Cool new widgets but how to Get/Set value from BP/code?

Development Programming & Scripting
1

So I noticed these cool widgets I can use in a widget BP, I think they come from enabling meta sound.
They seems to work and look quite nice, however there’s no way to set the value from blueprint or C++. Also if you close the widget and open it again they reset their value to 0.

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So I did find a way to set the value in C++ by creating a child class of the AudioSlider and accessing the MyAudioSlider which only becomes valid once the widget is visible.
I have yet to find a way to get the value.
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Thank you.