DualVox User Guide

For version 1.0.29 and later in this series
Last updated: October 20, 2026
中文 · EN · 日本語 · 한국어 · DE · FR

DualVox is a mobile recording tool for talk-through creators. Show the scene. Speak. Done. You appear on camera, the scene fills the frame, and speaking over a real place, a photo, or a clip produces a vertical video.

1. What DualVox does

2. Before you start

2.1 Permissions

Grant what the system asks on first use, or check Settings → Permissions & system:

• Camera: dual / single camera, still photos
• Microphone: talk-through audio, cartoon lip-sync, teleprompter pace-follow
• Speech recognition / on-device models: add captions on a finished clip. Audio is not uploaded. The system may download a language pack once
• Photos / storage: save videos and photos, import scene media
• Location: place on the info watermark, or weather for the Weather card; neither can be edited. Without permission, place and weather details are hidden

2.2 Device differences

• Both cameras at once: only some devices can run front and rear cameras together. You can still open dual-cam; it may fall back to rear-only and explain why. A live front-camera composite may be unavailable.

3. Two entries

Opening the App lands on the capture screen. Every launch starts on Talk-through. Switch at the bottom anytime:

• Discover: Snap records immediately. Tools covers video edit, follow-record, Extract text, AI script, teleprompter, and voiceovers. Drafts keeps unfinished edits. Script library and shooting tips sit below.
• Talk-through: rear camera on the object or space, front camera on you — unboxings, store visits, street interviews. You can also take stills here.

4. Discover

1. Tap Discover and browse recipe cards. The subtitle is “Show the scene. Speak. Done — a talk-through tool built for creators.”
2. Open a card and read How to shoot. Most scenes also have script templates. Swipe left or right, then tap Use “xxx” script to apply one to the teleprompter (a checkmark appears if it is already applied). If the library is full, you can open script management.
3. Snap (street, travel check-in, store visit, talking to camera): apply a script if you want, then tap Start recording. On the left you can turn on fill light, torch, stabilization, info watermark, the grid, and the publish safe zone.
4. Tools: video edit (import, trim, split, captions, export — free, no quota); follow-record (add several clips or photos, then talk); Extract text (on-device, copy the result); AI script (members, 40 per day; add to the teleprompter or turn into a voiceover); teleprompter; voiceovers (type a script for on-device or cloud narration).
5. Drafts: unfinished or exported edit projects, with duration on the cover. Open to continue; long-press to delete.
6. Script library: ready-made scripts you can apply to the teleprompter and shoot.
7. Shooting tips: short notes on the safe zone, grid, teleprompter, watermark, and stabilization, then try a scene.

Edit and talk over media

• In the editor you can change layout templates, still or animated scene backgrounds, and borders, plus overlay / split. Free: basic templates, still backgrounds, and basic strokes. Animated backgrounds, extra templates, and premium borders are membership.
• Tap Next to talk over the media. The follow-record screen has Cool Watermark and the same screen fill light as Talk-through on the left, audio / mic / teleprompter on the right, and a switch to mix the clip’s system audio into the file (off by default). Speaker playback of the clip is muted so it does not leak into the mic; plug in headphones if you need to hear the source while you talk.

5. Talk-through

1. Switch to Talk-through and allow camera and microphone.
2. Before recording you can set layout (overlay / split), presenter position and size, window shape, looks and effects, and the teleprompter script.
3. Optionally turn on the grid, publish safe zone, info watermark, smart stabilization, or fill light / torch.
4. The bottom timer capsule sets countdown (off / 3s / 5s; this is remembered). Tap the shutter. Tap again during countdown to cancel.
5. While recording you can drag the overlay, open presenter / picture settings, and flip the camera. Tap the shutter again to stop.
6. When processing finishes, the file is saved to Photos.

On devices that cannot run both cameras: you can still open the screen and see a notice; you may only get the rear camera. Follow the on-screen explanation.

6. Picture, presenter, and layout

6.1 Picture panel (looks / effects)

• Looks: 19 filter styles, available to everyone. Rear looks apply to Talk-through / single-cam scenes.
• Effects: Off, vignette, sharpen, grain, and more, which can stack with looks; intensity is adjustable. Available to everyone.
• When both cameras are available, you can set them separately.

6.2 Presenter

• Switch at the top between Live and Cartoon. Live is no longer in the horizontal avatar list.
• Live: window shape, border color (first swatch “None” turns the border off), border thickness, and presenter size. Shape and border apply only to overlay + live presenter. Split and cartoons are exceptions. Circle, rounded, square, and rectangle (portrait 3:4, can sit flush to the edge) are free; cloud, heart, drop, flower, and more are membership.
• Cartoon: cartoons 1–4, women 1–4, men 1–4, and animals such as cat, dog, rabbit, bear, panda, fox, pig, penguin. Free: cartoons 1–4. The rest are membership. You can turn on lip-sync so the mouth opens with microphone level.
• Layout:
  • Overlay: full-screen main picture + a small window you can drag, reshape, and resize. Talk-through defaults to overlay.
  • Split: top and bottom halves; drag the divider (snaps to 1:2 / 1:1 / 2:1); flip swaps the two.
• Include presenter (device-dependent): whether the front camera is composited. On unsupported devices the switch is disabled.

6.3 Suggested uses

• Talk over a clip or photo: Follow-record in Tools, then appear on camera.
• Unboxing / store visit: Talk-through or Store visit — rear on the product, front on your face.
• Travel check-in: single-cam instant record + date/place watermark.
• Prefer not to show your face: cartoon or animal + lip-sync.

7. Watermark, stabilization, and light

7.1 Info watermark

• The left watermark icon opens a right-hand Cool Watermark drawer. The mark appears on the preview only after you pick a look. If it is already on, tapping only toggles the drawer. Close it with the small X on the card.
• Nine looks: Classic check-in (free), Film body, Big time, Ticket stub, Masthead, Neon lightbox, Minimal coords, Camera EXIF, and Weather. You can preview the paid looks; recording them needs membership. Ticket / masthead / neon / coords accept one optional custom line; it does not replace the place. Weather uses location to fetch the current temperature from Open-Meteo and cannot be edited.
• Drag a card anywhere. When you touch it, a small close control in the top-right becomes clearer; tap it to hide the card.
• Place is filled by system location and cannot be edited. Without location permission there is no place; other recording still works.
• Travel check-in turns Classic check-in on automatically.

7.2 Smart stabilization

• Available on the left in dual-cam and single-cam.
• A banner says “Smart stabilization on”. Preview may lag slightly on some devices because of the capture buffer. Turn it off anytime.

7.3 Fill light and torch

On the left in single-cam / dual-cam and on follow-record you can turn on screen fill light; dual-cam also has the rear torch. Fill light raises screen brightness and leaves a warm frame around the stage; it is restored when you leave.

8. Teleprompter

The teleprompter is for Talk-through, instant scenes, and the follow-record screen. Scripts stay on the device (up to 10). The scrolling layer is only for you and is not burned into the video.

8.1 Manage scripts

1. Settings → Recording → Teleprompter opens the script library: add, rename, edit, or delete.
2. Applying a scene template writes it into the library and makes it current. If a script already exists, you can start a new one or overwrite the current one.

8.2 Capture-screen panel

1. Tap the teleprompter icon on the capture screen.
2. Script tab: view the current script, switch scripts, type / paste / clear. “Show teleprompter” shows the prompt when you start; switch to “Turn off teleprompter” to skip it without deleting the script.
3. Style tab: size, scroll speed, background opacity, and pace-follow: scroll speeds up or down with microphone level; it slows clearly when you are silent.
4. Close the panel (X or tap outside) to save.

8.3 While recording

1. If the current script has text and the control is “Show teleprompter”, starting a take shows the prompt automatically and starts scrolling.
2. Tap the prompt to pause / resume; swipe up or down to scrub.
3. Tap the small close button at the top left, or the teleprompter icon again, to hide the layer (progress is kept so you can continue from there).

9. While recording

10. Videos, photos, and the library

• Videos and photos save to the system library and appear in My clips (video and stills). Duration shows on the cover.
• The three-dot menu on a clip: Add to edit, Follow-record, Delete clip.
• The capture-screen library button opens recent items.
• Brand end card: about 1.5 seconds of DualVox card after you stop. Free accounts can pick a look in Settings → End card; members can turn it off or use their own video (up to the first 5 seconds).
• The info watermark (Cool Watermark) is separate from the brand end card: you turn the former on on the capture screen, and it is in the video.
• After export you can share from the system library / share sheet to short-video apps or elsewhere.
• Captions / transcription: in Tools → Video edit, recognize speech, edit lines, and export a burned-in video. For text only, use Extract text and copy the result. All on this device; audio is not uploaded. Free transcription is up to 10 minutes. Settings can change recognition language; the engine (system dictation or SpeechAnalyzer) is iOS-only.

11. Settings

Open Settings from the capture screen. Main groups:

11.1 Account and membership

• iOS: Sign in with Apple. After sign-in, tap the account row to copy your account ID.
• Android: in Simplified Chinese, sign in with a mainland China mobile number before membership. Switch the app language to Chinese first if you are on another language.
• Membership and the membership agreement.

11.2 General

• Language: follow the system, or force Simplified Chinese, Traditional Chinese (Taiwan / Hong Kong), English, Japanese, Korean, German, or French. The interface and this guide follow the choice.

11.3 Recording

• Quality: 720p / 1080p for everyone (talk-through).
• Teleprompter: opens the script library to add, edit, or delete on-device scripts (up to 10). The capture-screen panel handles switching and style. Not in the video.
• Caption language (iOS and Android): automatic by app and system language, or a specific language. Android may download an on-device model the first time you use a language. Caption engine (iOS only): system dictation or SpeechAnalyzer.
• End card: DualVox card after you stop; pick a look. Always on for free accounts; members can turn it off or use their own video.
• Take length: recording and follow-record are free up to 1 minute per take, then auto-stop and save, with no weekly count; members unlimited.
• Extract text: free up to 10 minutes; members unlimited.
• AI script: members only, after sign-in, 40 times per day. Generated scripts can go to the teleprompter or become a voiceover.
• Cloud narration: members get cloud multi-voice audio, about 25,000 Chinese characters per month. Personal voices are membership-only and can be bought on demand; non-members cannot buy them.
• Video edit: import, trim, captions, and export are free, with no quota.

11.4 Permissions and system

Opens system settings for camera, microphone, photos, location, speech recognition, and similar.

11.5 Help, legal, and about

• Help: user guide, feedback, rate the App
• Legal: user agreement, privacy policy, personal information and third-party lists
• About: clear cache, check for updates, About DualVox

12. Account and membership

• On iOS you sign in with Apple, or subscribe with your Apple ID first and sign in later — the subscription then attaches to that account.
• Mobile sign-in is Android only, in Simplified Chinese, and mainland China numbers only, with an SMS code. iOS does not offer phone sign-in.
• Free: Discover / Talk-through, teleprompter, 720p / 1080p, unlimited video edit, Extract text up to 10 minutes, recording and follow-record up to 1 minute per take (no weekly count), all looks and effects, circle / rounded / square / rectangle windows, cartoons 1–4, basic templates and still backgrounds, and Classic check-in watermark. Videos include a DualVox end card (several looks).
• Membership: all window shapes, all cartoon / character / animal avatars, Film body / Big time Cool Watermarks, animated backgrounds and extra templates / borders, unlimited Extract text length, AI scripts (40 per day), unlimited take length, the option to turn off the end card or use a custom video, cloud multi-voice narration (about 25,000 Chinese characters per month), and buying personal voices on demand after membership. Follow the in-app membership screen.
• iOS payment is App Store auto-renew (yearly / monthly). On the membership screen you can Restore purchases and Manage subscription / cancel auto-renew. After switching devices, restore first. On Android, after Simplified Chinese mobile sign-in, you can buy the same yearly / monthly plans with Alipay. It is a one-time purchase and does not auto-renew.
• See the Membership Agreement for more terms.

13. FAQ

Why does every launch open Talk-through?

By design: a cold start always opens Talk-through and does not remember the last entry. Switch to Discover at the bottom anytime.

Where did Default capture mode / default presenter go?

They were removed from Settings. Presenter, layout, and looks reset each visit. Adjust them on the capture screen.

Can I subscribe without signing in?

On iOS, yes, with your Apple ID. Signing in afterwards with Apple helps sync across devices. Android needs sign-in in Simplified Chinese with a mainland China mobile number, then Alipay.

Talk-through won’t start while the system is recording the screen?

If the system Control Center screen recorder is running, dual-cam talk-through cannot start until it stops.

No live overlay / dual-cam is greyed out?

When the device cannot run both cameras, the Talk-through layout defaults to Single cam on first entry. You can still switch to Split or Picture-in-picture with a cartoon avatar, or use a Snap scene / Follow-record in Discover.

Stabilization makes the picture lag?

Smart stabilization needs a capture buffer, so preview can be a bit slow. Turn it off when you do not need walking stability.

Why can’t I type the watermark place?

Place comes from system location so it reflects where you actually shot. Turn off place or the whole info watermark; you can also tap the small close control on the card.

The teleprompter is not in the video?

That is by design: it is only for you to read while shooting. To put words on the video, use Tools → Video edit or Extract text.

How do I use AI script? Is it a member perk?

Discover → Tools → AI script. After you sign in and subscribe, enter a topic or notes, or hold to talk, to generate a talk-through script. Default spoken length is about 30 seconds; you can change length and tone. Add the script to the teleprompter or turn it into a voiceover. 40 times per day. Extract-text results can tap “Use for a script”. In the teleprompter you can also polish or expand an existing script; that counts toward the same daily limit.

I have a script but nothing appears when I record?

Make sure the current script has text and the control is “Show teleprompter”. Switching to “Turn off teleprompter”, or deleting the current script in Settings, hides the prompt. You can also tap the teleprompter icon after you start.

Pace-follow is not tracking my reading?

Pace-follow uses microphone level, not speech-to-text alignment. Check microphone permission, keep background noise down, and confirm pace-follow is on in the Style tab. Scroll slows when you are quiet or speak softly.

The video says DualVox?

The DualVox name appears in the end card after you stop. Free accounts can pick a look in Settings → End card; members can turn it off or use their own video. Info-watermark styles may still show DualVox as part of the stamp.

Audio is quiet or there is no lip-sync?

Check microphone permission and system mute. Cartoon lip-sync needs Lip-sync on in presenter settings, and your voice needs to be above the noise floor.

The follow-record file has no sound from the clip?

Source audio is off by default. Turn on Keep system audio on the follow-record screen. Speaker playback of the clip is muted so it does not leak into the mic; use headphones if you need to hear it.

14. Feedback and legal

• Support: DualVox Support
• Website: https://dualvox.mediapea.com/
• Feedback: [email protected]
• User Agreement
• Privacy Policy
• Membership Agreement
• Personal Information Collection List
• Third-Party Sharing List

This guide describes DualVox as it ships today. Copy and benefits may change with versions. If this page and the App disagree, the App wins.