Final answer:
The 'heal separation' command in audio editing is used to repair separated, contiguous digital audio clips, provided their positions haven't changed since the separation.
Step-by-step explanation:
The subject in question refers to a function within a digital audio workstation (DAW), specifically, the 'heal separation' command. This command is used in audio editing, typically when working with digital audio clips. The 'heal separation' function allows the user to repair or rejoin clips that have been split or separated, on the condition that these clips are contiguous, meaning they directly follow each other, and their start and end points remain unchanged from the point of separation. If the clips have been moved or their relative positions have been altered, this function may not work as intended. Generally, this feature is used to undo accidental edits or to revert to a previous state of the audio project.