Oh, I did not ask for the right thing then:
I was looking for a VU meter for RMS visualisation.
Regarding VU meters, I found a discussion from 2016 in this forum: https://forum-next.cabbageaudio.com/t/switching-images-with-slider/383/32
But that code does not seem to work with the images provided.
Is there any VU meter in the examples?
P.S.: Sure, the RMS meter with scale visualisation is working absolutely fine. 