Graphical animations, called Sounder objects move around child windows called "Sounder spaces". You can click and drag them, "throw" them in new directions, and even copy and paste them.
Set each Sounder object's properties (animation, notes, octave, etc) by right-clicking on it to bring up a property page.
Set the properties of each Sounder space (Midi device, channel, instrument, speed, etc.) by right-clicking in the Sounder space window.