Describe the bug
After launching SteamVR the headphones in the headset stop working until I unplug and replug it to the link box.

To Reproduce
Steps to reproduce the behavior:

1. Test audio through headset with pavucontrol (audio works)
2. Launch SteamVR or any SteamVR game
3. Audio gargles and stops.
4. Stop SteamVR (audio still doesn't work)
5. Unplug headset from link box.
6. Audio device disappears from pavucontrol
7. Plug headset back in to link box.
8. Audio now works again.

Expected behavior
Headset audio continues working after starting SteamVR

System Information (please complete the following information):

• Distribution: [Gentoo]
• SteamVR version: [1.10.32]
• Steam client version: [Built: Apr 8 2020, at 20:52:25]
• Opted into Steam client beta?: [Yes]
• Graphics driver version: [Nvidia 440.64]
• Gist for SteamVR System Information: https://gist.github.com/dotWAVE/3cf8bab11976f26d7348416b7165474a

Note: Commenters who are also experiencing this issue are encouraged to include the "System Information" section in their replies.