Originally Posted by Xenakios

"True stereo" impulse responses have 2 x stereo files. (A stereo IR for both the left and the right channels of the input.)

ReaVerb doesn't load quad files directly but maybe some routing magic in Reaper could be done to enable a passable solution. (If the IR files are 2 separate wav etc files instead of being in quad or some proprietary format.)

Originally Posted by Justin

It would still use more CPU than a single ReaVerb instance, although probably less than 2 ReaVerb instances uses now.. I'll look at updating it for that at some point.