Read "Address: Centauri" by Floyd L. Wallace online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
In the beginning there was silence and it never changed. No sound came to break the stillness. Darkness changed to light with regularity or not, but in the particular universe in which she lived there was never any noise nor any conversation, and music was unknown. She didn't miss it.
There were also machines in the universe in which she dwelt and these too observed a dichotomy. Some machines were warm and soft and this distinguished them from those which were hard and cool. The warm ones started themselves when they were very small. Later they grew up but they didn't know how they did it. Neither did she. Once she was little and she didn't remember doing anything to change it, but it did change.