Automatic rythmo band: transcription, timing and characters
Want a rythmo band without placing every line by hand? Import your video into Voxdub. Transcription, line timing and character detection run automatically. Then you review and adjust. Here is how it works, and what our measurements say about speed and accuracy.
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How it works
1. Import
Drag your video into Voxdub, right from the browser. No install.
2. Let the band generate
Voxdub transcribes the dialogue, places each line on the picture and assigns lines to characters. You do not have to type everything.
3. Review, adjust, record
Correct the text, check the characters and adjust lines where needed. Then record your voices following the band.
Speed and accuracy, as we measured them
Typically, the band is ready:
- video under 10 minutes: in under a minute (median 0.6 min; 1.7 min or less in 9 cases out of 10)
- video of about 20 minutes: in about 5 minutes (median)
- 2 to 3 hour film: in about 35 minutes (median)
Timing: median offset 102 ms (about 0.1 s) at line start, within 0.33 s for 9 lines out of 10; 0.59% of lines are more than one second off.
Speakers: 90% of lines assigned to the right character on our test clips, lower on scenes with many characters.
Method: speed measured in production on 61 complete automatic runs (transcription, timing alignment, speaker detection, queue wait included), last 60 days as of 2026-10-25, including under 10 min n=45, about 20 min n=5, 2 to 3 h n=8. Timing measured 2026-10-20 on 17 real dubbing clips (506 lines); speakers measured 2026-10-18 on 26 clips (673 lines). Text accuracy is not measured here: please proofread.
What is still up to you
Proofread the text
Transcription gives you a working draft, not a final text. Proofread each line. Fix misheard words, proper names and punctuation.
Check the characters
Check which character each line is assigned to, especially on scenes with many characters. Correct the assignment where needed.
Adjust the lines
If a line's timing does not suit you, adjust its start or end on the band. Then fit the text to the length.
Who is it for?
Adapters
Start from a band that is already timed and spend your time on adapting the text.
Detectors
Get a first pass of lines and characters, then check it instead of typing everything.
Voice actors
Rehearse and record on a band that is already timed.
Fandub teams
Prepare the band for a clip and share the characters across the team.
Frequently asked questions
How long does it take to generate a rythmo band?
In our production measurements, the band is ready in under a minute for a video under 10 minutes (median 0.6 min), in about 5 minutes for a video of about 20 minutes, and in about 35 minutes for a 2 to 3 hour film (medians). These times include the queue wait.
Are the lines well timed?
In our measurements, line starts have a median offset of 102 ms (about 0.1 s), and land within 0.33 s for 9 lines out of 10. Only 0.59% of lines are more than one second off. You can adjust every line on the band.
Are the characters recognised?
Yes. Each line is assigned to a character. On our test clips, 90% of lines go to the right character. The rate is lower on scenes with many characters: check the assignment and correct it where needed.
Do I need to proofread the text?
Yes. Transcription gives you a working draft, and we do not publish a measure of its accuracy. Proofread each line before you record or export, especially proper names and noisy passages.
Which exports are available (DETX, BWF, SRT)?
You export the band as DETX (lines, timecodes and characters), SRT or ASS. The dubbed audio exports as BWF, and the video with the rythmo band burned in exports as MP4.
How does the 7-day trial work?
Create an account and start the 7-day trial. Every feature is included, including automatic band generation. After the trial, Voxdub Pro costs €12.99/month or €99/year. You can cancel at any time from the billing portal.
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Ready to try it?
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