About MDoubleTracker :
MDoubleTracker is a marvelous natural sounding artificial stereo expander. Need some wide vocals? Or some huge guitars? MDoubleTracker has been designed for just that!
Natural big sound, like the real thing
With MDoubleTracker it is as simple as inserting the effect into your DAW. It will do some magic by varying pitch and delays in both left and right channels to get you that big wide sound, with ease and perfect timing. It can be even used in surround environment.