I thought you might be interested in looking at Arma 3 low fps and degrade over time because of sound error, found what it cause (ssAdv) + steps to reproduce.
https://forums.bohemia.net/forums/topic/217328-arma-3-low-fps-and-degrade-over-time-because-of-sound-error-found-what-it-cause-ssadv-steps-to-reproduce/?do=findComment&comment=3297267
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