Originally Posted by: jsepeta

2 popular songs with the bagpipe sound are AC/DC's "It's a long way to the top if you wanna rock and roll" and Big Country's "In A Big Country"

Yes, and there is a lesson for "In a Big Country" here on GuitarTricks. In the Gear portion of the lesson, Mike Olekshy outlines a gear setup for getting the kind of bagpipe-like sounds used for the lead portions of that song, including a pitch shifter.