Background music sits beneath narration, dialogue, animation, screen recordings, or live-action footage. It supports the explanation by shaping the mood, smoothing transitions, and keeping the video moving without making the spoken message harder to understand.
The best track is not always the most attractive song or the genre that seems to fit the brand. Choose music based on the video’s purpose, audience, narration, visuals, distribution channels, accessibility needs, and licensing requirements. Then compare the version with music to a version without it to confirm that the track improves the viewing experience.
Research supports a careful approach. A 2023 meta-analysis of 47 learning studies found a small average benefit from background music, with results varying by genre, timing, learner age, and the type of knowledge tested. A separate study found that lyric-based music reduced reading comprehension among Chinese college students, especially when the lyrics used the same language as the text. That study examined reading rather than explainer videos, so it does not establish a rule for every video. It does support a practical starting point: use instrumental music with few layers when viewers must process narration or onscreen text.
Decide whether the video needs music
Watch the rough cut with the narration and sound effects before you search for a track. If the explanation already feels clear and well paced, silence may be the best choice. Music should serve a clear creative purpose, such as setting the tone, covering an awkward transition, or marking the shift from problem to solution.
Silence also suits dense tutorials, technical instructions, medical information, and other videos where viewers need to concentrate on terminology or onscreen labels. Music effects depend on context. Research on film music identifies distraction and overload as factors, along with the video’s content type and the conditions in which viewers listen. A track that supports a product reveal could interfere with a detailed instruction.
Write a short brief before opening a music library:
- Who is watching, and how familiar are they with the subject?
- Should the video feel calm, confident, warm, urgent, precise, or playful?
- Where are the hook, problem, explanation, solution, proof, and call to action?
- Does the video contain continuous narration, captions, dense text, or sensitive content?
- Where will the video appear, and what rights does that use require?
This brief helps prevent a common mistake: choosing a song first and forcing the edit to fit it.
Choose tone, energy, and density
Match the music to what the video promises viewers. For example, a cybersecurity explainer may need a stable, restrained pulse, while a healthcare video may need sparse, warm instrumentation. A software tutorial may work better with a minimal loop or no continuous music. Use these as starting points rather than fixed genre rules.
Music affects how viewers interpret visuals and stories. Research on audiovisual congruence found effects on self-reported emotional valence and arousal, while a review of film-music research describes effects on attention, interpretation, memory, and emotional response. The track should fit the subject, visuals, brand, and associations the audience is likely to have.
Consider four musical properties:
- Tone: the emotional character, such as reassuring, credible, curious, or bold.
- Energy: the level of rhythmic drive, tempo, percussion, and intensity.
- Density: how many instruments, melodies, rhythmic layers, and changes compete for attention.
- Editability: whether the track has clean sections, useful endings, loopable passages, or separate stems.
A stem is a separate audio file containing one part of a track, such as drums, bass, pads, or melody. Stems let an editor remove a distracting layer while keeping the rest of the music.
Use less energy and fewer layers beneath complex explanations. Reserve stronger rhythmic changes for openings, transitions, reveals, montages, and end cards. Avoid a dramatic drop or melodic climax beneath a sentence that contains an important instruction.
Use instrumental music when narration carries the message
For most explainers led by narration, start with instrumental tracks. Lyrics require viewers to process language, so they are more likely to interfere when viewers must listen to narration or read captions.
Vocal music can still work when the video has little narration, when the lyrics form part of the creative message, or when the vocal appears during a montage or end card. Test it carefully before using it beneath technical explanations. A 2024 reading study found poorer comprehension with lyric music than with silence, but it involved 90 Chinese college students, not a U.S. explainer audience, and did not test instrumental music. The published record also includes a corrigendum, so its detailed statistics require care.
Avoid prominent lyrics during dense narration, important onscreen reading, and instructions. Familiar songs and strong vocal performances deserve extra caution because they attract attention.
Mix music around the voiceover
Edit the voiceover first so the spoken structure is clear. Then place the music underneath it and adjust both the arrangement and the volume.
Audio ducking means lowering music when dialogue or narration begins, then allowing it to rise during pauses. Adobe describes ducking as an automated way to reduce background music against dialogue and create a more balanced mix. Use automation to raise the music during a nonverbal opening and lower it beneath detailed explanations.
Do not rely on a universal rule such as keeping music a fixed number of decibels below the narrator. The balance depends on the voice and language, as well as the music arrangement. Playback device and script detail matter too. Check the result on headphones, laptop speakers, and a phone.
Loudness standards help measure the finished program, but they do not set a creative ratio between music and voice. ITU-R loudness guidance defines methods for measuring program loudness and true-peak level. Destination-specific requirements, such as EBU R 128 for its broadcast context, apply only when that delivery context requires them.
Plan accessibility before publishing
Do not use music alone to convey essential meaning. Use narration, captions, visual design, or another accessible channel to communicate warnings and instructions, explain product benefits, and deliver calls to action.
Provide accurate synchronized captions. Harvard accessibility guidance recommends that captions include important non-speech sounds when they help viewers understand the content. If essential visual information is missing from the narration, follow the applicable W3C guidance on audio description.
Leave enough quiet space for spoken descriptions when needed. Music in every gap leaves less room for accessibility content and makes the narration harder to separate from the background.
Confirm music rights before building the edit
A subscription for personal listening does not normally grant permission to place a recording under a video. In the United States, audiovisual use generally involves two rights: a synchronization license for the underlying composition and a master-use license for the particular recording. The U.S. Copyright Office explains these rights.
Read the license that applies to the exact project. Confirm that it covers commercial use, paid advertising, client work, your locations, platforms, editing, future versions, attribution, and Content ID claims.
“Royalty-free” does not mean copyright-free. Creative Commons licenses impose different conditions. Creative Commons explains that synchronizing music with visuals counts as a transformation, so music under a NoDerivatives license cannot be used in a video. YouTube’s Audio Library provides platform-specific options, but some tracks require attribution and other distribution channels still need separate permission.
Test the track against silence
Create two versions: one with the selected music and one without ongoing music. Ask representative viewers whether they understood the explanation, remembered the main point, trusted the message, and noticed any distracting musical moment.
Choose the music version only when it improves the intended experience without making the speech harder to understand. If viewers struggle with the narration, lower the music, simplify the arrangement, move the musical change, or remove the track.
