Hi - Looking for videoconference technology that would support: - a conference with a single host and up to, say, 120 participants - only the host needs to have their video image distributed - the audio from the host and all participants must be mixed and distributed to all with good synchronization with respect to the host video and minimal delay - on occasion, the host might mute the other participants, but normally all would be on. - ideally, the sound mixing could happen in smaller sub-groups (perhaps up to 12, but at least 8 (bass, baritone, tenor 2, tenor 1, alto 2, alto 1, soprano2, soprano 1) so that the audio delivered to a particular subgroup could be either the "hall" experience (what the conductor hears) or with the subgroup boosted to reflect what the participant would hear in a physical rehearsal. Is there anything out there? Randy