Alesis QuadraSynth Plus manual Density, Diffusion

Editing Effects: Chapter 7

Reverb (Page 4)

Density

Density controls how the first reflection of the reverb effect will appear. When set to 0, the first reflection is heard alone without any other reflections. When set to 99, the first reflection appears to “fade-in” and then “fade-out”. This is because a number of reflections will occur just before and just after the first reflection, in addition to the remaining reflections heard after the first reflection. Thus, the reverb sounds more “dense”.

If the select Reverb type is Large, the Density parameter is unavailable.

Diffusion

Diffusion determines the “thickness” of the reverb sound by adding more reflections to the reverb’s decay. With lower diffusion settings, you may be able to actually hear the individual echoes that make up the overall reverb sound. With higher diffusion settings, the echoes increase in number and blend together, washing out the reverb’s decay. Greater diffusion works better with percussive sounds, whereas less amounts of diffusion work well with vocals and other sustained sounds.

Note: The illustration above reflects a Density setting of 0.

QuadraSynth Plus Piano Reference Manual 151