Hi @OlmoVerhagen , this is not possible at this time and also not foreseen. 

Did read this blog in the mean-time, https://code.tutsplus.com/tutorials/the-web-audio-api-adding-sound-to-your-web-app--cms-23790. To be honest, I recognize the first part of the post (“Having been burned by these user experience atrocities, web developers stay well away from it.”); we had it in the WinUI but was often badly used and end users needed to turn off the sound to keep a pleasant experience. Then again, times are changing.  Curious to learn of others.

BTW: You cannot depend on sound alone as often the sounds of computers are turned off by default. So I do recommend to e.g. use a popup message or dialog, adding info to the status bar that shows ‘finished’ or ‘finished 3/20’ if you do 20 runs. 

Hi @Gertjan, thanks for you response!

We chose to include the pop-up message & status bar for this.