It was only that I have a bit of an interest in HiFi that I knew about the Squeezebox Duet and realised the mistake that the OP must have made.
So Duet HiFi as opposed to Duet WiFi 🙂
Edit. Actually it gets worse 'cos the Squeezebox Duet is also WiFi so it's "Duet HIFi WiFi" 🙂
Wonder if it can play gcode files in 5.1 surround sound ?…........