In VSE I have inserted a sound clip and added two custom properties. This is purely so I can bake different frequencies as F-Cruves which greatly helps with aligning video with music.
I want those two F-Curves to be always visible in the Graph Editor. There seems to be an option that should do exactly that. In Graph Editor on the bottom bar (with menu) at the very end there is a button with a ghost icon (a second one in that row, first one is to show channels from not visible objects) that has a tooltip saying:
Create snapshot (Ghosts) of selected F-Curves as background aid for active Graph Editor bpy.ops.graph.ghost_curves_create()
However this button is disabled and there is no indication why. I have my sound clip selected, with two custom properties keyed and F-Curves for those selected.
How do I make snapshot of those baked sound F-Curves?
P.S. If it makes any difference I have Blender v2.77