As the title says, I saved a simple edit, basically brand new in Waveform, added a
StepClip and a bunch of channels but didn’t hook any samples or anything else up to the Track.
I would think this was valid for any type of edit saved from Waveform regardless if it contains anything specific.
The little bit of irony (for me) in the screen shot is the comment;
// is it ever OK for this to be invalid?