Make the connection. STEREO|iO is a connection box that turns analog audio into digital signal. STEREO|iO has RCA plugs for use with virtually any audio equipment from DJ mixers to turntables, its other end has a USB connector for your Mac or PC. You can connect any line or phono-level gear to your computer for recording, mixing or processing. Or you can also use STEREO|iO as an output cable from your computer to inputs on an analog mixer, enabling you to mix MP3s and other music from a computer in your standard DJ mixer. STEREO|iO is a low-cost, problem-solving tool that can be invaluable for DJs and musicians at a gig or in the studio when you need to make a connection. The class-compliant USB device works plug and play for Mac and PC, requiring no software-driver installation or external power for operation. STREREO|iO is the perfect insurance policy for any working DJ. Never let making the connection stop you from a great gig.