I am intrigued. I have been using a VDA.2 DAC since it first became available.
Looking at the photo of the DMC-1 prototype, it appears that you are using a Raspberry Pi 3 B+ board? Will there be any access to the HDMI port for connecting a small touch screen? It looks like that port is blocked by the casework.
I am curious as to what OS will be running on this device - Volumio?
Is the analog output going to be similar to the VDA.2: that is two sets of analog outputs, 180 degrees phasing, so that balanced cables can be used?
Will it be possible to run LMS/Squeezelite on this device?
Will there be an antenna port on the back for WiFi?
Of course, I am curious as to what DAC chip is going to be used?
I apologize for all the questions; as it might be premature to do this.