How to increase/decrease the volume using slider

Hi,

I'm hoping that someone might have solution for my problem, because I don’t have a good knowledge about JavaScript to write a code that would execute this action.

My problem: Is there a way to add my own custom volume control to increase/decrease using slider?

In one of my current projects, I’ve created custom navigation buttons. But unfortunately, I’m not able to understand how to increase/decrease the volume using slider.

Thank you!

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