One syllable in seven, nearly half of what anyone hears

Think about where the last song went. An hour on verse two, because verse two is always the problem. Twenty minutes on the chorus, because the chorus arrived early and seemed fine.

That is the wrong way round, and the reason is arithmetic rather than taste.

Four lines against four verses

Here is a finished song I wrote for an earlier piece: an intro, four verses, the chorus after each of them, a bridge, a last chorus, an outro. An ordinary shape.

Counted with a pronouncing dictionary, the whole sheet is 223 syllables of writing. The chorus is 32 of them. One syllable in seven.

Now count what reaches the listener. The chorus repeats five times, so the song delivers 351 syllables and 160 of them are that one chorus. Nearly half. Put another way, those four lines outweigh all four verses put together, 160 against 150.

Every syllable you put in a chorus is charged five times. Every syllable in verse three is charged once, and by then a fair number of listeners have stopped anyway.

What that buys you on one edit

Cut two words from a verse line and the song is two syllables shorter. Cut two words from a chorus line and it is ten syllables shorter, and the line is cleaner on every pass.

[Chorus]
I hear the kettle in my sleep
and I still leave the hallway light
The house has learned to keep the time
you kept it for eleven years

The third line is 8 syllables of stage-setting in a section that has no time for it. Cut it to what it means:

[Chorus]
I hear the kettle in my sleep
and I still leave the hallway light
The house keeps time
you kept it for eleven years

Four syllables saved on the page, twenty across the song, and the short line now lands as a break in the pattern. That edit took a minute. An hour spent on verse three would not have moved the song as far.

Where the chorus rules come from

Everything the field tells you about choruses follows from the multiplier once you see it. Mastering.com's guide has the standard set: repetition sticks, the chorus should contrast with the verse, and the main lyric belongs in the last line. The Essential Secrets of Songwriting adds the energy argument from the other direction.

Keep the lines short, because a long line is punished five times. Repeat the title, because repetition inside a section that already repeats is what makes a phrase unforgettable rather than merely familiar. End on a vowel you can hold, because you will be holding it five times. Make it contrast with the verse, because five identical arrivals need to be arrivals.

None of that is a rule you have to remember if you are thinking about the multiplier. It is what anyone would do with the only four lines that get played over and over.

What the multiplier does not buy

It does not make a chorus good. A weak four lines heard five times is a weak song heard five times, and the arithmetic is just as happy to amplify a bad decision.

It does not hold for every structure either. A song with two choruses splits the same weight in two, and a song that ends on a verse gives some of it back. Count your own; the ratio is a property of your shape rather than a law.

And it says nothing about which words to use. It only tells you where an hour is worth spending.

Two things to do on the song open in front of you:

1. Count the chorus once, then multiply by how many times it plays. If that number is under a third of everything sung, your chorus is probably too long or arriving too late.
2. Spend your next editing hour on those four lines, not on the verse that has been annoying you.

Start with the count. It takes two minutes and it usually changes where the hour goes.