I think I may have found a solution to this sound bug. Create a shortcut to the BattlefrontII.exe file found in the game's folder. Right-click it and go to Properties, then in the Target field add " /audiomixbuffer 50" with no quotes at the end of the path. That seemed to fix the constant audio stuttering.

Thanks, will give that a shot. Kind of annoying.

Thanks, it fixed the audio stuttering for me.

So i have stuttering problem...i put in as you said i get Fatal when i try to run shortcut

Necro but relevant - how do I properly type the command into target field?

So I had this problem, but at first when I tried to fix it I just entered in the command into the GOG shortcut. If you're reading this and that's what you're doing: you're doing it wrong. As OP stated MAKE A NEW SHORTCUT directly to the BattlefrontII.exe, the GOG shortcut actually takes it through another launcher all together that doesn't know what to do with the audiomixbuffer command.

If you make the shortcut to BattlefrontII.exe and add the command to it, you shouldn't have any problems (though you may have to make the mix buffer larger depending on your machine, apparently up to 200 is fine). Figured I'd comment this as I'm sure I'm not going to be the only person who tries to outsmart the instructions at first.

Thanks for the fix OP.

Miss post.

I expect a solution to this was never found? I tried the fix suggested:
Create a shortcut from the launcher in the GOG folder, not the desktop one provided.
Right click on it, and under the "Target " field enter audiomixbuffer 50 one space after the command line. Doesn't work with no space.
It looks like this: "E:\GOG SSD\Star Wars - Battlefront 2\SWB2Launcher.exe" audiomixbuffer 50

E\GOG\ is the installation path on my SSD drive. Typically it might be C:GOG\Games\Star Wars, etc.

Edit: I hadn't noticed the post from AnotherAvatar, but tried changing the number to 200, and then 90. But it still doesn't work. I suppose this means the game is broken for me.

Edit2: https://support.starwars.com/hc/en-us/articles/360000695423-How-do-I-fix-sound-and-display-issues-in-STAR-WARS-Battlefront-II- I went here, and realised the higher end your CPU is, the lower the number should be. So I set it to 1 and then fiddled with the sound sliders as they suggested. It doesn't happen as much now, and is acceptable.