Last verified: September 23, 2026
A new K-pop song drops. Within hours, someone has measured how many seconds each member sings.
The numbers look precise. The decision that produced them is not governed by one industry rule.
Producers usually play a central role in line distribution, but the process changes by song and group. Members may audition several sections in the studio. Vocal directors can match lines to range and tone. Self-producing groups can give members much more control.
Some producers test several members on the same part
Former MOMOLAND member Daisy described sessions where members sang the same sections so a producer could hear which voice fitted each line.
In other sessions, a producer who already knew the group arrived with parts largely decided.
Both processes can exist in the same industry.
Recording can change the plan
A guide vocal or demo may suggest one distribution before the group enters the booth.
Once recording starts, range, pronunciation, tone, stamina and the chemistry between sections can change those choices.
A line that looks perfect on paper may sound better in another member's voice.
Official studio footage shows the practical side of assigning and shaping parts during recording.
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Vocal directors know details an outside songwriter may not
International songwriters can deliver demos without having worked extensively with every member.
A vocal-production team inside or around the agency knows which member handles a range comfortably, who can deliver a specific texture and where a difficult live part may create problems.
That knowledge can reshape the final recording.
Self-producing groups work differently
When a member writes or produces the song, the line between artist and producer becomes thinner.
iKON discussed line distribution during B.I's producing era, when decisions were being made inside the group-production process rather than handed down from one outside songwriter.
Other self-producing groups can work differently again.
Equal seconds are not a standard production goal
A seven-member group does not automatically aim for 14.3 percent each.
A rapper may dominate a rap-heavy verse. One singer may take the high climax. Another may have fewer seconds but own the hook everyone remembers.
The song structure comes before a mathematical equal split in many recording sessions.
That does not prove every imbalance is purely musical
Concept, agency strategy, member positions and commercial priorities may also affect decisions.
Outside listeners usually cannot prove those motives from the final audio alone.
A short line count can show that the distribution is uneven. It cannot automatically explain why.
The fan-made numbers also depend on counting rules
Does a group chorus belong to everyone?
Are background vocals counted? What about ad-libs? Does a sustained note count the same way as a dense rap section?
Different line-distribution videos can produce different totals because their measurement rules differ.
A short part can still be the song's main moment
K-pop often uses the idea of a killing part: a brief line, movement or hook that becomes the memorable center of the performance.
Ten seconds in the right place can create more attention than a longer verse.
Line time and visibility are related, but they are not the same metric.
There is no universal line-distribution formula
A producer can arrive with a plan. The booth can change it. A vocal director can move parts. A self-producing member may control much more of the process.
That variability is the most reliable answer to the question.
Two Videos Before You Go
A 2026 official NCT WISH release, deliberately different from the artists used in the surrounding DEEP posts.
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A longer Seoul travel piece from the shared Dessert pool; a different visual rhythm from music studios and performance footage.
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