Downer

Emphasis on low frequencies with envelope following. The Downer creates dark, bass-heavy textures that respond to your playing dynamics - filter movement following your attack.

Low-pass emphasis serves bass-heavy applications - doom, stoner, anything where darkness matters. The envelope adds expression, letting playing intensity control the filter sweep.

Not bright and funky like typical envelope filters. Dark, heavy, responding to your playing while emphasizing low frequencies. The down direction, hence the name.