# Music playback

Source: https://storiara.com/glossary/music-playback
Last updated: 2026-09-14
Author: Nick Harty, Storiara

> Music playback is the practice of playing pre-recorded music or sound on set during takes so performers can lip-sync, dance, or move in time, or so a scene's source music is heard correctly. In a breakdown, sound and music are marked brown, and playback scenes list the track, the equipment, and the operator.

## Spotting playback in a script

Playback shows up whenever the story's music is part of the performance:

```
49  INT. KESTREL BAR - NIGHT

    Karaoke night. Ana grabs the mic and belts out the
    chorus of "Crimson Highway." The crowd sings along.
    Cole, at the bar, can't help smiling.
```

| Box | Entry |
|---|---|
| Music (brown) | "Crimson Highway": pre-record Ana's vocal in prep; instrumental + guide track for playback |
| Cast | 5. Ana, 3. Cole |
| Background | 25 BG patrons, singing along (omnies) |
| Special equipment | playback system, speakers, earwigs for Ana |
| Crew | playback operator |
| Notes | song cleared (sync + master or re-record)? Karaoke screen lyrics may need VFX |

That's a scene that starts in prep. The song has to be licensed or written, Ana may need to record her vocal in a studio, and the playback file has to be prepared with timecode so the editor can sync it.

## How playback runs on the day

The [production sound mixer](https://storiara.com/roles/production-sound-mixer) or a dedicated playback operator runs the tracks. For lip-sync, the performer sings along to their own pre-recorded vocal, loud enough to match on camera. Each take starts from a marked point in the song so the edit lines up, and a timecode slate or audio slate identifies where. For dance scenes, playback runs on speakers during wides and on thumpers or earwigs when dialogue has to be recorded over it.

Background singing along is a different matter. Crowd voices in unison are usually treated as group noise, but a background actor directed to sing a solo line may trigger an upgrade on a union show. See [background actors](https://storiara.com/glossary/background-actors).

## Other sound items in the brown box

The same breakdown category covers non-music sound needs: a phone that must ring on cue, a radio broadcast the actors react to, a baby crying off camera, a gunshot that performers need to hear. Some of these are played live on set so actors can react; others are added in post and the scene is noted as needing a cue on the day. Scenes shot without sound at all are marked [MOS](https://storiara.com/glossary/mos).

## Mistakes

The expensive mistake is shooting a performance of a song that hasn't been cleared. If the rights holder says no or quotes a price the budget can't carry, the scene may need a reshoot with a different song. Get [clearance](https://storiara.com/glossary/clearance) started as soon as the breakdown flags a named track. The other common mistake is forgetting the playback operator and equipment on the call sheet, which leaves the sound mixer running playback from a phone and a borrowed speaker.

## Frequently asked questions

### Why not just play the real song in the scene while recording dialogue?

Because music under dialogue makes the dialogue impossible to edit. Every cut would jump in the song. Productions usually record dialogue clean and add music in post, and play music on set only through earwigs, thumpers, or in bursts between lines.

### Do you need to clear music before shooting it?

Yes, if the song will be heard or performed on camera. You need permission for the composition (sync license) and for the specific recording (master use license) if you use it. Clearing before the shoot matters because swapping a song after an actor has sung it on camera is often impossible.

### What is a thumper on set?

A low-frequency speaker or pulse that dancers and performers can feel or hear faintly to stay on beat, while the microphones record clean dialogue or silence. Earwigs, small in-ear receivers, do the same job for individual performers.