Immersive audio loudspeaker systems have many loudspeakers positioned around the listener, each speaker channel capable of reproducing unique content. This produces a far more enveloping experience than stereo. There are many different immersive microphone techniques in use, and they are still being developed because the format is relatively new. This chapter contains a brief introduction to some different concepts, starting with some two-dimensional horizontal mic arrays, and then three-dimensional immersive mic arrays. Most immersive mic techniques were developed for classical concert hall recording, but similar principles can be applied in large studio live rooms. Headphone reproduction of immersive content that was not originally captured using binaural mic techniques is now commonplace. There are consumer devices and software that can take a surround mix and render it for binaural reproduction. Software and plug-ins which will render fully immersive content for binaural reproduction are also available.