ISP's Ultimate Noise Reduction Pedal No matter how noisy your guitar rig is, the ISP Technologies Hum Extractor pedal will make it whisper-quiet. This 2-channel noise reduction system boasts both a high-quality hum extractor and Decimator X noise suppression, empowering it to eradicate the full gamut of performance-wrecking sonic artifacts. Like ISP's Decimator G-String models, the Hum Extractor tracks directly from your guitar's signal — no more cut off notes when you switch from high-gain to clean tones. And every parameter of this pedal is customizable, enabling you to tailor it to your rig and application while guaranteeing transparent results. The Hum Extractor is ISP Technologies' ultimate noise reduction pedal. And given ISP's track record of success on that front, that's saying a lot! If you want to add a pro-level noise suppression system to your guitar rig, the Hum Extractor gets our top recommendation.2-channel design provides superior instrument tracking