[Tutor] accessing the mixer

[Larry]

Hi,
I am trying to access the mixer in order to build a simple volume control,
for now.   (: 

Anyway I have found very little on google about doing anything at all 
with the mixer, though I have found ossaudiodev in the 'python library 
reference', so I'm trying to work from that. 

But now I find that my library reference in /usr/doc/python/html has no 
ossaudiodev listing in it.

So where do I get this? is it a module that needs to be installed?
Do I call it as a module as in;

import ossaudiodev

Any help appreciated.

Thanks