Altiverb surround channels crackling?

Anyone experienced this? I'm working on a very dense 5.1 mix, bought Altiverb to use as a 5.1 reverb, and unfortunately the rear speakers have an obnoxious crackling in them. I've tried soloing only the tracks that are running to this reverb, which cuts the system performance meter to about 70%, well below peaking, have set the buffer to 1024 samples, etc., but this thing won't stop popping and sputtering. Anybody have any advice?

Wayne Henderson wrote:
.. I want to add some music to the surround channels, .. but isn't there an easier way?
No.
5.1 etc is supported only by the professional tools as FC/pro, Logic etc. ... -

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