Hi kscharf,
I don't know about the usb on the 990...
but I know the 1070 doesn't have one...
I pass all audio via spdif optical....mp3's...wav...wma....AAC
it's all good....
I do beleive you can do this with the 990...and it's usb input...
or is that the 2150 ?
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Outlaw 1070-Mirage M-290(main)+MCC(center)+Omnisat Micro(sides) nanosat(back)+ +PS12-90(sub)-Technics SL-5 turtable+Cambridge Audio 540P-HTPC - SamsungDTB-H260F HDTV tuner - Optoma HD 20 +100' Draper screen -lots of spaghetti and toys