How to write a melody for lyrics you’ve already written

By the Lyricsung team · Updated 3 November 2026 · How we write and test

Start from the words, not the notes. Read the lyrics aloud until you hear where they lean, put those stressed syllables on the beat, settle the rhythm before the notes, and give the chorus a higher, longer shape than the verses.

You don’t need to read music. A phone recorder and your own voice are enough, and an AI singer can hand you a first draft to react to.

8 syllables

the middle of the lines writers bring here

13 seconds

one 24-syllable line, sung in our test

2:49 to 3:29

the same 240 words in four styles

Five steps from words to a tune

1. Say it out loud. Read each line at the speed you would sing it, several times. Where you trip or run out of breath, the line will be hard to sing too, so fix it now.
2. Mark the stresses. Underline the syllables you naturally lean on: I took the long way home tonight. Those belong on the beat; the small words between them sit in the gaps.
3. Settle the rhythm first. Clap or tap the line with a stress on every clap. A line that feels right as rhythm alone gives a melody something to hang on; a line that doesn’t won’t be rescued by a good tune.
4. Then decide where it rises and falls. Let the most important word sit highest or longest, and end a line on a note that sounds finished when the thought is finished. Saying the line with feeling usually shows you the shape.
5. Pull the chorus away from the verses. The chorus should feel different from its first note: higher, slower, or with longer notes and fewer words. The verses can talk; the chorus sings.

How much a line can carry

Eight syllables is the middle of the lines writers bring here, and most fall between five and ten, which is about what one breath carries at singing speed.

Basis: lyrics people wrote themselves and had sung by the AI music engine Lyricsung runs on, 21 September to 30 October 2026, English lines, syllables estimated by rule. Counted by us; our own test songs are left out.

To see what happens when the lines of a verse don’t match, we wrote one verse with lines of 4 to 24 syllables, then said the same things in four lines of eight, and sang both to the same tune. The seconds each line took, in two takes:

The singer didn’t hurry the long lines. It slowed the tune around them, at about one to two syllables a second in both verses, so a 24-syllable line took as long as three short ones, and the uneven verse came out lopsided: lines of two to four seconds next to lines of eleven to fifteen. It also ran 35 and 31 seconds against 21 and 18 for the even verse. Lines of similar length give a tune room to repeat, which is what makes a verse sound like a verse.

Basis: songs we made on Lyricsung on 2 November 2026 from lyrics we wrote for testing, two takes each. Seconds per line come from the engine’s own word timing of each take.

The same words, a different pace in every style

A style sets the pace before you write a note. We sang one 240-word lyric in four styles: the words were identical, the songs weren’t. Pop ran 2:49 and 2:53, acoustic 3:09 and 3:10, rock 3:13 and 3:17, piano ballad 3:28 and 3:29. The slower the style, the more time each line gets, so a line that feels crowded in pop can sit comfortably in a ballad.

Repetition carries through too. In four takes of that lyric, two with part labels and two without, the chorus came back at almost the same moments, around 35, 90 and 137 seconds: when the words of a chorus repeat, the tune repeats with them. Write the chorus out in full each time and it is sung as one. The song structure guide covers what each part is for.

Basis: songs we made on Lyricsung on 2 November 2026 from lyrics we wrote for testing, two takes each. Seconds per line come from the engine’s own word timing of each take.

Use the AI’s two takes as a draft

If you don’t play an instrument, let an AI singer try your words first and react to what it does. Each run gives you two takes with different tunes for the same lines. Sing along with both, keep the phrases that feel natural in your mouth, change the ones that don’t, and record yourself. On Pro or Ultra, Stems in a song’s More menu splits it into the vocals and the backing, so you can sing your own melody over the backing alone.

Treat the takes as sketches rather than the answer. If a word lands awkwardly in both, the line probably needs rewriting, not a third take.

A ten-minute exercise

1. Take four lines of your lyrics and count the syllables in each.
2. Rewrite the longest and the shortest until all four are within two or three syllables of each other.
3. Clap the stresses of the first line, hum it on a single note, then let its most important word go up.
4. Sing all four lines to that shape. Where a line doesn’t fit, change the words rather than the tune.
5. Paste the four lines into Lyrics to song and listen to both takes. Does either resemble the tune you hummed?

Questions about writing a melody

Ready to hear your lines sung?