Hello, and thank you very much for your support! Not sure why the motion filter would do that, but then again, I'm not massively surprised, and was going to suggest trying to disable that, among other things. Glad you got it working! :-)
Meanwhile, 0.7.5.1 doesn't have THAT problem here, but instead, I can't seem to get any sound out of it! Not seeing any of these problems with my development branch (latest SDL2 + various fixes and updates), so I guess it's about time for an update... :-D