David Gilmour's MXR Phase 90 — slow sweep on 'Another Brick in the Wall Part 2' solo

The MXR Phase 90 was a staple of David Gilmour’s pedalboard from the late ’70s onward. On the solo for “Another Brick in the Wall Part 2,” he ran it with the speed set low—slow, almost lazy—so the phase pulse barely moves across the long notes. That subtle, barely-there swirl lets the Big Muff fuzz and the delay repeats stay clear while the sound breathes.

He used the same slow-speed setting on other iconic solos like “Time” and “Comfortably Numb.” But on “Run Like Hell” or “Young Lust” he’d occasionally crank the speed for a more seasick, urgent wobble. The Phase 90’s simple knob—just a rate control—meant he could dial in either extreme without losing the trademark liquid feel.