One audio clip is louder than another? How to fix it

You have joined two recordings, but one sounds much louder than the other. That can make a conversation hard to follow, even when both clips sound fine on their own.

Compare the clips at the same playback level, then adjust the louder or quieter clip before combining them. The Audio Editor can help you trim, fade, arrange, join, and export clips. For a lasting level correction, you need a gain or loudness control in the editing app you use for that step.

Compare the clips fairly

1. Open the Audio Editor and place the clips on separate tracks or in the order you plan to join them. Keep an untouched copy of each original file.
2. Play each clip at the same listening volume. Do not turn up your speakers for the quiet clip and then forget to turn them back down. If you need to check your computer's playback level, use Settings › System › Sound on Windows 11 or System Settings › Sound on macOS, then leave the volume steady while comparing.
3. Listen to a typical section of each clip, not just the loudest word or sound. For speech, compare several sentences at a comfortable level. For music, compare a representative section rather than a brief pause or a sudden accent.
4. Note whether one whole clip is consistently louder, or whether only certain words, notes, or impacts jump out. Also listen for crackling or harsh distortion, which may need a different fix.

Try the same comparison with headphones if possible. Small speakers can make bass-heavy or quiet material seem different, so use the playback setup you expect your audience to use when you make the final check.

What the difference means

One whole clip is consistently louder

The clips probably have different recording or editing levels. The person speaking may have been farther from the microphone, or one file may have been turned up earlier. Lower the loud clip or raise the quiet one using clip gain or a volume control. Make small changes and listen again instead of making a large jump at once.

The average level sounds similar, but some moments are much louder

The clip has a wider dynamic range: its quiet and loud parts are farther apart. Raising the entire clip may make its loudest moments too strong. A compressor can reduce the difference between loud and quiet moments, but heavy compression can make speech sound flat or bring up room noise.

The loud clip sounds rough or crackles

The recording may be clipped. Clipping happens when the signal is too strong for the recording system to capture cleanly. Turning the clip down can make it quieter, but it will not restore detail that was lost when it clipped. If the original recording is available, use a cleaner take or a backup version.

The clips sound different only at the join

The levels may be close, but the edit may have an abrupt transition. A short fade can make a cut less noticeable. It will not correct a clip that stays too loud throughout, so match the levels first and use a fade only to smooth the transition.

How to fix the level difference

1. Adjust the clip gain. In an editor with clip gain or a per-clip volume control, reduce the louder clip or raise the quieter one. Start with a small change, such as 2 or 3 dB, then compare again. Clip gain changes the level of that clip without changing the computer's overall playback volume.
2. Use loudness normalization for a consistent target. If the clips are separate speech recordings, use a loudness-normalize feature in an editor that offers it. Loudness normalization estimates how loud a clip sounds overall. It can give separate recordings a more consistent starting point, but still listen for quiet words and sudden peaks afterward.
3. Compress only uneven sections. If one person speaks softly and then suddenly shouts, compression can reduce that gap. Use it gently, and listen for background noise becoming more noticeable or the voice losing its natural variation. If the whole clip is simply too loud, adjust its gain instead.
4. Match the transition. Once the levels are close, cut away unwanted silence and add a short fade where the clips meet if the change sounds abrupt. The TooLab Audio Editor supports cutting and fades, and can join files on tracks.
5. Export and listen from the beginning. Play the exported file at a steady volume, including the transition between clips. Check that quiet speech remains understandable and that loud moments do not crackle. Keep the original files so you can revise the mix without starting over.

The TooLab Audio Editor can arrange and join clips, cut them, add fades, and export WAV or MP3. Its listed controls do not include per-clip gain or loudness normalization, so use an editor with those controls to balance levels, then use TooLab to assemble or trim the result.

Why matching peaks is not always enough

A peak is the loudest instant in a clip. Two clips can have the same peak but still sound very different if one stays loud for most of its duration and the other has only a brief loud sound. Peak normalization sets the highest instant to a chosen level. Loudness normalization aims to match how loud the clips sound overall. For spoken audio, listening to whole sentences is often more useful than matching only the peaks.

Files you open in the Audio Editor stay on your device.