Live Translated Captions vs. Translated Audio: Which to Offer?

What's the difference between translated captions and translated audio?

Translated captions display the translated text on the attendee's screen. They work in environments with no audio at all, and there's no risk of sound leaking to people nearby. The catch: reading speed varies from person to person, and captions can fall behind if the speaker talks fast.

Translated audio plays the translated speech through the attendee's earphones or speaker. Attendees don't have to keep staring at a screen, so they can watch slides, the speaker's expressions, or a live demo instead. The catch: it's hard to hear over a loud room, and playing it out loud without earphones disturbs the people around you.

Choose based on venue noise

A mixer or reception-style event where people are chatting, or an outdoor exhibit booth with a lot of ambient noise, favors captions — they get the message across reliably even when the room is loud. A quiet conference room or hall where attendees are seated and listening closely works fine with audio too. Picture the venue's acoustics first, and the choice usually becomes clear.

Room layout matters too, not just noise level. A long, narrow room where the back rows struggle to hear the speaker at all benefits from captions on a shared screen or on each attendee's phone, regardless of language. A single room split into two seating sections by language can work with audio, since each side can wear earphones tuned to its own language feed without disturbing the other. If you're not sure which situation you're in until the day of the event, that uncertainty itself is a reason to lean toward a format that supports both.

Choose based on whether earphones are realistic

Whether you can assume attendees are carrying their own earphones matters a lot. Business conferences tend to have a high share of attendees with wireless earphones on hand; casual technical meetups or student events often don't. Playing translated audio out of a phone speaker without earphones disturbs everyone nearby, and organizers often end up abandoning audio altogether once that happens. Captions sidestep the problem entirely — attendees just look at their screen, earphones or not.

Think about accessibility and how freely attendees need to look around

For attendees who are deaf or hard of hearing, translated captions aren't optional — audio alone leaves them with nothing. For attendees who are blind or have low vision, it's the reverse: translated audio is essential, and captions alone don't reach them. Put those two facts side by side and it's clear that committing to only one format always leaves someone out.

Beyond accessibility, talks built around a live demo or dense slide diagrams favor audio, since attendees can keep their eyes on the screen or the stage. Talks where attendees want to reread a precise phrase later, or take notes on exact wording, favor captions. A Q&A segment is its own case: attendees following along in a second language often want captions during Q&A specifically, since spontaneous questions and answers tend to be less structured than a rehearsed talk, and rereading a line helps more than it does during a scripted presentation.

VoxFlight: captions and audio, both at once

VoxFlight is a live translation service built for small in-person events — technical meetups, university lab seminars, internal study sessions, demo days. The organizer starts a session on an iPhone with an internet connection and displays a QR code in the room. Attendees scan it with their phone's browser, choose a language, confirm audio output, and then receive translated audio and captions together in the same listening surface. Audio can be paused after confirmation. No app install, no account.

The spoken language and the translated language are chosen per session, so the pair isn't fixed in advance. Audio input comes from the iPhone's built-in mic or an external mic connected to it. VoxFlight-managed databases and storage do not permanently retain raw or translated audio. External-provider processing and retention terms are described in the Privacy Policy.

Pricing below is planned pricing ahead of general availability. Once paid purchase is available, the App Store processes payment when a session pass is purchased; the purchased pass is consumed when translation starts. The table compares one- and two-language passes.

For two target languages, the complete two-language pass is purchased once in the App Store for the same duration and attendee limit. It is not an add-on after buying a one-language pass, and the total is shown before purchase.

VoxFlight is currently in pre-launch preparation. Prices above are planned pricing, and a waitlist is open now.

That said, VoxFlight isn't the right fit everywhere. It's not built for medical or legal interpretation where errors aren't acceptable, large conferences that staff dedicated interpreter teams, or panel discussions where multiple people talk over each other. For those, a human simultaneous interpreter is worth the cost. For a talk or seminar with a few dozen attendees where you can't predict whether your audience needs captions, audio, or both, a service that delivers both at once takes that decision off your plate.

Frequently asked questions