G'day
On Wednesday night I tried muting the sound in TokBox and running our voice channels through the Mumble server that one of my players rents. We had to wear headphones because Mumble has no echo cancellation, but apart from that results were excellent. Lag was not perceptible, so we had far less trouble with people starting to speak at the same time and then both stopping. Sound quality was as perfect as far as I could tell. And we didn't have Google+ periodically asking whether we were still there and disconnecting the tardy.
One player rather frivolously asks for Roll20 to offer an option of broadcasting video but no voice. I will slap him with a trout at the next opportunity.
Can anyone tell me how Mumble is likely to do on intercontinental calls?