no possiblity to pauze music with the new button in chrome 'to change the music from tab to tab'

I can not find the music setting of zimjs into the chrome list of sounds.. more info about this new thing  (januari 2020) https://blog.google/products/chrome/manage-audio-and-video-in-chrome

can this be checked? I tried it with the example of http://zimjs.com/elearning/quiz.html and there comes no website with the music in it..

Thanks to fix this 
Karel