Convolution Reverb

Definition

Convolution reverb is a type of reverb processor that uses recorded impulse responses to recreate the acoustic characteristics of real spaces. Unlike algorithmic reverbs that calculate reverb mathematically, convolution reverbs "convolve" your audio with a captured space.

How It Works

1. An impulse response (IR) is captured from a real space
2. The IR contains all reflection and decay information
3. Your audio is mathematically combined with the IR
4. Result: your audio sounds like it was recorded in that space

Advantages

• Extremely realistic results
• Can recreate specific famous spaces
• Captures characteristics impossible to model algorithmically
• Consistent, repeatable results

Limitations

• Less real-time flexibility
• Can't easily change size or decay
• Higher CPU usage
• "Static" sound compared to algorithmic options

vs. Algorithmic Reverb

Convolution: More realistic, less flexible
Algorithmic: More creative control, sometimes less realistic

Related Terms

• Impulse Response
• Algorithm
• IR