The Phase 90 has found its way into many of Eddie Van Halen's recordings, adding a shimmery velocity to lead passages or a more dramatic swoosh to muted strumming. Not just for guitars; it works well with bass, keyboards and even vocals. Vary the speed from a subtle, long cycle to a fast, watery warble...and myriad vintage vibrations in between.
It has one of the best features a pedal effect can have - it is a one knob pedal! One knob pedals can either be stellar or horrible, the Phase 90, by all means is a stellar phaser. With every inch of a turn you get a world of tone.