See quote below taken from the Virus TI OS Revision 2.0 Addendum
Patch Complexity Indicator
Playmode on the Virus TI hardware contains a new icon indicating the complexity of the current patch, analysing the available polyphony at your disposal. Similar to the battery status icon on a mobile phone, the icon shows between one and five bars where one bar stands for a rather "cheap" sound and five for a pretty "expensive" one.
Not sure if any of the other info you need is in there, but here's a link to it.
http://www.gobo.dsl.pipex.com/AddendumOS2.pdf
Ta
Jules