User Guide Full Reverb Effect HELP

If a reverberation has too many reflections in it, they all coalesce, and it doesn't sound as though it came from a 'real' room any more. In real rooms reverberation has a sound of its own that is actually determined by the closest reflecting surfaces to the source of sound - these are called 'early reflections' and they give a reverberation its character. These also determine to an extent what happens with the more diffuse reflections - the actual reverberation, if you like - and if those don't match the character of the early reflections, it simply sounds unnatural. So for instance, if you had a small room reverberation set, but increase the perception value, there's going to be an acoustic mismatch, and that's what doesn't sound natural.