How do I use the Audio Loudness Visualizer?

1. Click the "Start" button to begin.
2. The Loudness Visualizer automatically loads a demo file when it first opens. You can simply click the button to play the demo.
3. To play your own audio file, click the "Browse" button to select a file from your device.
4. Next, click the orange "Start Test" button to see the Loudness output in real time as the file plays.

What information is shown on the Loudness Visualizer?

The Visualizer shows loudness measured in LUFS. Loudness is calculated for Momentary and Short Term LUFS and the output is also graphed on a circular scale. This output complies with the ITU-R BS.1770-2 LKFS loudness standards.

Quieter sounds show output closer to the center of the graph, while louder sounds push out towards the outer circumferance of the graph.

What are LUFS?

LUFS, which means "Loudness Units Full Scale", is similar to decibels (dB) but measures loudness in a way that compensates for human hearing perception. "Momentary LUFS" indicates loudness at a specific moment whereas "Short Term LUFS" is a three-second moving average of these values.

Why LUFS matters in audio production?

Understanding LUFS is crucial in audio production for maintaining consistent loudness across various music platforms. It helps to ensure the best sound quality in all playback environments, particularly when services like Spotify, YouTube and Apple Music adjust their tracks to specific LUFS levels for uniformity.

Are volume and loudness the same?

Volume is a scientific measure of sound intensity, while loudness is a subjective perception influenced by factors like sound pressure level, frequency content and duration.

Need more information?

Check out our Audio Loudness Meter which includes a more detailed discussion on the subject of audio loudness.