I think I found the Artist and Song title playing during the scene(s) when Catherine is in the elevator looking for the cotton fiber.
I thought I recognized the sound and feel of the music. Thought it sounded a lot like Telefon Tel Aviv. I believe the song in question is "When It Happens It Moves All By Itself" from Telefon Tel Aviv's Map of What is Effortless album. Seriously consider checking out TTA if you liked that song. Both of their full length albums are excellent (Fahrenheit Fair Enough, and the aforementioned Map of...)