TC Helicon VoiceTone Harmony-G XT Vocal Effects Processor NaturalPlay guitar-controlled harmony algorithm stacks up to 2 more voices from our flagship processor Listens to guitar and voice to create the correct harmony parts 6 reverb/delay combinations for vocal and guitar input 10 presets, each with A/B options USB for software updates, tips, and preset management using the included VoiceSupport app