Source Audio SA121 Soundblox Tri-Mod Wah 11 Wah sounds, including Classic Wah, 2 Low Pass filters, 2 Band Pass filters and 6 Multipeak filters. 3 Modulation Source Options: LFO, Envelope Follower, and Hot Hand Motion Sensor. State-of-the-art DSP - our proprietary 56-bit Digital Signal Processor, the SA601 and crystal-clear 24-Bit converters.