I guess the DAC will not be UNLOCKED unless it is playing (ie receiving a file stream)
In your first post you say that the DAC worked with LMS. How did you connect this? With the microRendu in Squeezelite mode? Can you make this work again?
Can you explain why we see Combo384 ASIO “Connected to this PC” and as a Networked Airplay device at the same time? Do you own more than one device with the Amanero card?
Othervwice everything seems OK at the microRendu. There is not much more I can do as I do not have your DAC here.
Back to @john…