I can't figure out how to record blendshapes with ARKit Face Actor

Hi,
I’m trying to record blendshape animations from my face using an iPhone. I’m connecting directly to the Unity Editor using ‘Connections’. I can see the blendshape sliders under the ARKit Face Actor moving as I move my face so this part is working fine.
I’m trying to record these movements using Take Recorder. I just can’t get it to work.
I’ve created a new game object with a Take Recorder and a Playable Director component. I’ve linked the Take Recorder to the ‘Face Device’ Capture Device. In Timeline I create a new Take Recorder Track. When I drag and drop the Take Recorder that I’ve just created into the Take Recorder Track it says ‘A Playable Graph is being directly or indirectly evaluated recursively’.
If I create a Take Recorder on another game object and try to use that (again linking it to the capture device and the Face Actor) it says ‘TakeRecorderTrack (Take Recorder Track) is referencing the same TakeRecorder component as the one in which it is playing. UnityEngine.Debug:LogWarning (Object)’
Can you please advise what I’m doing wrong.
Many thanks,
Ian.

The LiveCapture package is better addressed in this forum.