The MXR Phase 90 has been a popular pedal among guitarists since its release in the 70s. Many musicians picked it up and used it on several occasions. Here are a few examples that you will surely recognize: • Eddie Van Halen • Paul Gilbert • Johnny Winter • David Gilmour • Zakk Wylde • Jimmy Page • John Frusciante • John Mayer You can find countless examples of this pedal in records of pretty much every music genre. People have been using it on everything from guitar, bass, keyboards and even vocals.