Thanks for that, and for the link. I recalled playing long ago with a software that used convolution to let a user choose from different 'reverb spaces' (e.g. T

Thanks for that, and for the link. I recalled playing long ago with a software that used convolution to let a user choose from different 'reverb spaces' (e.g. Taj Mahal) to put audio into. It occured to me that in many/most cases the audio from the source arrives first. So -in some cases- multiple models of the 'verb space' could be constructed/refined to allow filtering. Probably much easier for a lone speaker in a small, geometrically simple room -without- a P.A. Maybe not so easy for a speaker using a P.A. in a cathedral. But the Power of Fourier is mighty.