Korg M3 User Manual page 26

4
RADIAS (when the EXB-RADIAS is installed)
If the EXB-RADIAS option is installed in the M3, you'll be able to edit RADIAS
programs using M3 Editor. Bank INT-F is dedicated to RADIAS programs. You can
also assign desired user banks to be dedicated to storing RADIAS programs.
In Combination mode and Sequencer mode, you will also be able to use a special
screen to edit the vocoder section separately from the sound generator.
24