I was just about to post the
download link. It comes in two versions: normal and volume reduced by 6db (I thought the normal one was a bit too loud ingame). It's OK if you don't use it, I'll find a use for it anyway. Told you it would be more suited to a full library map! ;) The idea behind it was that the writing sounds you hear are actually invisible ghosts of ancient copyist monks who follow you everywhere through the map, hence their constant volume. The hum/rumble (humble?) was for extra eeriness.
I could upload the multitrack if you want to make point ambient sounds out of it, let me know (it won't be mastered, though). Or you could DIY - the samples I used are listed in the readme below, though I modified them.
If you, or anyone else for that matter, decide to use it anyway, please add this to your readme:
MUSIC:
Filename: trackXX.ogg
Title: The Infinite Library
Time: 4'26"
Composed by Guillaume "Mugwump" Perez a.k.a. The ?uestion Mark.
Mastered by David "dumptruck_ds" Spell.
Released on 07-27-2017 under Creative Commons license CC-BY 4.0.
Samples used from freesound.org:
book-close-03 by koops
flipping-through-pages by vladnegrila
psani-brkem by 6polnic
readingroom by bulldozia
room-tone-large-room-library by lwdickens
turning-book-pages by et-graham
writing-with-pen by jasonelrod
writing-with-pencil by jasonelrod
https://creativecommons.org/licenses/by/4.0
You like The ?uestion Mark's music? Explore more!
https://thequestionmark.bandcamp.com
https://soundcloud.com/the-question-mark
https://www.indabamusic.com/people/thequestionmark
As before, replace the XX with the track number of your choice and rename the file accordingly.
PS: Sign of Koth wasn't exactly ambient. This one is.