This is the Liberty High School drumline performing March 5, 2011, at Bakersfield High School. This isn't the complete show, but it's the longest they've performed this PPAACC season.
This was shot with my Droid, so the audio is distorted at times (drumlines can get kinda loud, you know). But there's enough dynamic range throughout the show that you can hear some of the nice touches, such as the echoes at the start.