I have been using delay and reverberation since the middle 1960s. I use them to make what is almost inaudible to the ear, audible. I do not use them to play loudly but to make the higher harmonics heard. ↗
I always laugh at these rock n'rollers where you can't understand them. Mind you, it's not because they're inaudible or indistinguishable; it's because they're too obscure. ↗
Inaudible prayers, particularly of the Canon, which at first don't seem to have anything to do with music, end up being a very important part of the aesthetic of the traditional structure of the Mass. ↗