Tip31b

Hi, I have a tip31b transistor and wish to use it to amplify some audio so i can read and interpret the output generated on arduino's analog in..

How exactly do i use this transistor to do that?

Thanks!

This is not a good transistor to use for this. It is a power transistor and has a very small gain.

If you want to try this sort of circuit is as good as you can do with one:-
http://www.tpub.com/content/neets/14179/css/14179_105.htm

Tried something similar.. Ya. the gain is pretty less. peak voltage it reached was something like +2v