Memotone

I went up over the hills into a large valley with a pine wood on one side and the edge of a distant vale behind. Once up there I set up my binaural microphones on a tripod with a dummy head and climbed a little way down the valley leaving my microphone recording at the top. I then lit a dynamite banger and threw it high into the air. The banger exploded peeling and echo over the hills and wood and finally, 10 seconds after the initial explosion, a soft scattering of sound against the rim of the distant vale.