Push Sound Mix Modifier not working

[Doc.gdi]

I’m trying to make a water muffled effect via Push Sound Mix Modifier (so all sounds, music, bullets, steps, etc are muffled) but it just don’t work (the sound doesn’t change)

I followed this tutorial

And this is my bp (when I enter the box it prints the text)

And here is my level (with the box and sound)

[JackFrench]

I’m having this exact same issue. Have you discovered any solutions?

[Doc.gdi]

Did not find any solution so far

[Plagia]

Found this topic after following the same muffled audio tutorial, I don’t suppose anyone found any way to fix this issue?

[Dogesmith]

I’m still facing the same issue today. Any luck from anyone?