Compatibility Report

• Name of the game with compatibility issues: Overwatch
• Steam AppID of the game: 2357570

System Information

• GPU: AMD RX 7900 XTX
• Video driver version: Mesa 26.0.6
• Kernel version: 7.0.9
• Link to full system information report as Gist: https://gist.github.com/tannisroot/5df94a09ebcb0dfd00dfc2a58d6aeb54
• Proton version: 11.0 (Beta)

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.

Log file:
steam-2357570.zip

Symptoms

Despite Proton Voice being detected in Overwatch's Accessibility settings when Proton Voice Files are installed, when you press "Play Sample", it doesn't play anything.
In the Proton log, I noticed the following line:
130719.787:0134:02ac:fixme:sapi:spvoice_SetPriority (000000000AD755C8, 0): stub.

Reproduction

1. Have Proton Voice Files and Proton 11.0 installed
2. Have Proton 11.0 selected for Overwatch (2357570)
3. Launch Overwatch, you should hear music while in the menu.
4. Press ESCAPE, open Options, Accessibility tab, Tech to speech sub-tab
5. Verify Proton Voice shows up as a Voice (see image above)
6. Press "Play Sample"
7. Hear nothing