Complete instructions for this episode of Weekend Projects can be found at makezine.com/projects/song-devocalizer/ After fiddling around with a defective headphone plug, makers Jeffrey Goller and his son Nathan set about exploring the left and right channels of popular audio tracks. This led them to create this inexpensive voice-canceling - or devocalizing - enclosure box. It effectively allows you to remove any track mixed equally to both channels of stereo audio.