Video Audio Quality Checker
Drop in a video or audio file to check its loudness against YouTube's level and find clipping, background noise, dead air and stereo problems, each with the fix.
The sound is ready. Growati handles the rest.
Once your video is up, Growati generates the thumbnail, title, description and chapters, and you approve each one.
How to Check Your Audio Before Uploading
Choose the exported file
Use the same file you plan to upload, so the check covers the final mix and not one track of it.
Read the findings
Each check says what was measured and whether it's fine. Problems come with the timestamps where they happen.
Fix and re-check
Apply the suggested fix in your editor, export again and drop the new file in to confirm.
What It Checks
Viewers forgive soft video long before they forgive bad sound. These are the problems that can be measured from the file itself.
Loudness
Integrated loudness in LUFS, compared with the -14 LUFS level YouTube plays videos at, and how many dB to raise or lower it.
Clipping and peaks
Every place the signal flattens against the maximum, with timestamps, and whether the peaks leave room for YouTube's re-encode.
Background level
How far the quiet moments drop below the average. A small drop means constant noise or music behind the voice.
Consistency
Loudness range: the spread between the quiet and loud passages. A wide spread sends viewers to the volume control.
Silence
Stretches of three seconds or more with no sound at all, listed so you can trim or cover them.
Stereo channels
Sound in one ear only, a lopsided mix, or channels that cancel out on a phone speaker.
Frequently Asked Questions
No. The audio is decoded and measured inside your browser. Nothing is sent to a server. Close the tab and it's gone.
Around -14 LUFS. YouTube plays louder videos back at about that level by turning them down. It does not turn quiet videos up, so a video mixed at -22 LUFS sounds clearly quieter than the ones around it.
A measure of how loud audio sounds to a person over time, as opposed to how high the peaks go. It's the unit streaming platforms use to level out playback. This tool measures it the standard way (ITU-R BS.1770).
It looks for several samples in a row pinned at the maximum level, which is what a flattened waveform looks like. Each place is listed with its timestamp. Audio that was clipped and then turned down afterwards won't be caught this way.
How far the quietest audible moments sit below the average level. A clean voice recording drops a long way in the pauses. If it barely drops, something is always playing: room noise, hum or music. The tool can't tell which, so a video with music all the way through is flagged too.
No. It measures the signal, not the performance. It won't tell you if you're speaking too fast or unclearly. The Speaking Practice tool covers pace and filler words.
MP4, MOV, WebM and MKV videos, and MP3, WAV, M4A, OGG and FLAC audio. Long files are fine in current versions of Chrome, Edge and Safari, which decode the audio as a stream.
Many viewers listen on a phone speaker, which plays left and right as one. A voice recorded into only one channel sits in one ear on headphones, and channels that are out of phase cancel each other on a phone.
Sound sorted? Let Growati handle the rest
Once your video is up, Growati generates the thumbnail, title, description and chapters, and you approve each one. Start with free credits.