How to copy Note-On Layer to Note-Off Layer with LUA?

Renoise Tool Development Beginners Lua API Sandbox
1

Hi, I’m trying to figure out how to copy a Note-On Layer to Note-Off Layer.

Ideally I’d like it to function like this

C-4 plays C-4
Off plays C-5.

This is how I used to have it set up as, but it does not seem to work with Renoise 3.1.1 anymore.

local NOTE_ON = renoise.Instrument.LAYER_NOTE_ON
local NOTE_OFF = renoise.Instrument.LAYER_NOTE_OFF

local function copy_note_layers(source_layer,target_layer, offset)
  local instrument = renoise.song().selected_instrument_index
  
  --delete target layers prior to copying (to prevent overlays)
  if #renoise.song().instruments[instrument].sample_mappings[target_layer] > 0 then
    --Note that when using the delete_sample_mapping, the index is changing on-the-fly
    --So you have to remove the mappings from the last to the first entry instead of vice versa.
    --Else you get errors half-way.
    for i = #renoise.song().instruments[instrument].sample_mappings[target_layer],1,-1  do
      renoise.song().instruments[instrument]:delete_sample_mapping_at(target_layer, i)
    end
  end
  
  for i = 1,#renoise.song().instruments[instrument].sample_mappings[source_layer] do

    local base_note = renoise.song().instruments[instrument].sample_mappings[source_layer][i].base_note
    local map_velocity_to_volume = renoise.song().instruments[instrument].sample_mappings[source_layer][i].map_velocity_to_volume
    local note_range = renoise.song().instruments[instrument].sample_mappings[source_layer][i].note_range
    local sample_index = renoise.song().instruments[instrument].sample_mappings[source_layer][i].sample_index
    local use_envelopes = renoise.song().instruments[instrument].sample_mappings[source_layer][i].use_envelopes
    local velocity_range = renoise.song().instruments[instrument].sample_mappings[source_layer][i].velocity_range
    local oct_base_note=nil
    oct_base_note= base_note + offset
    renoise.song().instruments[instrument]:insert_sample_mapping(target_layer, sample_index,oct_base_note,note_range,velocity_range)
   end
end

local function norm() copy_note_layers(NOTE_ON, NOTE_OFF, 0) end
local function octdn() copy_note_layers(NOTE_ON, NOTE_OFF, 12) end
local function octup() copy_note_layers(NOTE_ON, NOTE_OFF, -12) end
local function octdntwo() copy_note_layers(NOTE_ON, NOTE_OFF, 24) end
local function octuptwo() copy_note_layers(NOTE_ON, NOTE_OFF, -24) end

renoise.tool():add_menu_entry {name="--Sample Mappings:Copy note-on to note-off layer +12", invoke = octup}
renoise.tool():add_menu_entry {name="Sample Mappings:Copy note-on to note-off layer +24", invoke = octuptwo}
renoise.tool():add_menu_entry {name="Sample Mappings:Copy note-on to note-off layer", invoke = norm}
renoise.tool():add_menu_entry {name="Sample Mappings:Copy note-on to note-off layer -12", invoke = octdn}
renoise.tool():add_menu_entry {name="Sample Mappings:Copy note-on to note-off layer -24", invoke = octdntwo}
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