Weird, but true, to my ears at least! I am not using my i-book, airport express, Quad CDP99 and it sounds great. I bought the airport express primarily to move away from using cables so had no expectations sonically and my jaw dropped when i first plugged it in and started listening - far more detail. FYI I was using the MAudio as a digital through, ie digital out of MAudio to digial in on my Quad. The funny thing is that I was using a co-ax connection with the MAudio and Airport Express uses an optical input to the Quad and optical is meant to be an inferior connection type. Anyway i am sitting on my sofa, with no wires, typing this and selecting what music I want to listen to; bliss! ......and not a CD case in sight! Dominic