Power supply included. In 2019 the digital Attack Decay reissue was released, and now the Pico Attack Decay gives us volume envelope effects in a simplified, compact package. The Pico Attack Decay allows you to dial in volume swells and decays, both in Mono mode one volume envelope for all notes you play and the revolutionary Poly mode where each note to has its own volume envelope creating cascading swell effects and leads with agile attack smoothing. With intuitive functionality and simple controls, the Pico Attack Decay opens up creative avenues for any player interested in pushing the (volume) envelope.