tags: audio mus-407 digital-audio delay

Reverb

Reverb, or reverberation, is a [fixed delay effect] where many delay lines work together to simulate reflections of a sound source in order to simulate room/hall acoustics.

• numerous reverb [algorithms] in existence
• usually, a large combination of [feedback] delays with different short/medium delay times, in parallel and series

Delay times usually do not vary dynamically

• because room dimensions do not vary dynamically!
• variable delay times can be used for doppler effect and other weird, custom reverb-like effects

Many reverb algorithms are variations on the Schroeder Reverb design:

• 4 summed [comb filters] in parallel, through two [all-pass filters] in series
• comb filters provide reverb "body"
  • delay lines with [feedback]
• [all-pass filters] introduce [frequency]-specific [phase] shifts to diffuse the sound and reduce [resonance]