The Boss RC-20XL Loop Station can transform a performance by adding extra depth and layering, even giving you a ‘band’ feel as a solo performer. It works like a sequencer or groovebox and will allow you to layer your own played phrases in real time — as many ‘channels’ or stacks as you like, with 16 minutes of onboard recording space. It’s great for live or in the studio and is used by artists such as Nick Zinner of the Yeah Yeah Yeahs, Ed Sheeran, She Makes War and Lilies on Mars. You can save up to 11 loops at a time, and change tempo without changing pitch.