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Phone audio guide

Caption a phone video or a conversation around you

A phone can hear more than one kind of audio. A lesson playing inside an app, a television across the room and a person beside you do not use the same capture path. If captions are empty or describe the wrong speaker, check which source the feature is listening to before changing languages or installing another app.

By StreamTranslate · Updated

Use device-audio captioning for media playing on the phone and microphone captioning for nearby speech, where your device supports those modes. For a remote broadcast audience or supported desktop tab translation, choose a separate delivery workflow.

Choose the source before the caption tool

Match the source to the capture path
What you want to understandInput to look for
A video playing in the phoneDevice or app audio
A person in the roomMicrophone or conversation mode
A television or computer speakerNearby microphone capture, if no direct route is available

Direct audio avoids adding the room’s noise to the source. If you must use a microphone near another speaker, test the distance and volume rather than assuming the phone hears the same clear sound you do.

Find the appropriate phone settings

Apple’s iPhone guide places Live Captions under Settings, Accessibility and describes separate Microphone and iPhone Audio controls. Availability depends on the device, language and region. Android has its own accessibility caption features and device-specific instructions.

Use the official guide for the phone in your hand. The newspaper article linked below introduces the practical idea, but a device’s current controls are the better reference for setup. Do not assume that a menu shown on one operating-system version appears unchanged on another.

Test media and room speech separately

  1. Play a short video with one clear speaker and select the phone-audio mode.
  2. Pause the video and check whether the caption text stops following that source.
  3. Switch to microphone capture if your device offers it.
  4. Ask someone nearby to read a different sentence.
  5. Confirm that the new words come from that person rather than the paused video.

This test is useful when the caption box looks active but contains unrelated words. Changing the source deliberately gives you a clear explanation of what the phone is listening to.

Make the caption view useful for the whole session

Check the text at the size and distance you normally use. Move the caption area away from lesson demonstrations, playback controls or the speaker’s face. Try portrait and landscape if both are part of your routine.

For a longer lesson, think about how you will revisit a missed point. A live caption display is not automatically a saved transcript. Check pause, replay and any available text-retention controls in the chosen tool. If the material is recorded and important to review, properly prepared subtitles may be more useful than relying only on a temporary floating caption box.

Choose translation or broadcast delivery when needed

Transcription in the spoken language may be enough for unclear audio. Translation is a separate requirement, so verify the exact language pair and feature before expecting English text from another language.

On desktop, Elite Watch Party can capture supported shared-tab audio and show translated captions in Control. For your own phone livestream, StreamTranslate’s IRL setup sends speech through a supported app or OBS receiver and then to an audience caption output. Neither workflow should be confused with the phone’s local accessibility caption display or a native cross-app StreamTranslate phone application.

Quick answers

Why do captions show room speech instead of my video?

The active source may be the microphone. Check whether your device offers a phone-audio mode for the app you are watching.

Does local captioning give every viewer subtitles?

No. It usually serves the person looking at that device. A livestream needs its own caption source and audience delivery path.

Can I translate a recorded file instead?

Yes. StreamTranslate’s separately billed Video & VOD Translator creates translated subtitles from an uploaded recorded video, with review and download steps.

Continue with your setup

Watch Party setupTranslate supported desktop browser tab audio with Elite.Translate a recorded videoUpload a file and create reviewed translated subtitles.IRL audio connectionsFind the setup for your phone app or receiving OBS.Browse caption guidesFind the next task for your stream, device or audience.

Sources and further reading

Reviewed October 28, 2026. Follow the linked provider instructions for current availability and setup requirements.