The Bass Envelope Filter is a continuation of the evolving line of Source Audio effects optimized specifically for the bass guitar. There are 21 different envelope filter effects to choose from including 2 Pole and 4 Pole Low Pass variations, Single Peak, Triple Peak, Peak/Notch variations, as well as Phaser settings. Each of these settings can be further modified with a variety of control options including positive/negative filter sweeps, sweep range, attack and decay speed settings, or frequency range selection.All Soundblox effects pedals are compatible with the Hot Hand Motion Controller - available separately in wireless or wired configurations. Soundblox pedals provide a wide variety of original sounding effects in a sleekly designed, rugged package that is easy to use and highly flexible.