Gearank

The VoiceTone Harmony-G XT is designed specifically for the purpose of producing accurate and natural sounding harmonies, primarily targeting vocals with guitar backing. It takes advantage of the popularity of smart harmony effects, which gives you virtual back-up singers. The harmony algorithm of this unit is designed to adjust the pitch of the backing vocals depending on the chords being played.

This results in accurate harmonies that don't have to be programmed in advance, and the harmonies can follow you even when you modulate or change keys. The obvious caveat is that you have guitar accompaniment although some report that it also can work with other chord playing instruments such as keyboards.

Alternately there's also an option to set the pedal to use the key or scale that you'll be singing in.

Another cool feature of this pedal is the "Auto Chromatic Pitch Correction" which subtly adjusts your singing pitch to match the chords you're playing, I doubt it can save you from big pitch lapses but it can clean up microtonal differences - which in the end makes you sound good.

Key Features:

• Harmony: Smart Guitar-Controlled Harmony Algorithm
• Harmony Voices: Up to 2
• Pitch Correction: Auto Chromatic
• Effects: 6 Reverb/Delay Combinations, Doubling, Adaptive Tone (Smart EQ, De-essing and Compression)
• Phantom Power: 48V
• Guitar Effects: Reverb/Delay (Shared with Vocals)
• Inputs: 1 x XLR, 1 x 1/4"
• Outputs: 2 x XLR, 1 x 1/4" (Thru)
• USB Port: For Firmware Updates and Preset Backups
• Power: DC Power Supply

Pros
Market response to the VoiceTone Harmony-G XT was quite positive, with most users crediting the pedal for making their performances more fun and sounding better overall. For the price, you're getting more than your money's worth, especially when considering all the extra features. Treveor Curwen of Music Radar describes it as "A cost-effective way to enhance your voice and add harmonies that can be pitched to follow your guitar.".

Cons
On the flipside, there were some who felt that the features were a bit limited, but it does carry essentials like reverb and it automatically adjusts EQ and dynamics.

Overall
With its impressively high ratings, this backup-singer-in-a-box gets our thumbs up.

Unfortunately this has been discontinued, so if you're looking for something you can get new, check out our guide to Best Vocal Effects Pedals / Processors.