Fit Audio Description Into Real Dialogue Gaps — Free
A description that reads well can still collide with dialogue. Measure each silence and compare it with the speaking time of your draft before recording.
The proof surface
Caption speed tools measure text on screen; this instrument fits an additional spoken track into measured gaps. Positive spare time in one cue cannot rescue an overfull cue elsewhere.
Why the flat version breaks
Averaging the gaps
A roomy opening does not create time during a crowded exchange.
Counting silent punctuation
Punctuation affects delivery, but it is not another spoken word; rehearse the line.
Erasing important sound
Do not treat footsteps or an audible alarm as disposable silence.
How to work the cue envelope
Listen to the final edit, not an earlier cut. Subtract dialogue tails and essential sound effects before entering gap seconds. Keep one cue per line so a long silence cannot conceal a collision in another scene.
Count the words you will actually record, including numbers as spoken. A twelve-word sentence at 120 words per minute takes six seconds in this estimate; pronunciation and delivery still need a timed read.
Use your own read-through speed rather than a fast default chosen to make everything fit. The starter has a five-second station-sign gap with fourteen words, leaving a two-second deficit.
Shorten or relocate the flagged descriptions, then listen with the dialogue. The total spare time is only a workload summary: every individual cue must fit before you call the track ready.
What the cue envelope replaces
| Question | Before | Visible working |
|---|---|---|
| Averaging the gaps | A roomy opening does not create time during a crowded exchange. | Count the spoken draft |
| Counting silent punctuation | Punctuation affects delivery, but it is not another spoken word; rehearse the line. | Set a tested delivery pace |
| Erasing important sound | Do not treat footsteps or an audible alarm as disposable silence. | Rewrite the negative cues |
A local arithmetic aid replaces hand calculation, not expert review. No paid AI service is needed.
Run it on the samples, right here
FIRST-LOAD
Input is processed locally. A state link encodes your inputs in its URL: share only non-sensitive rows. Browser history, clipboard and anyone receiving the link may retain it. Optional AI use below leaves this device; it is not required.
This estimates narration duration, not accessibility compliance or comprehension. Review the mix with an audio describer and blind or low-vision listeners.
Data note: Everything runs in this browser tab on the cue envelope: your cue | gap seconds | spoken words stays on this device, nothing is uploaded, and the reading is rebuilt only when you press run.
Go deeper: the companion app files the same reading as a paper ticker strip
The article demo above runs without limits. The companion app keeps a local history, exports the rows as CSV, prints the cue envelope reading, and holds your drafts on this device — one free run, then $ 4 one-time for the layer that keeps filing.
The cue envelope reading is complete for free. The optional $4 layer adds print, row CSV and the last five local reading summaries; it does not add hidden answers. Checkout is not configured yet; the article demo remains unlimited.
Open the fit audio description into real dialogue gaps companionBoundary
This estimates narration duration, not accessibility compliance or comprehension. Review the mix with an audio describer and blind or low-vision listeners.
What this is built on
- Method: Use your own read-through speed rather than a fast default chosen to make everything fit. The starter has a five-second station-sign gap with fourteen words, leaving a two-second deficit.
- All sample records are invented examples. The app does not fetch measurements, policies, files or personal records.
- Google’s official pricing page, fetched 2026-09-27, lists free-tier access including AI Studio. Optional formatting only; limits and availability can change. Free-tier content may be used to improve products. Never paste private records there.
Before: A roomy opening does not create time during a crowded exchange. After: the cue envelope shows the working beside each named row so the reader can change the assumption and inspect the consequence.
Optional AI formatting, not calculation
For this cue envelope, use the free AI Studio interface only if available to you, with no paid API key. Manual entry completes the same workflow for free. Supply only fictional or non-sensitive notes. Review its output against the source; never paste unresolved questions into the numeric rows.
Format my non-sensitive notes for a cue envelope. Return plain rows only: cue | gap seconds | spoken words. Preserve supplied quantities exactly. Do not guess missing values; list questions separately. Do not calculate or add advice. I will check every row before pasting into the local tool.
Accepted schema: cue | gap seconds | spoken words. No AI response is executed as code.