What Does a Film Composer Do? A Director’s Guide to Working With One

A film composer writes the original music for a film, known as the score, and shapes every piece of it around the picture so it tells the story the director wants to tell. That’s the short answer. In practice, the job is part musician, part filmmaker, part psychologist and part translator.

If you’re a director who’s never worked with a composer before — or you have, and it didn’t go the way you hoped — understanding the job a little better will help you get more out of the collaboration. After all, handing over your baby to a composer means trusting them to help finish telling the story. A film composer holds a powerful paintbrush, but the picture is yours. Our job is to bring the director’s vision to life.

Below, I’ll walk through what film scoring actually involves, when to bring a composer on, and how to work together from the spotting session to the final recording.

What a Film Composer Does: The Short Version

Here’s the basic definition: a film composer writes original music built to fit specific moments in your film. Each piece is called a cue, and it’s timed to picture. Some cues are thirty seconds, some run ten minutes. Every one has a job to do in its scene, and that job is not just to “fill in the space” or “make it sound nice.”

On a typical project, film scoring covers these steps:

1. Spotting: watching the cut with the director and deciding where music goes, and where it doesn’t.
2. Finding the sound: developing the score’s palette and its musical themes, often a motif for a character or an idea.
3. Writing cues to picture: composing each cue so it hits the right moments in the edit.
4. Mockups: building demos of each cue for the director to hear and react to before anything is final.
5. Orchestration: adapting the music for live players, by the composer or an orchestrator, with parts prepared for each musician. An all-virtual score may skip this step.
6. Recording: running sessions with musicians, sometimes conducting them.
7. Mixing and delivery: mixing the score and delivering final mixes and stems: the score delivered in separate, synchronized audio groups, often organized by instrument family (strings, percussion, synths), so the re-recording mixer can balance each one against dialogue and sound effects in the film’s final mix.

A composer rarely works alone. Besides the director, you’ll usually find the editor, whose temp music shapes early conversations, and the music editor, who keeps the music in sync as the cut changes and tracks it through post-production. Depending on the budget, there may also be an orchestrator, a score mixer, and a music supervisor who oversees song selection and licensing.

The skills behind the job

Film scoring takes a strong background in music composing and orchestration, technical skills with a digital audio workstation (DAW) and sample libraries, and a storyteller’s instincts. Some composers come up through degrees in music or dedicated film scoring programs; others are largely self-taught. In today’s film industry, a contemporary film composer is often their own music producer and mixer as well.

There are also different types of composers. Some work mostly in film, others in TV, video games or trailers, and many industry professionals move between them. When you’re hiring for a feature or a short, look for someone whose experience is in scoring to picture with a director, because that collaboration is most of the job.

Score vs. source music

Most of a film score is underscore, sometimes called background music: music only the audience hears. Music the characters can hear — a car radio, a band at a wedding — is called diegetic music, or source music when it comes from something in the scene. It’s often a licensed or featured song chosen by the music supervisor and placed by the music editor. The composer comes in when source music has to blend with the score, or when it doesn’t exist yet and has to be written. I’ve done this myself. On a film set in New York, the opening shows an Andean band playing in the subway. The director filmed the band, and I wrote the music so it looks like they’re playing it, which meant the source music and the score could grow from the same roots. Some of the most memorable moments in film music happen when that line blurs: a song on a radio slowly becomes the score, and the audience barely notices the handoff.

Why the Score Does Real Storytelling Work

Music in film can reach the audience before their conscious mind catches up. A shot of someone walking down a hallway might be neutral. Add the right cue and it’s dread. Add a different cue and it’s triumph. Add nothing and it’s just… a hallway.

That’s the impact a musical score has, and it’s why film music is one of the pivotal elements of storytelling, not decoration or garnish on the plate. A score can stretch moments of suspense, tell the audience whom to trust, or go silent a beat before a jump scare so it lands harder.

One of the most underused tools is a recurring musical motif tied to a character. A short phrase that returns, slightly transformed, every time we see that character builds recognition and emotional shorthand without a single line of dialogue. Audiences feel it long before they consciously notice it, and it’s something you can ask your composer for directly.

Here’s the part that surprises first-time filmmakers: we can only go so far without understanding the intention behind a scene. It may be perfectly clear to the director, but until there’s music, the composer is still just another audience member, trying to figure out where the scene is going. Most of the time it’s no mystery. Sometimes it is (especially in mystery movies). Why is this scene shot this way? What is the character hiding? Where should the audience’s sympathy lie? Without that context, a composer has to guess at the scene’s intentions, and while we have pretty good instincts, we’d much rather use them in service of your vision than accidentally start creating our own.

When to Bring a Composer Onto Your Project

Many first-time filmmakers bring a composer on at the very end: the picture’s locked, the deadline’s looming, and suddenly it’s “now we need original music.” The instinct makes sense: music is often one of the last elements to come together in post-production. But if you can involve your composer earlier, while you’re still in the edit, you’ll usually get a better score and a smoother process. The trade-off: if the cut changes after cues are written, the music has to change with it.

Why? Because the score is the musical side of the new world your movie creates. That world doesn’t exist anywhere but in your film, and like anything unique, it needs time to develop. Some directors are also glad to have the composer as one of the earliest audience members: a fresh pair of eyes that can share an opinion or, better yet, suggest ways the cut could work with musical ideas already brewing.

Temp music and “temp love”

During the edit, your editor has most likely placed temp music in the timeline, often borrowed from other films. That’s a completely normal part of the process, and it’s genuinely useful for communicating tone. If you show me a scene temped with something moody and sparse, I know a lot more about your intentions than if you’d told me “make it oblique.”

The risk is “temp love”: the director, or the whole room, gets used to the temp and starts asking the composer to reproduce it, even where it isn’t right for the scene. Coming on early gives us a chance to talk about the temp before that happens. If you’re using temp, treat it as a mood board, not a target to hit note for note, and say so out loud to your composer. That changes how we approach the assignment.

Still looking for the right person? The TuneReel guide on how to hire a film composer covers demo reels, budgets and what to ask before you sign.

What to have ready before you start

You don’t need a detailed musical brief. A rough cut, a clear sense of what the film is trying to say, and a few references are enough to start the conversation. It also helps to share:

• Your delivery deadline and when picture is expected to lock
• Your approximate music budget
• Any temp music in the cut, and how attached you are to it
• Scenes where you already know music is essential, or where silence matters

You don’t need all the answers. Part of the process is discovering them together.

Working With a Film Composer: The Spotting Session

The most fulfilling scores I’ve worked on came out of relationships where the director treated the process as a genuine creative collaboration. That doesn’t mean you need to know music theory. It means treating the composer as a creative partner and talking about tone, references and story intent in plain language.

The collaboration usually kicks off with a spotting session. The director and composer sit down together, watch the cut, and decide scene by scene where music should start, where it should end, where there shouldn’t be any music at all, and what each cue needs to do emotionally. Sometimes it’s plain technical work (cue starts here, ends here). But it sets the map for everything that follows.

That map matters. We don’t want to spend precious time scoring a scene when the director didn’t want music there at all (yes, that happened to me), or wanted the music to steer the audience somewhere completely different from what seemed obvious to me at first. (Next time, I’ll reread the notes before starting the next cue.)

To get the most out of a spotting session, come prepared to share your instincts, even if you can’t put them into musical terms. Point to a specific shot and say “this is where dread should really kick in” or “I want this scene to feel like it’s holding its breath.” That kind of language is gold to composers.

If it’s hard to articulate what you want, that’s understandable. Throw out anything that comes to mind, even if the words sound contradictory. We’ll decipher it. Saying anything is usually better than saying nothing. And if you’ve worked with someone before, “you know what to do here” can be exactly the right note.

From Mockup to Recording Session

Once spotting’s done, the writing begins. This is where many filmmakers lose visibility into the process, so let’s pull back the curtain.

Depending on the size of the project, the amount of music and how the score is produced, the full scoring process, from first cue to final delivery, can take anywhere from a couple of weeks to several months. Budget that time into your post-production schedule from the start. Scoring often gets squeezed at the tail end of a project, and rushed scores tend to sound exactly like what they are: rushed.

What a mockup is (and isn’t)

The first version of a cue you hear is usually a demo, or what composers call a mockup. Mockups are built with sample libraries and software instruments. Sometimes a mockup is barely a simple piano melody, just to start the conversation. Sometimes it’s far more fleshed out.

If your project has the budget for live players, the mockup is the blueprint for the recording. That slightly unnatural guitar line in the demo will be replaced in the session and sound great. If it’s an all-virtual score, the mockup evolves directly into the final mix through a few rounds of polish.

These days, professional composers can make mockups sound remarkably polished. Unless a live session is scheduled, what you’re hearing may already be close to the final sound, and that’s intentional. If we’re confident about a cue, we’d rather you hear the idea in its full glory than ask you to approve a rough version and promise it’ll sound better later. So if you’re not sure whether you’re hearing a sketch or something close to final, ask. It’ll save you from reacting to a rough guitar line as if it were the finished score.

The recording session

Once cues are approved and the score calls for live players, we move into a recording session: real musicians, a scoring stage, often a conductor, and a recording engineer capturing the final, human performance. Directors are welcome to attend. It’s thrilling, and one of my favorite parts of the process. Even with a small ensemble, the difference between a mockup and live players can be night and day.

The key is timing: once we’re recording, changes get expensive (more on notes below).

How to Give Notes Your Composer Can Use

You don’t need to know what a diminished chord is to give useful notes on a score. The most productive feedback often comes from directors with zero musical background who simply talk about story and feeling, rather than telling the composer which chord, scale or instrument to change.

A few things that help:

• Use references. “This reminds me of the quieter parts of [a film you love]” says far more than “make it less busy.”
• Tie notes to story, not abstract mood words. Instead of “make it bigger,” try “I need the audience to feel like she’s not going to get out of this.”
• Point to specific moments. A cue is rarely wrong in its entirety. Usually it’s one section, one phrase or one transition, and telling a composer exactly where saves headache, heartache and, most importantly, time.

Revisions are normal. We try, but we won’t ace it every time. Some notes address an ending or a section, and some will simply be that we got it all wrong: too fast, too slow, too dense, too… much? If the music is changing how you envisioned the scene and you can’t explain why, just say “this isn’t working for me.” You don’t need to diagnose the musical problem. Often we already have an idea of what to change. We just needed to see your reaction to what we tried.

Just give notes early enough that there’s time to act on them before the recording session. Notes on a mockup are cheap to act on. Notes after a cue has been orchestrated and recorded with live players are expensive, sometimes prohibitively so. When something feels off, we’d rather hear it early.

Choosing a Musical Style and Voice for Your Film

Film scores aren’t limited to sweeping orchestras. That’s just the version people picture by default. A score can be built from rock instrumentation, jazz, folk, electronic textures, world instruments, or a hybrid nobody’s quite tried before. The right choice depends on your film’s period, setting and tone, and it’s a creative decision worth discussing early.

I once worked on a movie set in New York City where the director wanted Andean music running through the score. He’d grown up with it, and it started with that subway band in the opening scene. It was a treat to explore something so different.

In most cases, a composer will work early on to establish the musical tone and share what they find. But if you have ideas of your own, I’m all ears. Specific tracks, movies to reference, general thoughts: share them. You may hold the key to something original. That doesn’t mean we’ll end up sounding like the avant-garde Stockhausen recording you played in our first meeting. A reference is a compass, not a template to copy.

Budget, Rights and Practical Considerations

When it comes to money, some filmmakers learn this part the hard way. A score’s cost isn’t just the composer’s fee. If you want live musicians or a full orchestra, you’re also budgeting for an orchestrator, a copyist, the players, a studio or scoring stage, and a mixing engineer. An all-virtual score built with sampled instruments has a very different cost structure, and depending on genre and scale, it can sound excellent for a fraction of the cost. That’s why many low-budget films go that route.

Talk about this honestly with your composer up front. A good one will tell you what’s realistic for your budget instead of promising a live orchestra sound on a sample-library budget.

Rights and ownership are the other piece people skip until it becomes a problem. Who owns or controls the score once it’s written? Owning a score and having the right to use it aren’t the same thing: a composer can grant you broad, perpetual rights to use the music in your film while keeping the copyright. Can you use it beyond this film, in a trailer, a sequel or a different cut down the road? Is the composer working for a flat fee, or is there talk of royalties or backend points? Don’t leave any of this to a handshake. Get it in writing, and if the project is anything beyond a small passion piece, have an entertainment lawyer review the agreement.

This section is general information, not legal advice.

If you’d like help finding the right musical voice for your film, TuneReel’s custom scoring service can match you with two or three composers from its roster. You’ll get a flat-fee quote upfront, plus high-resolution masters and stems on delivery.

Why This Collaboration Matters

Here’s what I love about this job: taking a scene that isn’t quite telling its story yet and watching the music make it whole. I’ve sat through cuts where everything on screen made sense and nothing was technically wrong, but the scene just wasn’t landing. Then we score the moment, and it finds its rhythm, its emotion and its original intention. The music didn’t decorate it. It was the missing piece all along.

That’s the throughline of everything above. You could hand off a brief and get a finished score back. But the best results come when a composer and a filmmaker trust each other, keep an open mind, and let the conversation turn into music. (For more on how a score shapes what audiences feel, see The Art of Scoring.)

FAQ

What does a film composer actually do?

A film composer writes the original music for a film, known as the score. The score is made up of individual cues, each written for specific moments on screen. The job runs from the spotting session through mockups, orchestration, recording and delivering the final mixes. Just as important, it means interpreting the director’s vision and translating story intent into music.

Who does a film composer work with?

Mostly the director, plus the editor, the music editor who places and syncs cues, and on larger projects an orchestrator, a score mixer and a music supervisor who oversees song selection and licensing.

When should a director bring a composer onto a project?

Ideally during the edit, not after picture lock. A composer who joins earlier can respond to the film as it evolves, and both sides have time to talk through the temp music before it becomes a hard-to-shake reference point.

What is a spotting session?

The director and composer watch the cut together and decide, scene by scene, where music goes and what each cue needs to do emotionally. It’s usually the first formal step after a composer joins.

What’s the difference between diegetic and non-diegetic music?

Diegetic music exists inside the story, so the characters can hear it, like a song on a car radio. Non-diegetic music is heard only by the audience. Most of a film score is non-diegetic, though a score sometimes crosses that line on purpose.

What’s the difference between a mockup and the final score?

A mockup is a demo of a cue built with sample libraries. With live players, it’s the blueprint for the recording session; in an all-virtual score, it’s polished into the final mix.

What skills does a film composer need?

Strong musicianship and orchestration, technical skills with a digital audio workstation and sample libraries, and a feel for storytelling. Just as important for a director: someone who communicates clearly, takes notes well and delivers on a post-production schedule.

What’s the difference between a composer and a music producer?

A composer writes the music itself: the melodies, harmonies and structure. A music producer shapes how a recording sounds, from the performances to the arrangement and the mix, and is most common on songs and albums. On a film score, the composer usually handles much of that production work too.

How much do film composers get paid?

Film scoring pay varies widely. On indie films, composers are often paid a flat “package” fee that also has to cover musicians, studio time and mixing, so the composer’s take-home can be far less than the music budget. Rates depend on the budget, the amount of music and whether the score is recorded live.

What should filmmakers budget for beyond the composer’s fee?

For a live score: an orchestrator, a copyist, musicians, a recording studio or scoring stage, and a mixing engineer. An all-virtual score built from sample libraries has a very different cost structure. A good composer will tell you what’s realistic for your budget.

Who owns the score once it’s written?

It depends on the agreement. Ownership, usage rights (trailers, sequels, future cuts) and how the composer is paid (flat fee vs. royalties or backend points) should be defined in writing before scoring begins.