In the advertising business, they use a device called the ‘call to action’ to influence people’s behavior and encourage consumers to do something like: “Buy now while stocks last!” or “Call this number now!” or “Like us on Facebook and get a free gift!”
In your song, the CHORUS is the ‘call to action’. It’s the section that is meant to persuade people to listen to the rest of the song, and then go out and buy the record!
Publishers and A&R execs will look for this ‘call to action’ when they hear your song for the first time. They want to be sure that, if the song gets played on radio, the chorus will stand out enough to attract the listener’s attention when he or she is busy doing something else.
This means the chorus melody should be extremely catchy, memorable and significantly different from the verse and the bridge, with a different chord progression. Changing the beat on which the chorus melody starts can have a subconscious impact on the listener—especially if the verse melody begins on the second beat of the measure (the ‘two-beat’) and the chorus starts hammering home the hook on the first beat (like Kylie Minogue’s infectious ‘Can’t Get You Out of My Head’, writ- ten by Cathy Dennis and Rob Davis).
Some experienced writers put the chorus in a higher key to set it apart from the rest of the song. Other writers use a four-bar pre-chorus to add a burst of extra energy at the end of the verse.
Building a climactic moment into the chorus (usually during the third phrase of a 4-phrase chorus melody) also serves as a kind of fuel that adds momentum and energy to the song, while at the same time providing a musical goal for the melody, chords and lyrics.
All of these techniques can suddenly elevate the melody and let people know they are now in the chorus. While a soaring chorus can deliver a sense of satisfaction and emotional fulfillment for the listener, the heavily repeated hook drives home the title line as the musical ‘call to action’.
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