The chirps and whirs of the quantum drive interstellar craft reminded him of a forest full of songbirds. Each note an indicator of a system at work, power, waste reclamation, hydroponics, communications, and many others, a chirping serenity letting him know the health of his ship at all times.
Beneath all of the other sounds came the heart of the ship itself, the quantum drive, that engine capable of existing in more than one location at the same time and shifting him and the ship around him to any of those other places. The sound, mostly in the infrasound end of the spectrum, below even his attenuated sense of hearing, came more as a feeling in his chest, deep in his bones, abiding, a life around him. All the more disturbing then when he awoke one morning to silence.