Setup
Game Audio
Install BlackHole and switchaudio-osx to route Windows game audio through MoltenVR's stream to your headset's speakers or headphones.Game audio in MoltenVR is handled by routing the Wine game's audio output through a virtual audio device, capturing it, and embedding it in the video stream sent to your headset. Two Homebrew packages are required to make this work.
Install the audio packages
Install BlackHole 2ch
BlackHole is a virtual audio loopback driver that MoltenVR uses to capture game audio.
brew install --cask blackhole-2ch
BlackHole 2ch adds a two-channel virtual output device to macOS. Source: github.com/ExistentialAudio/BlackHole
Install switchaudio-osx
switchaudio-osx is a command-line utility used alongside BlackHole for audio device switching.
brew install switchaudio-osx
Grant Microphone permission
Open MoltenVR and start a stream. The first time game audio is used, macOS will display a permission prompt for Microphone access.
Troubleshooting
If you hear no audio in the headset after completing setup:
- Verify BlackHole 2ch is installed — open System Settings → Sound and check that BlackHole 2ch appears in the Output list.
- Check Microphone permission — open System Settings → Privacy & Security → Microphone and confirm MoltenVR is listed and enabled.
- Reinstall if necessary — if BlackHole does not appear in the Sound panel, rerun
brew install --cask blackhole-2chand restart your Mac.