custom > Check only 'DSD over PCM (DoP)'
3) On the same dialog, pick DoP Format of 'dCS, Meitner, etc. (0xAA)'
It's possible a newer Meitner firmware will support the new DoP 1.0 marker, but the one on my desk requires 'dCS, Meitner, etc. (0xAA)'.