20m minutes long, representing 5 days continuous recording with microphones 64 metres apart, accelerated 360 times to bring them into the range of human hearing, these sounds mark the diurnal cycle and log events that are usually inaudible - all explained in the sleeve- notes. Interesting, but only for those of you who are fascinated by such experiments. To civilians, this will sound like hissing, roaring, small glitches and occasional clicks. Loud close listening is required.