Retep,

I re-read your post and I find it very interesting. Does the Airport Express output a digital audio signal via the USB to your 990 or are you using Apples special toslink connection? Are you wirelessly streaming from a laptop/MacBook to the Airport Express?
_________________________
AvFan
Outlaw 976 | ATI 2005 | M&K 850s Left, Center & Right, Surround-55s, MX-70B Sub | Harmony 950 remote | Panamax 5100 | OPPO UDP-203 | LG OLED55B7