A high-fidelity dual looper? An all-in-one backing band? A box of easy-to-use sonic creativity? The Boss RC-10R Rhythm Loop Station bills itself as all of these and still more than the sum of its parts. A two-track stereo loop engine with 32-bit AD/DA and 32-bit floating-point processing packs six total hours of recording time, but that's only half the fun: 16 onboard drum kits and 280 rhythm presets let you craft entire rhythm sections on the fly when you're jamming by yourself or up on the stage.