Audio feeds

When to use audio feeds

Audio feeds are important to ingest any audio source into Line 21 to let our Automatic Speech Recognition models to do their work.

Whether you're an audio/video team connecting stage audio to Line 21, or you simply want to capture your computer microphone to transcribe a conversation, you're covered.

The goal is to provide a clean audio feed where only voices are captured. In professional setups, you likely have access to dedicated microphones designed to capture only the speakers' voices. This audio is often routed into the computer through a professional audio mixer. The rule of thumb is: the cleaner the audio, the higher the accuracy. Avoid sending audience noise, ambient sounds or music together with speech whenever possible, as they will reduce ASR accuracy and overall performance.

Even if you're not using professional equipment and are relying on your computer's microphone, try to keep the feed as clean as possible by isolating your voice from external noise.

Line 21 offers multiple ways to ingest audio feeds.

ASR Page

Through the ASR web page, you can ingest audio from any microphone available to your browser. This approach is sufficient for the vast majority of setups. The page also includes a monitor that allows you to see what is being captured and distributed in real time.

Line 21 App

The Line 21 App has a section dedicated to audio ingestion. The advantage, compared to the browser, is that you have a dedicated app and monitoring it can be easier compared to a browser tab.