Mark,

Sorry for taking so long to respond - I've been off on holiday again. But it's back to the grindstone again now - sigh!

Did Shawn's suggestion help at all? I'm assuming that you're only experiencing these terrible ping timings when you're busy playing back music - is this right?

The other thing you could try is to change the send-method setting to "broadcast" and ensure that the broadcast-address is correct for your network. This should allow you to synchronise playback, provided that the players are on the same sub-network.

Please let me know how it goes.

Cheers
Paul