The Opus-Two Instrument Control system allows the following pipe driving features “out of the box” (no special programming or magic required):

  • Program using stop names instead of tab numbers (makes changes easier ‘years later’)
  • For each tab on the console, easily define which rank plays at what pitch on which keyboard
  • Ability to define any combination of custom couplers
  • Easily work with chest wiring – if chests are wired split (C/C#), they can be driven that way
  • Intelligent design – For example, if a flute unit does not have the top 12 notes, they can be programmed to repeat the pipes that are there.  When the pipes get added and the rank is complete, one programming change will update every stop that uses that rank.  Each one does not have to be reprogrammed.
  • Borrowing extensions from other ranks
  • Complete control of all expression outputs (where on the shoe each stage fires and the number of stages)
  • Out of the box, Opus-Two pipe drivers are rated at 500ma per output, however, using Superdrivers, outputs are raised to 1A each (12 ohm load).
  • Theater organ features (trap lines, reiterations, etc.)
  • Independent MIDI In, Out, Thru in the chamber.  External MIDI devices can be defined as ranks within the software (allowing intuitive control of external devices such as Hauptwerk or WRX from the console) or as fully functional MIDI ports like on the console (sending keying information and stop information).
  • Ability to pass SYSEX messages back and forth between the chambers and the console (allowing digital voicing over MIDI)
  • Numerous “bells and whistles features” such as Melody Couplers, Bass Couplers, Pizzicatto Couplers, Sustain & Sostenuto.
  • Groups of (or individual) notes can be wired anywhere on the output card matrix and can be programmed to work in the configuration file.  Ranks do not have to start on “Output #1” of a driver board.
  • Hybrid Ranks (synthetic mixtures) and multi-draw ranks (celestes)

These features and many more and performed REAL TIME, without the need of a computer core.  The only competing systems that even come close to these features rely on “black boxes” (or computer cores).  The Opus-Two system does not need external hardware to perform any of its functions.


Special features can be easily created on site by using the JAL programming language.  For example, the system can handle sequencing of blowers on organ startup, control of external devices (chamber lights, signal lights, anything).

There is no instrument to big or too small for this system.