Finally getting around to reviewing some (relatively) recent field recordings. This one is a standout from the Crex Meadows workshop I attended in 2012.
I don't even remember how we found this thing, but I find it to be a really satisfying document. It's a very large pipe just barely protruding horizontally into a lake. Water alternately fills it and falls away, gurgling massively as it does so.
I forgot to take a photo. As far as I recall, the recording kit was an Audio Technica AT8022 stereo mic into a Zoom H2 recorder.