Merging doesnt use ROCK stock. They have a custom RoonOS build on the NADAC+PLAYER. It’s similar to ROCK, as ROCK is also RoonOS, but I want to clarify that it is indeed special and they do have permission to do this.
Theoretically, this can work, but we don’t have a good way to turn on/ship the RAVENNA drivers. You will probably need to run Ubuntu or something until we solve this.