Connection for Surround Sound, Multiple Inputs?

[alandbush]

You can also use multiple AD converters and use the analog outputs on the receiver/preamp.

Similar to how I utilise my four Phantoms but with a miniDSP for channel routing/mixing and EQ.
Centre channel is mixed into the left and right and LFE into left and right front/rears.
The miniDSP has one optical output to a Phantom which is added, via Spark, to the queue of "roomA", I.e. Front pair.
The rear channels are output as analog and converted to optical via a small cheap converter to another Phantom which is added to the queue of "roomB", I.e. Rear pair.
Channel trim and delays applied either in processor or miniDSP.