A simple, single-knob phaser that adds a swirling, jet-like modulation. Eddie Van Halen used it on the first two Van Halen albums for that unmistakable swooshing quality layered over his brown sound.
Both the MXR Carbon Copy and Boss DM-2W use the same BBD chip, but one is a dark ambient washer and the other a clean, versatile rhythm delay. Here's which to buy for your music.
The DS-1 and the Distortion+ are both cheap, both classic, and both constantly recommended — but they sound completely different. Here's what each one actually does, who should use which, and the settings that make them work.
Invert one of two identical takes, sum them, and what is left is exactly what the block changed. The setup, how to read a residual, and why null depth is a worse measure of similarity than it looks.