I don't know anybody that has ever even heard a Northumbrian pipe septet, outside of Northumbria I guess.

But you might want to check in at the Home Recording Page at About.com

--very informative site, lots of links to people who really know their recording techniques, including acoustic specialists...

The host is:
Kevin Becka - Your Home Recording Guide

http://homerecording.about.com >mailto:homerecording.guide@about.com

Bill C