Adding Song Notifiers on Song Load?

Try this code at the start of your script, there are probably better ways to do it but this works for me.

  
-- Notifier handler functions  
local notifier = {}  
  
 function notifier.add(observable, n_function)  
 if not observable:has_notifier(n_function) then  
 observable:add_notifier(n_function)  
 end  
 end  
  
 function notifier.remove(observable, n_function)  
 if observable:has_notifier(n_function) then  
 observable:remove_notifier(n_function)  
 end  
 end  
  
  
-- Set up song opening & closing observables  
local new_doc_observable = renoise.tool().app_new_document_observable  
local close_doc_observable = renoise.tool().app_release_document_observable  
  
  
-- Set up notifier functions that are called when song opened or closed  
local function open_song()  
 print("A new song was opened")  
end  
  
local function close_song()  
 print("Song was closed")  
end  
  
  
-- Add the notifiers  
notifier.add(new_doc_observable, open_song)  
notifier.add(close_doc_observable, close_song)