Thanks @rick_n Yes the volume is set, and I was unable to AirPlay to the DAC or N100, likely because of how my router and switch are set up to run the whole house WiFi system.
TMR support was unable to fix it (I tried everything they suggested anyway) so the N100 is going back.
Shame because it is built like a tank. At some point I'll revisit the Streamer and DAC combo.

