This circuit board from a Mission Engineering Rewah Pro shows how the manufacturer shielded a potentially noisy

inductor coil with mu-metal shielding.

Simple techniques to banish pedalboard noise and hum.

Tracking down unwanted noise in a guitar rig is notoriously problematic. As a music producer and owner of on an independent label, I've faced this problem many times in recording studios. High-gain circuits, long cable runs, multiple power supplies, and many connections between pedals conspire to make the average pedalboard a hog's heaven for just about any type of interference. Problems include common- and normal-mode noise carried along the wires, as well as electromagnetic interference transmitted through the air. Here are a few steps you can take to isolate and remove various types of noise from your pedalboard.

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