Dark Sector (29900) Audio Issues

[nded03]

Compatibility Report

• Name of the game with compatibility issues: Dark Sector
• Steam AppID of the game: 29900

System Information

• GPU: Geforce GTX 970
• Driver/LLVM version: nvidia 396.54.09
• Kernel version: 4.15.0-38-generic
• Proton version: 3.16-4 beta
• Full system information report

I confirm:

• [x] that I haven't found an existing compatibility report for this game.
• [x] that I have checked whether there are updates for my system available.

Symptoms

Audio playback is borked; the game seems unable to output any sound at all. No amount of fiddling with the game settings or dll overrides seems to fix it. Proton log repeats the following line:

fixme:dsound:IDirectSoundBufferImpl_AcquireResources (0x14be4ca0,00000000,0,(nil)): stub, faking success

Proton log here.

Reproduction

Install, and play game. Listen for audio playback.

[ghost]

Sadly, there's too often log entries that look like problems but aren't - you can put anything into the log and even make nothing look like an error. It looks like this one is just something that may not have any bearing on the audio issues here. Different game, person says sound not an issue with same entry.

fixme:dsound:IDirectSoundBufferImpl_AcquireResources (0x30f2d98,00000000,0,(nil)): stub, faking success

These 2 lines are spammed a lot, the later might be a bit different than I posted, but I see a lot IDirectSound lines Sounds arent an issue. Or haven't been.

https://www.codeweavers.com/compatibility/crossover/forum/assassins-creed?msg=159566

I know its a total pain.

[nded03]

Audio output seems to be functional as of Proton 3.15-5 beta. A bit glitchy, but very promising. Audio sometimes desyncs and becomes scratchy and distorted over time, the latter issue can be mitigated by placing PULSE_LATENCY_MSEC=60 %command% in the launch options.