This is some really cool move from Electro Harmonix, their last effort is the Voice Box, an affordable harmony machine and vocoder that will allow you to create synth harmonies for your melodies, either vocal or played with any instrument. The result is like having backing vocals, overdub tracks or many instruments inside a compact box, and it looks like it is really useful and very fun to try some of its sounds, like we can see in the demo video.
The Electro Harmonix Voice Box features 256-band vocoder, 3 multi-harmony modes: low & high (low, 3rd and 5th below, and high, 3rd and 5th above), octave (2 notes ) and whistle (creates a whistle playing an octave above the note you are playing), 9 user presets, professional pitch shift algorithm, gender mod (that builds man- or woman-like voice), natural glissando, reverb effect with separated controls for dry and effected vocals, built-in mic preamp, +48V phantom power, gain switch and balanced XLR line output to use it with almost any system.
This device is powered by the supplied DC power adapter and comes with die-cast chassis that makes it hard enough to use it on stage. The Electro Harmonix Voice Box Harmony Machine / Vocoder is now available and its recommended price is $215.