Its about adding sounds to the model according to the selection of annonations

Hi, I am here to ask how to add sounds per annonation while appening the model to the website. yes i have visited the js fiddle site as well and i also know that basic only provides only 3 sounds but still its not that clear how i can add my mp3 atleast the 3rd according to the annonation.

This codepen has a clear implementation of sounds and annotations:
Sketchfab itself does not support sounds currently, so you’ll have to load them externally.