Your guitar can talk, it just needs a little help from the Electro-Harmonix Stereo Talking Machine. This programmable Vocal Formant Filter dynamically shapes your playing with vowel sounds and envelope filter effects similar to a wah-wah and the Bassballs pedal. Sensitivity, attack and decay knobs control the envelope, and you can save your favorite presets as you go and instantly recall them when you need them. This powerful pedal is rounded out by true stereo outputs, a wet/dry blend and an expression input to sweep the envelope on the fly.