How long does it take to add AI narration to a 20-slide deck?
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For a reasonably clean deck, adding AI narration to 20 slides typically takes about 60 to 120 minutes.
The biggest driver is script readiness. If slide copy is already concise and structured, narration generation is fast. If the team is still rewriting messaging while narrating, timing expands quickly.
A realistic breakdown looks like this:
- script cleanup: 20 to 45 minutes
- voice generation and timing: 20 to 40 minutes
- QA and corrections: 15 to 35 minutes
Multilingual versions or strict pronunciation requirements can add additional review time, but the base process remains much faster than full manual recording workflows.
To keep turnaround predictable, maintain a reusable deck structure and voice settings profile. That reduces setup overhead each time a new update or campaign goes live.
If your team uses a reusable voice profile and script template, repeat projects are usually faster than the first pass. Standardization is what turns quick experiments into predictable production timelines. Quick reference: Most teams can narrate a 20-slide deck in 1 to 2 hours, with script quality as the main timing variable.