Sound from Airport Express USB is not possible. The AE headphone jack is also a Mini-TosLink out just use a mini adapter to full Toslink.
Paradisea, Airport Express and Denon 2910
Is it possible to connect a Paradisea to the USB port of an Airport Express? If I remember correctly, the USB connection on the Airport was designed for printer sharing. Has anyone successfully used it as an alternative to the headphone jack?
Also, would the Paradisea offer an improvement to a Denon 2910?
Also, would the Paradisea offer an improvement to a Denon 2910?