Boost volume
Make a quiet recording louder by dB, set its loudness in LUFS, or its peak in dBFS. A limiter keeps it from crackling.
How to do it
- 1Choose a recording, or drop it on the box. You will see how loud it is now, in dBFS and LUFS.
- 2Pick how to set the volume: a loudness in LUFS, a number of dB louder, or a peak in dBFS.
- 3Press Change the volume, then play the before and after.
- 4Save the result as an MP3 or a WAV file.
Questions
What is the difference between dB, dBFS and LUFS?+
dB is a change: +6 dB is about twice as loud. dBFS is the level of a single point, where 0 dBFS is the loudest a file can hold. LUFS is how loud the whole recording sounds to a person, and it is what YouTube, Spotify and podcast apps measure.
What LUFS should I use?+
-14 LUFS for YouTube and Spotify, -16 LUFS for podcasts, -19 LUFS for audiobooks and voice, and -23 LUFS for TV broadcast.
Will it distort?+
No. When a peak would go over -1 dBFS, a limiter turns just that moment down smoothly, a few milliseconds before it arrives. Nothing is cut off, so there is no crackle.
Is my recording uploaded?+
No. Everything happens in your browser and the file never leaves your computer.