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ci: silence alert sounds on Blacksmith so system audio stays empty on macOS 15 #2766

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Merged
richiemcilroy merged 1 commit into from
Oct 22, 2026
Merged

ci: silence alert sounds on Blacksmith so system audio stays empty on macOS 15 #2766

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9 changes: 9 additions & 0 deletions .github/workflows/verify-recording.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -251,6 +251,15 @@ jobs:
done
SwitchAudioSource -s "BlackHole 2ch" -t output
SwitchAudioSource -s "BlackHole 2ch" -t input
# macOS 15 plays alert and interface sounds through the default
# output, BlackHole, so ScreenCaptureKit records them as system
# audio and Instant's mixed track and every export carry them over
# the microphone markers. Hosted runners and macOS 26 capture
# silence there; silence these too so every runner records the same.
osascript -e 'set volume alert volume 0' || true
defaults write -g com.apple.sound.uiaudio.enabled -int 0
defaults write -g com.apple.sound.beep.volume -float 0
defaults write -g com.apple.sound.beep.feedback -int 0
echo "outputs:"; SwitchAudioSource -a -t output
echo "default output: $(SwitchAudioSource -c -t output)"
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