Audio does not fade in correctly on scene transition when using Game Capture with Capture Audio (BETA)

[emomilk]

Operating System Info

Windows 10

Other OS

No response

OBS Studio Version

32.1.1

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/kHddVHNLXELQdUDo

OBS Studio Crash Log URL

No response

Expected Behavior

Audio should fade in on scene transition when scene transition is set to Fade.

Current Behavior

Audio is silent until the scene transition is complete and then kicks in at full volume.

Steps to Reproduce

1. Start with two empty scenes
2. In Scene 1 create a Game Capture source with Capture Audio (BETA)
3. Set scene transition to Fade (I use 3000 ms)
4. Switch to Scene 2 (empty scene)
5. Switch back to Scene 1

Anything else we should know?

When switching to empty scene, both audio and video fade out correctly. However, when switching back to the scene with Game Capture with Capture Audio (BETA), the video fades in correctly but the audio is silent until scene transition is complete and then it kicks in at full volume.

When I create two separate sources - Game Capture without Capture Audio (BETA) + Application Audio Capture (BETA), the audio fades in correctly.

[Fenrirthviti]

How exactly are you validating the audio fade? Are you monitoring the source? Audio monitoring does not include fade during scene transitions.

[emomilk]

Audio monitoring does not include fade during scene transitions.

It does when using two separate sources as I described in the "Anything else we should know?" section. In that scenario the audio source is registering as soon as the transition starts (dancing bars). When using a single source for both video and audio, the audio source is visible but not registering (no dancing bars) until the fade is complete. I also made a recording and played it back for confirmation.

[Fenrirthviti]

Audio monitoring will never have a fade, which is why I asked.

I've confirmed this does not fade in as expected.

[emomilk]

Then I must have misunderstood what you meant by "audio monitoring does not include fade". I assumed you meant whether the audio source bars in audio mixer are dancing during the fade or not . Thanks for confirming the issue.

[Fenrirthviti]

Ah, no. The OBS feature of "Audio Monitoring" (in Advanced Audio Properties, or the Headphone icon in the mixer). People often use it to test audio before going live/recording, and mistake that it is the final output.

This does seem to be an issue specific with the game capture source, likely due to how we handle the active state on transition, potentially to avoid hook collisions.

[emomilk]

Ah, I see. Thank you for explaining that, I was unaware of this feature.