Right. Connect optical from the Samsung and 7.1 analog from the Samsung. The 7.1 Direct input is separate from the other video inputs (selected using the "7.1D" button on the 990's remote) and will use the multichannel analog input, and then you can set up another input for optical 2 or whatever source you want. If you go back to using the 990's DVI switching, you can even assign the same DVI port to both of those inputs (assuming you don't use CD or AUX for the optical 2 connection, as those two are audio inputs and thus don't support video switching).