[asterisk-users] Which is more efficient for 1 to many broadcasting?

[James Sharp]

Putting a whole bunch of people into a listen-only/muted Confbridge 
conference or getting the broadcaster audio into a MOH class and then 
just having callers attach to that MOH class?

Does the the muted side of a Confbridge Room still try to mix in audio 
from the muted channels or does it just disregard those channels and 
only run mixes against unmuted channels?

Now, if the answer is "MOH is more efficient", can someone suggest a way 
for a channel to be the source of a MOH class?