Compatibility Report

• Name of the game with compatibility issues: ARC Raiders
• Steam AppID of the game: 295600

System Information

• GPU: AMD Radeon RX 9070 XT
• Driver/LLVM version: Mesa (CachyOS Rolling Default)
• Kernel version: 6.18.5-2-cachyos (64-bit)
• Proton version: [ testet on Proton Experimental, GE-Proton9-20, Proton Hotfix ]
• Audio Server: PipeWire (CachyOS Default)
• Desktop: KDE Plasma 6.5.5 (Wayland)

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

The voice chat (Vivox engine) shows inconsistent behavior:

1. Party Chat works perfectly fine.
2. Proximity Chat fails to transmit.

Investigation via pw-top shows that during Proximity Chat attempts, the game (via Proton) requests an extremely high Quantum value of 2880, while the hardware microphone (USB Interface) runs at 256. The stream appears in pavucontrol but shows no signal level (stalled).

Additionally, the game forces the input device back to the hardware "Stereo" source, even when a module-remap-source (Mono) is manually selected. Since the t.bone MB7 is a stereo device with audio only on the left channel, the spatial/proximity engine might be failing to map the mono input to its 3D audio streams.

Reproduction

1. Launch ARC Raiders on a PipeWire-based system.
2. Join a party (Voice works).
3. Approach another player in-game to trigger Proximity Chat.
4. Observe that voice transmission stops.
5. Check pw-top: The stream for the game shows a Quantum (QUANT) of 2880 and stalls.

Logs

steam-1808500.zip

[Please see the attached steam-******.log]