Digitech Vocalist Live 2 - HARMONIZER + EFFECT PROCESSOR FOR GUITAR AND VOICE

(This text is machine translated) Vocalist Live uses breakthrough musIQ ™ technology to directly analyze the output of any electric or pre-amplified acoustic guitar (no special MIDI guitars or hex-outputs needed). Then it generates the correct vocal harmony. For example, if you're singing an A over the chords that are generally found in the key of G, Vocalist will harmonize with a C. But, if you then play an A major, Vocalist will shift to the C # ... because like any good harmony singer, it listens to the guitar!