Envelope controlled filter is a form of effect that goes beyond the mainstream, but is equally at home in a wide range of genres. It works really well and effective on guitar, bass, keys, and many other instruments.
Since the 1970s, Electro-Harmonix has been creating envelope filter pedals, making them one of the first to a pioneer this effect! The Electro-Harmonix Nano Q-Tron is based on that rich history.