Based on the delay time between the source sound and its delayed image we can fool
the brain into creating images that aren't really present.
The example
below first has the sound source coming from the left monitor. This sound is also routed
out, via an aux channel, to the left monitor.
The next example now delays the right side by 20 msec. Notice how the
image shifts to the sound coming from the left hand side. The image also appears fuller
wider then the image produced without the delay. A delay below 30 msec is known as the
Haas Effect.
Delays greater than 30 msec will start to produce discrete echoes. Delayed sounds will
be covered in deeper detail in a later lesson. Right now it is important to understand
the concept of how the brain deals with delayed sounds.