Everyone knows the feeling of having a song stuck in your head. Once it starts it can be hard to make it go away. But the ultra-catchy tunes that stay lodged in your brain for hours are different. I’m talking about the dreaded earworm. These are the irresistible melodies and musical figures that you can’t help but hum under your breath.

Most home studios contain an arsenal of carefully chosen gear. From synths and groove boxes to guitars and drums, the tools in your studio need to be connected properly to work. But for some types of gear, making the right connection means you’ll need an extra piece of equipment—a DI box.