How should a lyric editor distinguish a constant timing offset from drift?

[ailutgenerator]

How would you explain a constant lyric-timing offset versus progressively growing drift to someone using a browser editor for the first time?

Consider a hypothetical case: the opening line looks slightly early, a middle section feels much further out, and the last verse includes an extra pause. A single global offset can move every timestamp, but that does not establish that the recording version and text still match. It would be misleading for the interface to imply that one adjustment fixes every possible alignment problem.

I am associated with AI LRC Generator at https://ailrcgenerator.online/ . The tool supports recognized or supplied lyrics, editable words and line timestamps, an offset adjustment, playback previews, and lyric/subtitle exports. Editing and exports are free; automatic audio processing requires a verified account and credits. This is an AI-assisted, project-associated product-design question, not a report of a user study or a promise of perfect transcription.

Which interface would make the distinction clearer?

• A short explanation beside the offset control, with a reminder to replay the beginning, middle and ending.
• A comparison checklist asking whether the same recording version, introduction and repeated sections are being used.
• A reversible adjustment with a clear undo path, followed by explicit confirmation that local line edits may still be needed.

I would also distinguish a successful export from a successful listening check in the destination player. What wording would help beginners understand that difference without overwhelming them? An example using invented practice lines would be preferable to sharing somebody's private audio or copyrighted lyrics.