> So, if I plug same source inverted and non-inverted into A-172, I get
> positive and negative full wave rectifier then Would this work
> precisely with audio signals too

While I tried to find our how this works and sounds I recorded a small audio
example that shows how the A-172 can be used for audio applications as a
dynamically controllable rectifier. Pay attention that no filters or VCAs
are used for the example. An mp3 link and a short description of the patch
can be found on the A-172 info page http://www.doepfer.de/A172.htm

Best wishes
Dieter Doepfer