Audio Using "DSP Clock" Update Mode on a Director with Unity Audio Disabled

The project I am working on uses Wwise for audio, and has the Unity audio disabled. We are encountering an issue in builds where timelines are not playing properly, and I suspect it is because they have the update mode set to "DSP Clock" instead of "GameTime"



My theory is that the DSP Clock is not updated because Unity Audio is disabled, but I cannot find confirmation of this anywhere in the Unity documentation.

Is this the expected functionality?