Stream Music channel and control volume

General
1

I’ve created a Test App on Mac to Load Radio- and/or TV-Channels with htmlViewer (htmlViewer.LoadURL(“http://www1.iwannahearthatstuff…”).
What i try to figure out is to change the Volume of the Stream without changing then overall Systemvolume.
Has anybody an idea how to do that?

Thanks in advance.

2

Chances are the HTML5 Audio player is used. So you can manipulate it in JavaScript.

See https://www.w3schools.com/tags/ref_av_dom.asp

3

Thank’s Michel, i’ll Check this out.