Audio signal processing to turn a track recorded in mono into a realistic stereo field. In an analog world, stereoizing is accomplished by remixing the mono track with a copy of itself, and panning the output channels hard left and hard right, with slightly different EQ on each channel to widen the image. In a digital environment, it is typically accomplished by overdubbing the mono channel with a copy of itself, and running each channel through a reverb, each set with a slightly different delay. In the analog case, this results in only a slight improvement in spreading the stereo image; with DSP, it is possible to use complicated combination of reverb and other psychoacoustic effects to get a fairly realistic stereo image. See also double-tracking.