Electronic reverberation enhancement suits amplified venues better than pure acoustic ones.

Evidence

Finally, it is possible to modify the reverberation electronically, and several proprietary systems have been developed to do this. Again, they can be quite effective when carefully used. But they tend to be more applicable to venues that already use some form of sound reinforcement rather than pure acoustic performances. — David M. Howard, Jamie Angus, Acoustics and Psychoacoustics, 1922

Categorization

• QUESTION: What are these proprietary systems, and how do they actually synthesize reverberation in real time?