The mixer forms the heart of your PA system or recording studio, providing audio inputs and outputs, routing capabilities and more. Studio and live sound mixers alike are systems for combining signals and routing audio where it needs to go. A live sound mixer generally needs to feed a set of main speakers and also provide a few monitor mixes, whereas a traditional studio mixer might also require direct outputs from every channel for multitrack recording. The line between “studio” and “live sound” mixers is pretty blurry these days, so the best place to start is with the various parts that make up a mixer.