I need some suggestions on a particular sound cue trigger device. What I'm looking for would allow two audience members to remotely trigger a "correct" and "incorrect" sound effect much like a game show. It would need to operate like Instant Replay so that the audience members can control the action onstage. The closest I've seen to something that could work is a pair of those Midi doorbells that you can download MP3s onto. Then, just set them side by side next to an open mic in the control booth so they can play through the main system. However, I don't know what kind of lag time they may have, or if the signals would interfere with each other, etc. Anyone have any ideas? Thanks in advance!