[Bug 41047] Star Wars Racer videos have no sound

https://bugs.winehq.org/show_bug.cgi?id=41047

--- Comment #10 from [e-mail] ---
(In reply to [e-mail] from comment #9)
> Almost three years after opened this bug, I finally found a workaround,  I
> can now hear sound from cinematics and sounds ingame is still active. 
> Try this: 
> download this dll:
> https://github.com/legluondunet/MyLittleLutrisScripts/raw/master/
> Star%20Wars%20-%20Episode%201%20Racer/dsound.dll
> put sound.dll file in the main game folder, override dsound to
> "native,builtin", launch the game, so?
> I found this workaround on tweaking "Beyond Good and Devil", this game needs
> sound.dll to avoid audio desync.

What's the source of this dll file?