Editing the transcript
Can I undo a cleanup — even long after I made it?
Yes. Undo and redo work as normal, and separately, every cut and mute is listed under Recent edits with its own Restore. Because Cast never overwrites your recording, you can put back one filler word you removed twenty edits ago without losing anything you did since.
This is the practical payoff of a non-destructive model. In tools that bake AI cleanup into the audio file, an over-aggressive pass is a problem you solve by starting over. Here it is a problem you solve by clicking Restore.
The same is true after an export: the export is a rendered copy, and your project still holds the original recording plus your edits.