I have XAMPP installed on my computer, but I hardly use it.
With Firefox there are almost no problems to run things locally!
Even a recording with the microphone works on PC, tablet and mobile phone.
Test it.
You can download the zip file:
[Solved] Example of audio recording?
or copy the source code:
view-source:http://threejs.hofk.de/audioBasic/index.html
Then all you have to do is run the scripts
src="three/three.min.94.js"
src="three/OrbitControls.js"
src="three/THREEx.WindowResize.js"
into the appropriate folder.
Maybe the scripts are not in the right place for your copies. (It was my fault at first!)