HAZ Laboratories Mu-Tron III+ Envelope Filter Pedal

MU-TRON III+TM translates the envelope or "volume profile" of every musical passage, ...automatically... into an easily-controlled, vowel-like sound, as you play. Use MU-TRON III+TM to create a variety of synthesizer sounds with most electrified instruments: guitar, bass, keyboards, drums, flute, saxophone, brasses, ...even microphone.