A question for the ages: if the TC Helicon VoiceTone Harmony-G had been available in 1957, would the world know the name "Art Garfunkel?"

The Harmony-G make solo singer-songwriters sound like a duo or trio -- or like they're rolling to their local open mic with a Baptist choir. You can select any number of intervals, voices and other effects for realistic harmonies and professional sounding vocals.

If that sounds complicated, perhaps this will ease your mind: the Harmony-G features a guitar input that analyzes the chord being played, and adjusting relative key appropriately for the generated harmonies. Of course, you still need to sing in tune with the guitar yourself, but TC Helicon deals in pedals, not singing lessons.

Another generous feature of the Harmony-G is the "Vocal Tone" switch. When engaged, it taps into a bank of processing presets configured by renown recording engineers that compress, EQ and de-ess your vocals in real time. Think your Barry-Gibb falsetto shrieking is getting on your audience's nerves? Kick in the tone control and mellow out, musically.

The Harmony-G sports an XLR mic-level input (supplying phantom power) and out out, and 1/4" guitar inputs and throughputs for connecting to your guitar effects and amps. The Harmony-G also acts as a mic / line mixer for combining guitar and vocal signals into the same balanced XLR out.

Plus, it will never try to sing "Bridge Over Troubled Water" by itself.