The Stereo Turbo Chorus gives a rich, thick, ebullient chorusing effect not available before from a single chorus unit. The FX67 Stereo Turbo Chorus has two completely independent chorus circuits. These chorus circuits are varied by a unique modulation scheme and mixed together which makes a distinctive chorusing sound. This technique gives the user truly different right and left outputs from a single chorus unit. The right and left chorus circuits are derived from separate chorus circuits and do not cancel each other out if summed together. This unique chorusing effect is un-duplicatable even with the use of two separate chorus units.