# How to Time Your Lines Over Underscoring in a Musical > Spoken lines over music need two sets of cues: the words and the bars. How underscoring, vamps, and safeties work, how to mark them in your script, how to learn the musical cue as well as the spoken one, and how to rehearse with a recording until the timing sits in your body. - URL: https://www.offbook.com/blog/time-dialogue-over-underscoring - Published: 2026-10-30 - Last updated: 2026-10-30 First rehearsal with the band. The strings come in soft under your scene, the one you've been saying at your kitchen table for two weeks, and something feels wrong straight away. You're three lines from the end of the speech when the music swells into the song's introduction. Your scene partner is already taking a breath to sing. You still have a sentence left, and nowhere to put it. Nobody gave you a bad note. You just learned half of the scene. You learned the words and your partner's cues, and the music was learning its own timing in a different room. Now they've met, and the music won't wait for your favorite pause. The short version: dialogue over music has two sets of cues, the spoken ones and the musical ones, and you need to learn both. Find out what kind of music sits under each scene and whether it can wait for you. Mark the landmarks in your script. Get the words solid at a steady pace first, then rehearse with a recording of the music until you can feel where each line lands without counting. ## Find out what kind of music is under you Not all music under dialogue behaves the same way, and the first job is to know which kind you're dealing with. Alan D. Lytle, a music director at Broadway Rose Theatre Company, puts the basic idea simply in a [2023 interview](https://www.broadwayrose.org/newsletter-summer2023/article8): "Underscoring is when the orchestra accompanies actor dialogue." He notes that a lot of traditional musicals have a couple of underscored scenes, while in some shows much of the action is underscored. Armando Fox's free guide for music directors, [*Piano/Conductor*](https://armandofox.com/music-theater/pianoconductor), breaks the territory into a few terms worth knowing. **Underscoring** is music that plays while dialogue or other action happens, played softly so it doesn't drown out the speech. It's generally of fixed length. A **vamp** is a few bars, typically two to four, repeated while something of uncertain length happens, such as your dialogue. A **safety** is a bar or repeat played only if it's needed that night. That gives you three different situations. Under a vamp, the music waits for you. Under plain underscoring, it doesn't, though the conductor may stretch or shrink the tempo a little. With a safety at the end, there's a small cushion if you run long. Ask your music director which one each underscored scene is. It changes how you rehearse it. Ask one more thing: is the music live or on tracks? Some productions without a live pit use licensed recordings. Music Theatre International's [accompaniment recordings](https://www.mtishows.com.au/marketplace/resource/performance/performance-accompaniment-recording), for example, match the score note for note, and changes such as tempo or cut bars are edited into the track ahead of time. A conductor can watch you and adjust in the moment. A track will play exactly what it played last night. ## Mark the music in your script Music directors don't keep the timing in their heads. Fox advises conductors to write dialogue lines into the score at the points where they occur, as "landmarks," so they can speed up or slow down to match small changes from night to night. You can do the same thing in reverse: write the music into your script. Use pencil, because Fox also warns that the staging is in flux until tech week and the timing will move with it. Then mark these, in your own shorthand: - Where the music starts, with the cue number from the score, so you can say "number 12" when you ask a question. - Two or three landmarks: a phrase of your dialogue that lines up with a clear event in the music, such as a key change, a held chord, or the melody of the song that's coming. - Any vamp or safety, and the exact words that let the music move on. In the score these are often marked "Cue to continue" or "Continue on." - Any sting, a short musical hit that punctuates a line, and whether your line goes before it, on it, or after it. - Where the singing starts, and how many beats you get between your last spoken word and your first sung one. If you already mark your script for memorizing, this is one more layer on top. Our guide to [marking up your script](https://www.offbook.com/blog/how-to-mark-up-your-script-for-memorizing) covers a simple system that leaves room for it. ## Learn the musical cue as well as the spoken one In a play, your cue is the end of the other person's line. Over underscoring you often have a second cue: a phrase in the music. The scene might call for your line to start as the strings drop out, or for your final word to land just before the vocal entry. If you only know the spoken cue, you'll be right on the words and wrong on the music. Sometimes the roles reverse and you are the cue. When a vamp is marked "Cue to continue," Fox explains, the conductor watches for a specific spoken line or event and only then moves the band past the repeat. Another marking, "vocal last time," means the band keeps vamping until the singer comes in, and the singer's entrance tells everyone it was the last time through. In both cases the music is listening for you, so a paraphrase or a skipped line can leave the band waiting. Fox walks through the opening of *Fiddler on the Roof*. Tevye's monologue starts around a particular measure, though it can begin a bar early or late depending on the production and the night. One vamp repeats until he reaches a certain line, and another repeats under his last phrase before the song. On the original cast recording, Fox notes, Zero Mostel took enough freedom with that phrase to need four times through the vamp. The music was built to let him take his time, and the band knew the words to listen for. So for every musical cue you mark, ask two questions. What do I listen for before I speak? And what is listening for me? ## Get the words solid at a steady pace first You can't time a line you're still searching for. If you have to reach for the words, every take comes out a different length, and no amount of music practice will fix that. Fox makes the same point from the conductor's side: some underscoring can't be stretched at all, and then the only answer is practicing with the actors until their dialogue comes out at a consistent pace. So learn the dialogue the way you would for a play: test yourself from the cues, not by rereading. Then work on consistency. Say the speech at performance speed several times and check that it takes about the same time on each run. Watch the pauses you've added, such as a breath before a big line. They're fine, but they have to be the same every night. Offbook is built for this stage. You upload your script, pick your role, and realistic voices read every other character; Offbook listens while you say your lines and plays the next cue when you finish. The video below shows its pacing controls: set how fast your scene partner talks, add a pause before any line, and let the scene move on after a silence. A pause before a line can hold the place where the music has a few bars to itself, so you get used to waiting there. Video: [Pacing](https://www.offbook.com/learn/pacing) (1:09) If you want to try that rhythm of hearing a cue and answering on time with a classic scene first, the free [run lines tool](https://www.offbook.com/tools/run-lines-online) reads the other part in Offbook's voices and waits for your line, with no account needed. ## Rehearse with a recording until the timing is in your body Once the words are solid, add the music, and add it often. Fox recommends that music directors hand out practice tracks before the first rehearsal: actors study their lines at home, he writes, "so why not their music?" Paul Mutzabaugh, a music director interviewed by the [Goodman Theatre](https://www.goodmantheatre.org/conducting-from-the-bass-chair-a-qa-with-music-director-paul-mutzabaugh/), describes teaching actors the music in the first week or two of rehearsal. That's the time to ask for a recording of the underscoring, not just the songs. If your production uses licensed tracks, the rehearsal version may already exist; MTI's are made to be shared with the cast. If not, ask the music director or rehearsal pianist to let you record the underscored section on your phone in a break. Then practice it in steps: 1. Listen to the music alone, script in hand, and find your landmarks by ear. 2. Play it again and say your lines along with it, script still in hand. Note where you finish early or late. 3. Do it from memory. Your goal is to hit each landmark, not to match every bar exactly. 4. Do it while moving through your blocking, because walking, sitting, and handling props all change your timing. After enough runs you'll stop counting. You'll feel the chord change coming, the way you feel the stairs in your own house in the dark. On stage you'll need that attention for your scene partner, not for counting bars. Keep doing a few runs without the music too. If you only ever say a speech with its underscoring, you may lean on the music to tell you what comes next, and a late or missing cue in tech can throw you off. The words should stand on their own, with the music as a second, reliable cue on top. ## When the music and the lines don't fit Sooner or later the music runs out before your line ends, or you finish with bars still to go. Don't fix it alone by speeding up or stretching your lines. That fixes tonight and breaks the scene for everyone who timed their work against you. Tell the music director, with your marked script in hand. This problem has standard fixes on their side. Fox lists them: cut a few bars of the underscoring, repeat a section, turn the last bars into a vamp, add a safety, or let the conductor ease the tempo. He also tells music directors to set aside rehearsal time just for timing dialogue under the music and to have a plan for each vamp. Lytle says he loves figuring out that pacing with the actors in rehearsal. On the night itself, the job is to keep going. If you're running long under a vamp, finish the thought; the band is waiting for your words. If you're running long under fixed underscoring, keep going clearly and watch the conductor: if there's no safety to hold the music, cut to your last essential words so the singer can come in on time. If you finish early, stay in the moment and let the music carry the silence. A student production of *Anastasia* described the same arrangement in its [school newspaper](https://nordicnews.net/15855/ae/overture-to-anastasia-spring-musical-takes-shape): the pit repeated "safety measures" until the director leading the pit, facing the stage, saw the action that let them move on. The fix is the same in every case: know the music as well as you know the words. For the rest of the score, our guide to [learning lines for a musical](https://www.offbook.com/blog/how-to-learn-lines-for-a-musical) covers songs, scenes, and the seams between them. ## Questions actors ask ### How do you say lines over underscoring? Learn the words until they come at a steady pace, then rehearse them with a recording of the music. Find two or three landmarks where a phrase of yours lines up with something clear in the music, and aim to hit those rather than match every word. ### What do I do if the music runs out before my line ends? In the moment, keep going clearly and watch the conductor. If there's no safety to hold the music, cut to your last essential words so the next entrance lands on time. Afterward, tell the music director, rather than quietly rushing it next time. They can cut or repeat bars, add a vamp or safety, or adjust the tempo, and they need to know before the timing gets locked in. ### How do I learn where my dialogue lands in the music? Get a recording of the underscoring and say your lines along with it, first with the script and then from memory. Mark where each landmark falls in your script in pencil. After many runs you'll feel the music's changes coming instead of counting them. ### Should I count bars while I'm speaking? Count while you learn it, if that helps you find the landmarks. By performance, you want the timing to come from listening, not arithmetic. If a section has no clear musical events to listen for, ask the music director what to listen for, or how many bars you have.