Hi ,
I am running Pillars under 64bit Debian testing (Jessy), 4 Gig RAM, NVidia 550 Ti (2 Gig RAM) with Nouveau drivers, pulseaudio mixer.
The problem is that when the in-game hints close (the roll of paper opening with some informative text on, then closes with characteristing sounds)
an annoyingly persistent paper folding sound artefact remains.
Please let me know if you need some more specific data to diagnose the issue.