How to add background music beneath a talking video

You have a video of someone talking and a music file, but putting them together can make the voice hard to hear. The key is to keep speech and music on separate tracks, then make the music quiet enough to support the voice rather than compete with it.

You can prepare the music in TooLab's Audio Editor by trimming it or adding fades. It edits audio files, but it does not combine audio with video or export a finished video, so you will still need a video editor for the final mix.

Add the music under the speech

1. Use the Audio Editor if the music needs trimming or a fade before you add it to the video. Export the prepared track as WAV or MP3. If it already fits, you can use the original music file instead.
2. Open your video project and import both the talking video and the music file. Keep the original video clip on the main video track, with its camera audio enabled, and place the music on a separate audio track below it. A separate track lets you adjust the music without changing the voice.
3. Line up the music with the part of the video where you want it to begin. If the speaker starts after an introduction, leave the music alone during that opening or lower it when the voice begins. Trim the music at the end of the video so it does not continue into silence.
4. Lower the music until every spoken word is easy to understand. If your editor shows audio levels in dB, try setting music peaks about 18 to 25 dB below the speech peaks as a starting point. The right balance depends on the song, the speaker, and how you will play the video, so listen rather than relying only on the numbers.
5. Add a short fade-in and fade-out to the music, then play the whole video from beginning to end. Check the opening, a section with continuous speech, any pauses, and the ending. Export a test copy and listen to it outside the editor before you deliver or post it.

Editor controls have different names, so look for options to adjust a clip's volume, trim its start and end, and create audio fades. Avoid changing the video clip's own audio level when you mean to change the background track.

What the result means

The music is audible, but the words stay clear

This is the goal. You should notice the music in pauses and quieter moments without having to strain to follow the speaker. Check a few different sections, because a louder word or a change in the song can make a balance that worked at the start feel too strong later.

The music covers words or makes the voice tiring to hear

The music is too loud, or it has strong sounds in the same range as the voice. Lower its level first. If your editor has an equalizer, try reducing some of the music's midrange, where many speech sounds are prominent, but make a small change and listen again.

The music is hard to hear even when the speaker pauses

The track may be set too low, or the source file may be very quiet. Raise it slightly and replay the loudest speech section. If raising it makes the words hard to follow, consider a different music track with a simpler arrangement or less strong percussion.

The music starts or stops abruptly

A sudden cut can sound like a mistake even when the levels are right. Add a fade at the start and end. If the music has to continue beyond the end of its file, repeat it only if the join sounds natural, and use a crossfade if your editor offers one.

How to fix a mix that does not sound right

1. Check that the speech track is on. Make sure the video's original audio has not been muted or turned down. If you recorded the voice separately, check that the audio clip is aligned with the speaker's mouth and not slightly ahead or behind.
2. Turn down the music first. Reduce its volume in small steps while replaying a section with clear speech. This is usually quicker than trying to make a loud music track fit by changing several other settings.
3. Listen for competing sounds. A busy melody, strong drums, or vocals in the background can distract from spoken words even at a low level. Try a quieter passage, a simpler track, or music without lyrics.
4. Use automatic ducking gently. If your editor has ducking, it lowers the music when it detects speech and brings it back up during pauses. Set the change to be subtle, then listen for the music pumping up and down between sentences.
5. Check the export, not just the preview. Play the exported file in a regular video player with your usual headphones or speakers. If the mix changes after export, review the export's audio settings and make another short test before rendering the full video.

Keep the mix consistent on different speakers

Small phone speakers can make a voice sound thinner and music feel louder than it did on headphones. Listen to the exported video on at least two playback devices if you can. Keep the speech comfortably clear at a normal listening volume, and avoid raising the overall level until the loudest words distort.

If the music is meant to sit under a long explanation, use a track that does not demand attention. A steady instrumental bed is often easier to balance than a song with lyrics, sudden drum hits, or large changes in loudness.