The Delays group allows control of delay timings for the reverb. When changes are made to any control in the Delays group, the IR waveform is recalculated and displayed in the Waveform display.Adjusts length of the Pre Delay from –200 to +200 ms. The Pre Delay is the time between the direct sound and the first reflection. Increasing the Pre Delay often changes the perceived clarity of audio such as vocals. Pre Delay adjusts the delay of the overall impulse and affects both the Early and Late portions of the IR equally.Pre Delay can be set to negative values to allow for subtle or radical changes to the reverb. For example, a small negative Pre Delay setting can be used to eliminate the early portion of an IR. A large negative Pre Delay setting lets you use the very end of a reverb tail for creative sounds not possible with standard reverbs.Adjusts length of the Late Delay from zero to +200 ms. The Late Delay is the time between the Early Reflections and the Late Reflections or tail of the reverb.Increasing the Late Delay control from zero allows the reverb tail to be delayed so that it does not start immediately after the early portion of the IR. As Late Delay is increased, the reverb tail starts later in time and makes the reverb space sound larger. Large amounts of late delay can be used to achieve creative effects not possible with standard reverbs.In quad and 5.0 channel output modes, adjusts length of the Front, Rear, and Center Delays independently from zero to +200 ms.