I&#x27;ve thought about this problem before, and came to a different (though perhaps inferior) solution.<p>Why not broadcast the material via wifi directly to the audience&#x27;s devices, and have audience listening with headphones?  What if audience member doesn&#x27;t own a device?  There would be spare devices at box office that would be provided &#x2F; rented.  It would certainly change the ambiance of the performance since the acoustics of the venue wouldn&#x27;t be heard, but it wouldn&#x27;t prevent people from (for example) hearing the laughter of the crowd around them.<p>I think if the app was designed right, it could possibly stop people from recording.  Not that it would technically be possible to prevent people from recording, but since you control the stream of data to the device you can embed &quot;watermarks&quot; in real time during the performance.  So if someone did try to record it would be theoretically possible to trace back to precisely which user &#x2F; device was responsible for leaking the performance.<p>EDIT:  On second thought, perhaps it would be safe enough to allow the user to retain a copy (with watermarks included), accessible via the app they used to listen to the performance live.