I have been playing with this script off and on for about a month - trying to get the needles to look more realistic.
It's best to use with an audio limiter on the source audio, or else you'll be tweaking the input levels on every song.
It should work with any version of AutoIt, starting with 3.3.8.1.
Please report any problems with it. Credits are in the script.
Download: LIVE Analog Stereo Meter.au3