/System/Applications/Utilities/Audio MIDI Setup.app/Contents/MacOS/Audio MIDI Setup Allows users to set up audio and MIDI settings on their macOS machines. It provides the necessary tools to configure the audio output and input settings for devices such as built-in speakers or microphones, as well as external USB or FireWire audio devices. When it comes to MIDI settings, Audio MIDI Setup also allows users to map their controller devices to the different applications and also create virtual MIDI ports for inter-application communication.