The Electro-Harmonix Stereo Talking Machine Vocal Formant Filter offers vowel shaping controlled by the player’s dynamics. Its nine selectable Voices deliver vowel sounds such as AH-OO and OW-EE, as well as Bassballs and wah-type dynamic filters. The Voices can be shaped with the pedal’s Attack and Decay controls, while Sensitivity adjusts the envelope response. The resulting effects mimic characteristics of human speech and create sounds that are both organic and harmonically rich. As its name implies, the Stereo Talking Machine possesses true stereo outputs as well as an Effects Loop. An Expression Pedal provides real-time control over filter sweeps, while nine preset locations let the player store and instantly recall programs. Read more at ehx.com