audio playback in linux/flatpak version sounds wrong

[RushJet1]

SLADE Version: (3.2.4) Operating System: Linux

Issue Details: Playback quality in the flatpak/linux version sounds like it has some kind of bad EQ processing going on. Things play back correctly in 3.2.2 for Windows running in wine.

comparison.wav.zip

This is a comparison of the two. The first part is a file being played through 3.2.4 and the second is one being played through 3.2.2 in wine.