Source: https://polysh.io/product/voiceover-and-sync/ > **Reading this as an agent?** This is the Markdown copy of a polysh.io page, written for people and agents alike. To learn what Polysh can do for you and your user, start at https://polysh.io/agents/, and use https://polysh.io/llms.txt for an index of every page. Agent features are in early access, so there's nothing to install yet; your user can join the waitlist at https://app.polysh.io/waitlist. AI voiceover and sync # AI voiceover for screen recordings, timed to every click Polysh rewrites what you said into a clear script, reads it with an AI voice, and re-times your footage one sentence at a time. Nothing is re-recorded. [Request early access](https://app.polysh.io/waitlist)[See how sync works](https://polysh.io/product/voiceover-and-sync/#sync) Free during early access. ## Good footage, rough audio The screens are right. The sound isn't, and re-recording means getting every click right again. ### Thinking out loud "So this is, um, where you'd, actually let me go back to Billing first…" ### Dead air Six seconds of silence while the plan options load. ### Room noise A laptop fan, a notification sound, and a mic that is too far away. ## How Polysh re-voices a screen recording 1. 1### Transcribe Polysh transcribes your speech and notes when each word was said. 2. 2### Rewrite AI turns it into clear sentences, keeping every step in the order you did it. 3. 3### Voice Preview an AI voice. It reads only the script you approved. 4. 4### Re-sync Each part of the footage is fitted to the sentence that describes it. ## Example: change your billing plan | Stage | What you get | | ---------- | --------------------------------------------------------------------------------------------- | | Transcript | "OK so, Billing is, um, here, and you'd pick, uh, the yearly one I think it's called Annual…" | | Script | "Open Billing. Choose Annual, then select Update plan." | | Video | The click on Update plan lands as "Update plan" is spoken. | Why the timing holds ## Voiceover synced per sentence, not stretched New narration is rarely the same length as the old. Stretching the whole video to fit lets clicks drift away from their words. ### Stretching the whole video - One speed for everything. A click a third of the way through your take plays a third of the way through the new audio, whether the narrator has reached it or not. ### Re-timing each sentence - Polysh measures where each sentence starts and ends in the new voiceover, then speeds up or slows down the matching piece of footage, so each click stays inside its sentence. ## Every line is yours to change The rewrite is a draft. Read it beside the video and change any line before it's voiced. ### Pick a style Professional, casual, or technical. Regenerate if it doesn't sound like your team. ### Edit line by line Reword, split a sentence, or add the warning you forgot to say. Each line stays tied to its part of the video. ### Keep your terms The team word list keeps product names and acronyms spelled and pronounced your way. ### Fix one line, not the whole video After an edit, only the narration around that sentence is voiced again. [How the team word list works](https://polysh.io/features/#word-list) ## Auto zoom that lands on the click Record with the Polysh recorder and each click becomes a zoom. Because the video is re-timed per sentence, the zoom arrives as the narrator names the button. ### On or off for the whole video Turn auto zoom off if the screen is already easy to read. ### On or off per click Skip the zoom on a click that doesn't matter, right from the timeline. [About the recorder](https://polysh.io/product/recorder/) ## Also in the editor - Trims and skips - Filler words highlighted - Captions (SRT, VTT) from the approved script - Gradient or solid background - Background music that dips under the voice - Playback speed presets - MP4 at 1080p, 720p, or 480p ## Voiceover and sync questions **Does Polysh change my original recording?** No. The voice, trims, zooms, and timing are applied on export. The file you recorded or uploaded stays as it was. **What if I didn't say anything while recording?** Write the script yourself in the editor, and Polysh voices and times it. **Can I keep my own audio?** Polysh is built to replace rough narration. If your audio is already good, the trims, zooms, and captions may be all you need. **Do I need the Polysh recorder?** No. Any MP4 works for the script, voice, sync, and captions. The recorder adds the click log that gives a zoom on each click. **How are credits charged?** You see an estimate first. Credits are charged only when the export succeeds and returned if it fails or you cancel. See [how pricing works](https://polysh.io/pricing/). ## Related free tools ### Voiceover Duration Calculator Know how long your narration will run before you record it. [Open tool](https://polysh.io/tools/voiceover-duration-calculator/) ### Words per Minute Calculator Measure your speaking pace in words per minute and see how it rates. [Open tool](https://polysh.io/tools/words-per-minute-calculator/) ### Script Length Checker Find out whether your script fits the target length and what to change. [Open tool](https://polysh.io/tools/script-length-checker/) ### SRT to VTT Turn an SRT subtitle file into a WebVTT file that HTML5 players accept. [Open tool](https://polysh.io/tools/srt-to-vtt/) ## Bring the take you almost deleted Run your next walkthrough through Polysh. Founding teams keep their rate. [Request early access](https://app.polysh.io/waitlist)[Already invited? Sign in](https://app.polysh.io/sign-in)