Since there are a number of Lumin + MSB DAC users, it may be useful to report that a user upgraded his DAC successfully using the following Lumin settings:

In Lumin app:
- Turn off Volume Control
- Turn off Re-sampling
- Turn off repeat
- Turn off shuffle
- Clear playlist
- Add the DAC upgrade WAV file to current playlist and play it

The user got it to work via AES - I assume the same would be true for coax. (For these types of connections, remember to disconnect USB between Lumin and the DAC.)

If any other user got it to work via USB, please share your experience.