Following after one of my favorite sound artists, Francisco Lopez, as I record sound I am collecting the matter of sound. Lopez writes in an essay titled "This is Not La Selva: Sound Matter vs. Representation":
In my conception, sound recording does not document or represent a richer and more significant "real" world. Rather, it focuses on the inner world of sounds.
Both of the samples presented here are unaltered from their recording. There is only one layer, and that is the recording itself. If you detect multiple layers, that is architecture that you are bringing to the experience of listening.
In the first sample, an escalator outside Rotterdam's Central Station aspires to join an urban drum circle. Listen:
The second sample is from a train station ticket machine in Haarlem. Listen: