For the author, they will choose the best musical note combos (only by singing the musical note combos will they know)
The purpose of The Jelong Musical Note Combo in creating many song versions is: different individuals (whether they are singers or not) will create completely different musical note combos (cannot be the same) when singing.
Suppose there are 1000 people singing a same song, each time you listen you will hear different musical note combos, you look forward to seeing how other people will sing that part, whether it is good or not, interesting or not.