Yeah, sorry about the lack of info, I always manage to leave out some obvious but critical info while include others. I'm on Win 10 and the crashes are not a problem now, at least I've read in a few places that the MP3 format is what's buggy and causes it, so it shouldn't be a problem anymore. If you meant the crashes when I have the flac files, I can provide the openxcom.log file, but there's nothing useful in it from what I can see.
[22-01-2017_23-18-56] [INFO] Data folder is:
[22-01-2017_23-18-56] [INFO] Data search is:
[22-01-2017_23-18-56] [INFO] - C:\Users\Int\Documents\OpenXcom\
[22-01-2017_23-18-56] [INFO] - D:\Games\OpenXcom
[22-01-2017_23-18-56] [INFO] - D:\Games\OpenXcom
[22-01-2017_23-18-56] [INFO] User folder is: C:\Users\Int\Documents\OpenXcom\
[22-01-2017_23-18-56] [INFO] Config folder is: C:\Users\Int\Documents\OpenXcom\
[22-01-2017_23-18-56] [INFO] Options loaded successfully.
[22-01-2017_23-18-56] [INFO] SDL initialized successfully.
[22-01-2017_23-18-56] [INFO] SDL_mixer initialized successfully.
[22-01-2017_23-18-56] [INFO] requested file not found: openxcom.png
[22-01-2017_23-18-56] [INFO] Attempting to set display to 1920x1080x8...
[22-01-2017_23-18-57] [INFO] Display set to 1920x1080x8.
[22-01-2017_23-18-57] [INFO] Loading data...
[22-01-2017_23-18-57] [INFO] Scanning standard mods in 'standard'...
[22-01-2017_23-18-57] [INFO] Scanning user mods in 'C:\Users\Int\Documents\OpenXcom\mods'...
[22-01-2017_23-18-57] [INFO] Mapping resource files...
[22-01-2017_23-18-57] [INFO] Resources files mapped successfully.
[22-01-2017_23-18-57] [INFO] Loading fonts... Font.dat
[22-01-2017_23-18-57] [INFO] Loading extra resources from ruleset...
[22-01-2017_23-18-57] [INFO] Data loaded successfully.
[22-01-2017_23-18-57] [INFO] Loading language...
[22-01-2017_23-18-57] [INFO] Language loaded successfully.
[22-01-2017_23-18-57] [INFO] OpenXcom started successfully!
[22-01-2017_23-18-57] [INFO] Using software scaling routine. For best results, try an OpenGL filter.
The crashes are both the regular Windows crashes, "OpenXcom has stopped working"
As for the sliders, yes I can see, but if I have the format set to MIDI the music slider changes the volume of everything in the game not just the music, and that's the problem. Anyway in the meantime after some testing I found out that the game only crashes if I have certain files in the sound folder from the adlib-flac package. The one that made the game crash immediately was gmstory.flac. After I took it out the sound came back and I could change the volumes separately again, but when I loaded a save it crashed. So decided to see what would happen if I switched back to ogg format, and now that works. So my issue seems to have solved itself randomly again, which is great for me until it happens again.