Direct audio
Send high-quality audio from your computer's sound card, digital mixer or audio interface straight to Line 21 for live speech recognition with the desktop app.
When to use Direct Audio
The Direct Audio feature allows you to ingest audio directly from your computer's sound card.
This is useful when you're working with a digital mixer or a professional external audio interface and want to send high-quality audio to Line 21 for Automatic Speech Recognition.
App Audio vs. Browser Audio
The Direct Audio feature in the Line 21 App works similarly to the ASR web page.
However, the desktop app provides a more direct connection to your audio devices and is especially useful if you want to keep the audio pipeline isolated from your browser environment.
Overlay
Use the Line 21 App's transparent overlay window to show live captions on screen over other content, including burned-in captions for live events and streams.
Data handling & retention
How Line 21 handles data retention, AI model training and third-party processors in its live captioning, translation and AI dubbing pipeline, vendor by vendor.