this is how they recorded seadrum, yoshimi:“We set up our drums kits on wooden boards in the sand, and we didn’t stop playing until the tide came in and the drums started getting wet. Then we submerged a mic in the water to record the sound of the drums under the sea. We set up so many mics—there’s no way we could ever listen to all the tracks. But we ended up using the essence of that recording in “Seadrum.” pretty cool!
here is a pic when they recorded seadrum: