Inspired by one of the great envelope filter pedals of the 1970's and developed with guitarist Mark Karan (Delaney Bramlett, Bob Weir & Ratdog, Jemimah Puddleduck) the Hartman Envelope Filter is a recreation of a classic effect optimized for tone, flexibility, and ease-of-use. The Hartman Envelope Filter employs select, low-noise components for its signal path and an optically controlled state-variable filter for authentic timbre and response. A second foot switch permits change of filter sweep direction for on-the-fly access to a broad palette of classic filter sounds from funky chirps and saturated quacks to subtler flute-like attacks and horn-tones. An active Mix control blends filtered and unfiltered signal. Factory preset internal trim pots permit additional tuning of filter action. Description: