main.lua

function set_midifighter_buttons()
   local outs = renoise.Midi.available_output_devices()
   local instrIndex = renoise.song().selected_instrument_index
   local instr = renoise.song().instruments[instrIndex]
   local samplemappings = instr.sample_mappings[renoise.Instrument.LAYER_NOTE_ON]
   local colortable = {79,61,109,30 ,84,80,74}
   
   local out = nil
   local noteon = 0x90
   local noteoff = 0x80
   
   for i=1, #outs do
      if string.find( outs[i], "Midi Fighter 3D") then
         out = renoise.Midi.create_output_device( outs[i] )
         break;
      end
   end
   
   if out then
      -- clear all buttons
      for i=1, 127 do
         out:send {noteoff+2, i, 0x0}
      end
      
      --step through each sample
      for i=1, table.getn(samplemappings) do
         if samplemappings[i].base_note>23 and samplemappings[i].base_note<87 then
            if samplemappings[i].sample.mute_group>0 then
               out:send {
                  noteon+2, 
                  samplemappings[i].base_note-((renoise.song().transport.octave-4)*12),
                  colortable[samplemappings[i].sample.mute_group]
               }
               out:send {
                  noteon+3, 
                  samplemappings[i].base_note-((renoise.song().transport.octave-4)*12),
                  33
               }
            end
         end
      end
   end
end

renoise.tool():add_menu_entry {
   name = "--- Main Menu:Tools:Set midifighter button led ...",
   invoke = function() set_midifighter_buttons() end
                              }

renoise.tool():add_keybinding {
   name = "Global:Midifighter:Set button led ...",
   invoke = function() set_midifighter_buttons() end
                              }