Audio for reels

The voice is the story. Music, effects and trending sounds are seasoning. If a viewer taps for sound and cannot understand you within a second, they leave, and no song will save it.

Phone speakers are small and tinny. They drop most of the low end, and they play in noisy places. Mix for that, not for your good headphones.

Voice clarity first

Most reel audio problems start at the recording. A cheap clip-on microphone six inches from your mouth beats an expensive camera mic six feet away. Get close, get out of the wind, and turn off the refrigerator.

In the edit, a few moves do most of the work:

• Cut the low rumble. A high-pass filter around 80 to 100 Hz removes traffic, air conditioning and handling noise, none of which a phone speaker can play anyway.
• Even out the level. Gentle compression keeps quiet words from disappearing and loud words from jumping out.
• Add a little presence. A small lift somewhere around 2 to 5 kHz helps words cut through on small speakers. A little. Too much sounds harsh.
• Remove noise lightly. Heavy noise reduction makes voices sound like they are underwater. A little background is better than robot voice.

SoundStudio handles this kind of cleanup, and its theory pages explain each step: EQ, dynamics and noise. The AV chapter Making a voice sound right covers the same ground for video.

When music plays under a voice, it has to get out of the way. That is ducking: drop the music 12 to 20 dB whenever someone talks, and bring it back up in the gaps. If you have to strain to hear a single word on a phone speaker, the music is too loud. It almost always is.

Where music comes from

Music gets into a reel by different routes, and each carries a very different risk.

The app's own library, added in the app

Instagram, TikTok, YouTube and Facebook each license music for use inside their apps. When you pick a track from the app's audio tool while posting, the platform has a deal covering that use, within its rules. Instagram's help center describes adding audio from the Instagram audio library with the Audio tool. YouTube's help page says that to avoid copyright claims, you can use music from the Shorts Audio Library, and that depending on the song, you can add up to 90 seconds of music to a Short (as of October 2026).

Trending audio is just a popular clip from that library, used by many people at once. Using a trending sound can help a reel get shown to people who like that sound. For news and civic work, it is rarely worth it. A meme song under a story about a school closing reads as mockery, and once the trend dies the reel sounds dated.

The catch: business accounts get a smaller library. TikTok's ads help center says businesses should use its Commercial Music Library, a collection of about a million pre-cleared tracks, and that businesses cannot use the general music library for commercial use. Third-party guides report that Instagram and Facebook offer business accounts a smaller music selection too, though Meta does not publish a clear list of what is missing. If your account is set up as a business or organization, expect some hits to be missing. That is the license working as written.

Music added in your editor

This is where people get hurt. If you lay a commercial song under your reel in your editor and upload the finished file, the app has no record that you picked it from their library. Its matching systems may hear the song and mute the audio, block the reel in some countries, or (on YouTube) file a claim. Crediting the artist in the caption changes nothing. Credit is not a license.

Safe choices for editor-added music: music you wrote and recorded yourself, music you have a written license for, royalty-free tracks whose license covers social media, and public domain recordings (which are rarer than people think, since an old song can have a new copyrighted recording). MusicStudio makes AI songs, which avoids someone else's catalog, though you should read the songwriting module's lesson on AI demos before you build a brand on them.

Audio from someone else's video

Clipping a news broadcast, a viral video or a concert for its audio is the riskiest of all. Fair use, under 17 U.S.C. 107, does protect some commentary and news reporting, and the Copyright Office's Fair Use Index shows how courts weigh it. But fair use is decided case by case, and automated matching systems do not weigh it at all. They mute first.

Claims and strikes

YouTube is the most explicit about what happens, so it is the best model to learn.

• Content ID claim: an automatic match against a rights holder's file. The owner can block your video, run ads on it or just track it. A claim alone is not a strike.
• Copyright strike: applied when a rights holder sends a legal removal request and YouTube removes the video. YouTube's strike page says channels with 3 copyright strikes within 90 days are subject to termination (as of October 2026). A strike expires after 90 days if you complete Copyright School and have fewer than 3 strikes.

Shorts over one minute are touchy. YouTube's page on three-minute Shorts says that any Short over one minute with an active claim of any type is blocked, will not be playable or recommended and cannot be monetized until the claim is resolved. YouTube's general "Create YouTube Shorts" page now says such Shorts will no longer be automatically blocked and may stay playable. The two official pages disagree as of October 2026. Do not test which one is current with your best reel. Keep claimed music out of Shorts longer than 60 seconds.

The other apps are less transparent but behave in similar ways: muted audio, reduced reach, takedowns, and eventually account limits for repeat problems.

Loudness

Every platform turns playback up or down to some degree so videos play at similar volumes. None of the four publishes an official loudness target for reels in its help center. YouTube shows a "content loudness" figure in its Stats for Nerds panel, and engineers who have measured it report that YouTube turns loud videos down but does not turn quiet ones up.

So make your reel neither too quiet nor slammed:

• Aim for an integrated loudness of around -14 LUFS. It is a common working target for online video rather than a platform rule, and it plays well across all four apps.
• Keep the true peak at or below -1 dBTP so the platform's own encoding does not add distortion.
• Do not crush the mix to sound louder than everyone else. If the platform turns it down, you are left with a flat, tiring track at the same volume as everybody else.

StudioConverter can set loudness on export. The SoundStudio theory page on loudness and the AV chapter Levels, headroom and loudness explain the numbers.