Do you want a phaser, a chorus or a flanger? How about one pedal that has them all? We give you the lowdown on the beast that is the multi-modulation pedal... Okay, what exactly is a modulation effect ...

MusicRadar's got your back Our team of expert musicians and producers spends hours testing products to help you choose the best music-making gear for you. Find out more about how we test. Blackstar's ...