Roland S550 Hacker Mode:

 - Once loaded, Press these buttons in this sequential order:

   FUNC -> MENU -> [down arrow] -> EXECUTE -> MENU -> 0 -> DEC/NO

 - Video monitor now shows "Hacker Mode"

 - Press UTILITY, then press MENU to load the new utility
   menu from disk.

 - Click on or cursor over to "THE TEST" and hit enter.

 - Now you have all the test mode stuff.



Supposedly in the HACKER mode, the S550 will support standard dump
format (SDX) sound files.