Bringing together that inimitable funky sound with the premium components and functionality the company has staked their name on, the Source Audio Soundblox Bass Envelope Filter brings a classic effect into the modern era. Built in a sleek chassis designed to seamlessly integrate with other Soundblox models, the Bass Envelope Filter sports a whopping 21 filter sounds, positive and negative filter sweeps, and dual range speed control, all fed through a patented 56-bit digital signal processor.