Paul Drew uses a couple of Waves Stomps on a piano and the sound is very cool - check out the free video tutorial
From Distortion, Doubler and Delay to Flanger, Phaser, Fuzz and more, GTR3 Stomps give you everything you need to customize your tone. With features like sync-to-host BPM and real-time MIDI control, it’s never been easier to dial up your sound. And with Waves Tuner’s standard, chromatic, and alternate tunings, you’ll always have perfect pitch..