SIR1

For starters, it's worth considering what a convolution reverb is (and my review was too short, so I need to pad it a little). Convolution reverbs use impulses usually collected from natural spaces by people popping balloons or using other meants to get a basic example of how the space affects sounds. Then the reverb unit emulates the behavior of the natural space by filtering/damping the sound consistent with the response pattern of the reverberation of the natural space. Convolution reverb is the next step in reverb for those interested in rich, natural sounds.

In my opinion, SIR is the undisputed king of free reverb effects, and I've tried quite a few. There's nothing else in the same class as SIR. The sound is gorgeous, natural, and very morphable in a hurry. One can find dozens of free impulses online to enhance choices. Because most commercial convolution reverbs are quite expensive, this free version is all the more impressive. I've had minor stability issues and it doesn't work for live recording because it has too much latency, so it's not perfect, but it is outstanding for a free product.Read Review