The TC Helicon Voicetone D1 pedal is the perfect addition to any rig and brings studio effects with you to your live performance!! The Voicetone D1 pedal thickens your live vocals with realistic doubling emulations, octaves, and detune effects in one simple, compact package. Easy to connect between your mic and mixer, the voice tone can be chained to additional Voicetone Singles and the mic preamp is studio quality with phantom power so it won't negatively effect your sound. The doubling effect has been perfected by the researchers at TC Helicon to differentiate between pitch shifted voices to give a convincing group unison vocal effect.  The Doubling styles are as follows:  • Tight • Loose • Group • Detune • Thick • Octave Up • Octave Down • Shout