@bita
You must change over time the value of the variable.
Here is a modification of the code used by @SteveJG
Gauge_alt.aia (44.4 KB)
Edit:
App with extension com.KIO4_VUmeter.aix
Gauge_alt_v2.aia (55.9 KB)
Here with Canvas:
p139Ci_Extension_Microfono_VU.aia (10.1 KB)