On Tue, Apr 06, 2021 at 01:00:53PM -0700, Yuri wrote: It sounds like what you're looking for is a "convolution reverb", if you want to get the exact sound of a space, or just any reverb plugin if you're not too fussed. Normal digital reverbs use combinations of different sized delays to provide a dense "wash" of sound. By twatting about with the phase through allpass filters and having combinations of very long and very short delays that don't sync up - at least one has to be modulated to stop it sounding "pingy", you can get a very realistic reverb effect. Convolution reverbs effectively multiply each individual sample of the incoming audio with every individual sample of an "impulse" which is a recording of a loud bang in a reverberant space. So, for each input sample you've got an output a few seconds long. One single pulse - just a one-sample click - would play out the impulse, and a sustained sound would sound like it was being played in that space. There are tricks to make it less insanely computationally expensive, but that's basically the size of it. Now even if you don't have exactly the answer, you've got the right words to put into Google :-) -- Gordonjcp