The Space Station has two types of on board virtual Mixers for transmitting different forms of MIDI Data, the Main Mixer and the User Mixer.

 
Main Mixer
Within the Main Mixer their are four different virtual Mixer's, one for Volume, Pan and Amplitude Envelope Attack and Release Times.  Each of these contain sixteen arrays of Faders and Switches, one for each MIDI Channel.

User Mixer
Within the User Mixer their are four different virtual Mixer's, each of which has sixteen user definable MIDI Faders and Switches, that are capable of transmitting any form of MIDI Data, on any Channel.  User Mixer's can be Loaded from the library supplied on disk or Designed using the Mixer Designer and Saved.  For a full listing on the three Mixer Levels, (Main Mixer, User Mixer and Mixer Designer) refer to the online manual or download it in PDF or HTML formats.