Record or stream in another language with OBS

You speak your language and the audience hears another, live. With Langless and a virtual audio cable, your voice translated in real time becomes an audio source in OBS — to record a video, stream on Twitch or YouTube, or broadcast a talk. This guide shows the setup and the limits.

What you need

• A computer with Chrome or Edge — that’s where the app lets you choose where the sound goes.
• A virtual audio cable (VB-CABLE on Windows; on Mac, BlackHole, in Chrome or Edge).
• OBS Studio (free) or the recording/streaming tool you already use.

👉 Try Langless now — get started free

Step-by-step setup

1. In the app, set your audience’s language as "Other language".
2. In Listen, pick Microphone and the Continuous style (the app remembers the last style used; in Consecutive the translation doesn’t play by itself and OBS would record silence).
3. Check the target button: it should show "🌐 Translates to" your audience’s language. If it shows yours, tap it to switch — the app remembers that choice too.
4. In Listen’s devices, pick the virtual cable as the output (on VB-CABLE, CABLE Input).
5. In OBS, add an audio input capture source with the cable (on VB-CABLE, CABLE Output).
6. Mute the microphone in OBS, so the audience hears only the translation and not your original voice with it.
7. Press ▶ in Langless and record — or, in OBS, stream instead of recording (Twitch, YouTube…).

Cable step by step: VB-CABLE on Windows and BlackHole on Mac (in Chrome or Edge).

A talk or an online event

The same setup works for a talk: use the cable as the audio in OBS or directly on the event platform (as if it were its microphone). The audience hears the translation instead of your voice.

Limits

• AI voice: the audience hears the AI’s voice, not yours.
• Delay: the voice arrives a few seconds after the picture.
• Long streams: the translation has to be restarted every 3 h and stops by itself after 15 min without audio.
• AI cost: the minutes run on your own AI key, which the provider bills based on usage. You can try it first: see the free trial.