This is a graphical utility for performing a number of tasks related to the sound server. The default window displays two volume level indicators and a slider to control overall output volume. From the View menu you can select other functions:
Opens a window which shows a real-time spectrum analyzer style display.
Displays active sound sources and allows you to connect them to any of the available busses.
Shows if the sound server is running and if scheduling is real-time. Indicates when server will autosuspend and allows you to suspend it immediately.
Shows active Midi inputs and outputs and allows you to make connections [TODO: Does this work yet? Need more detail].
Connects a FreeVerb reverb effect to the stack of aRts output effects and allows you to control the effect parameters graphically.
Changes the volume indicators in the main window to use a colored LED display format instead of progress bars.