A LUG member was kind enough to post the technique of dropping an audio file of a room (hit and respective echo in a .wav or .aiff, etc. file) directly onto the Space Designer window to instantly create a usable impulse. Great trick! However.... It only works some of the time. Often, the little blue outline around the window doesn't show up and nothing happens. Other times for no reason, it works perfectly. Is there some consistent way of getting this to work? Only AIFF files? 44.1k vs. 48k? Any ideas here? James Ryan