Sonnox Oxford Envolution (HD-HDX)Shape your sound Envolution is a frequency dependent envelope shaper with separate transient and sustain sections to radically re shape the sonic envelope of your instruments or audio. Use a broader tilt mode or the more parametric style focus mode to choose which frequencies are processed. Insert on a track, bus or even master output to add presence distance to drums, piano, guitar and any other percussive content. Boost sustain to make the ambience