The Reverb Diffusion property controls the echo density in the reverberation decay. The default 1.0f provides the highest density. Reducing diffusion gives the reverberation a more "grainy" character that is especially noticeable with percussive sound sources. If you set a diffusion value of 0.0f, the later reverberation sounds like a succession of distinct echoes. Range [0.0f .. 1.0f] Default: 1.0f