Convolution Reverb
Definition
A reverb processor that uses impulse responses (IRs) — recordings of real acoustic spaces or hardware reverb units — to mathematically recreate their acoustic signature. Produces highly realistic reverberation because it is based on measurements of actual spaces.
In Simple Terms
A reverb that uses a recording of a real space — a concert hall, a church, a studio — to recreate that exact acoustic environment digitally. If you want your vocals to sound like they were sung in Abbey Road, this is how.
In Practice
A convolution reverb loaded with an impulse response of the Concertgebouw in Amsterdam places a string quartet in one of the world's most celebrated concert hall acoustics with convincing realism.
Common Confusion
Convolution reverb is CPU-intensive and not easily tweaked in real time. Algorithmic reverbs are more flexible and CPU-efficient but less photorealistic. Neither is inherently better — they serve different creative purposes.