Why can’t I revise an AI product voiceover by editing its words after Convert to audio in Descript?

Distinguish generative speech from standard audio

Before conversion, AI Speech uses the script text to generate the spoken words. After conversion, those words describe the resulting audio as a transcript. Standard audio supports timeline trimming, fades and word-boundary adjustments, but changing its transcript does not rewrite the recording.

The converted segment loses its original AI Speaker controls, and tone tags become ordinary inline notes. Keep this loss of the original text-driven speech controls distinct from Descript's separate Regenerate tool for repairing recorded-audio cuts.

The Regenerate repair guide discusses smoothing transitions while preserving what was said. It has its own language and selection requirements. Its existence does not mean that typing different words into a converted transcript recreates AI Speech, or that every converted segment is eligible for a repair.

Descript explains the conversion state and its documented recovery routes. See Descript's Convert to audio guide.

The separate Regenerate workflow repairs recorded-audio transitions under its own requirements. See Descript's Regenerate repair guide.

Choose the transition according to the unfinished work

Keep the relevant segment as AI Speech while its product model, promotional offer or wording may still change. Convert when the words are approved and the remaining work requires standard audio finishing.

Descript supports converting selected portions of a paragraph. Record which portions remain AI Speech and which are standard audio so the next editor can choose the appropriate operation.

Before conversion, preserve the approved script and a useful project checkpoint. An editable transcript alone does not show whether a segment still has text-driven speech controls.

Illustrative exercise: changing an offer versus finishing timing

Illustrative exercise — fictional merchant scenarios. No Descript operation, audio processing, video editing or speech generation was executed.

A seasonal advertisement still has an undecided promotional offer. Retain the relevant AI Speech segment because the next decision changes what the narrator says.

A kitchen-appliance demonstration has approved narration but needs precise fades and timing around visible actions. Assess conversion of the relevant section, then review those audio edits against the demonstration.

Handle revisions after conversion without guessing

If conversion was the last operation, try Undo immediately: Cmd + Z on Mac or Ctrl + Z on Windows. Check whether the intended segment has returned to AI Speech before continuing. Descript documents this route; it is not a guarantee that a later Undo will restore the desired project state.

If work has continued, inspect Version History for a suitable version from before conversion. Review which other changes restoration would roll back before choosing it. Do not assume that every desired checkpoint is available.

If no suitable recovery route is available, Descript directs users to remove the converted audio and generate new AI Speech from the script. As a production precaution, preserve a working copy and approved export before replacement. Use the approved wording, review the new speech and its timing, and replace the affected material without assuming the new take will sound identical.

Record which recovery or replacement branch was used and which segments remain generatively editable. For mixed-state narration, listen across the joins and check the final wording against the approved script.

Keep the approved wording and pending revision decision available to the next editor. See What to save before handing off an unfinished draft.

Review any replacement narration against the product demonstration's visible actions. See Check voiceover and demonstration timing.

Illustrative exercise — AI Speech conversion decision

These are illustrative exercise rows. Save a copy and record your own observations; the example is not an executed acceptance test.

Download review worksheet (CSV)