what does the phantom button do on a mixer
Phantom power Phantom power, in the context of professional audio equipment, is DC electric power transmitted through microphone cables to operate microphones that contain active electronic circuitry.[1] It is best known as a convenient power source for condenser microphones, though many active direct boxes also use it. The technique is also used in other applications where power supply and signal communication take place over the same wires.
Xbox 360 controller The Xbox 360 controller has a guide button in the center of its face that provides a new functionality. This button is surrounded by a ring of lights divided into four quadrants that provide gamers with different types of information during game play. For instance, during a split screen multiplayer match, a particular quadrant will light up to indicate to a player which part of the screen he or she is playing on at that time. In this case, when the user pushes the button, he or she accesses the Xbox guide; a menu which provides access to features like messaging friends, downloading content, voice chat and customizing soundtracks, while staying in the game. The Guide button also allows users to turn off the controller or the console by holding the button for a few seconds (rather than simply pressing it).