Thanks for your reply.
I have uploaded a sample project in Feedback Assistant: FB16546544
When doing the sample I found that the problem isn't the usage of kCGImageSourceDecodeToHDR, since kCGImageSourceDecodeToSDR results in the same problem.
The usage of non-nil options for the CGImageSourceCreateImageAtIndex demonstrates the issue.
You will see in the sample :-)
rued
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The problem with outputVolume is that you only get notified when the volume change.
If the volume is 0 and you push vol.down, nothing will happen. Or if volume is 1, and you push vol.up, nothing will happen.
Previously using AVSystemController_SystemVolumeDidChangeNotification and SystemVolumeDidChange in combination, fixed that.
So we need a more robust solution that outputVolume