The EHX Intelligent Harmony Machine instantly creates matching harmonies to what you play. Its like having one or even two guitarists jamming with you at the same time and always in perfect sync. The Intelligent Harmony Machine opens a door to the music of great multi-lead guitar bands and multi-part harmonized solos. Plus, its ability to apply harmonies ranging from simple to sophisticated will totally transform what you play. Of course, it also boasts EHXs renowned impeccable tracking and genuine musical tone. w/box