Hey ...russ,
Actually, check out the code in AudioSubscriber for when you set
publisherIDs. It's actually smarter than I'd guessed (go Basu!) - what it
does is immediately take the publisherIDs Array and turn it into a
"whitelist" (_publisherIDTable[pubID]=true) of streams it's allowed to play.
When it comes time to play all streams, it just goes through the entire set
of audio streams in the room, and checks each against _publisherIDTable to
see if there's a true for that pubID. Duplicate entries shouldn't matter,
and nor should nulls. You should be good to go.
nigel