Hendes stemme lyder rolig, selv når hun er træt.

Lyder is the present tense of at lyde, which means to sound.

So Hendes stemme lyder rolig means that her voice sounds calm. It is about how the voice is perceived by the listener.

A few related forms:

• at lyde = to sound
• lyder = sounds
• lød = sounded
• har lydt = has sounded

Because lyder focuses on impression or perception.

• Hendes stemme lyder rolig = her voice sounds calm
• Hendes stemme er rolig = her voice is calm

Both can make sense, but lyder is especially natural when talking about a voice, because a voice is something you hear and judge by how it sounds.

So this sentence is not directly stating a fact about her inner state. It says that her voice gives a calm impression.

Because sin/sit/sine can only refer back to the subject of the clause, and here the possessive is inside the subject itself.

In Hendes stemme lyder rolig:

• the subject is Hendes stemme
• there is no earlier subject in the clause for sin to refer back to

So sin stemme cannot be used here.

Compare:

• Hendes stemme lyder rolig.
• Hun sænker sin stemme.

In the second sentence, hun is already the subject, so sin can refer back to her.

Because hendes already functions as the determiner.

In Danish, possessives like min, din, hans, hendes, vores, deres normally replace the article.

So you say:

• hendes stemme
• min bil
• deres hus

Not:

• en hendes stemme
• hendes stemmen

The possessive already makes the noun phrase definite enough.

Because rolig agrees with the subject, and here the subject is stemme, which is common gender singular.

Predicative adjectives in Danish change like this:

• common gender singular: rolig
• neuter singular: roligt
• plural: rolige

So:

• En stemme lyder rolig.
• Et svar lyder roligt.
• Stemmerne lyder rolige.

Also notice: in predicative position, the adjective agrees in gender and number, but not in a separate definite form. That is why hendes stemme still takes rolig, not rolige.

They are close, but not identical.

• selv når = even when
• selvom = even though / although

In this sentence, selv når hun er træt suggests something like:

• whenever she is tired
• even in those situations, her voice still sounds calm

So it has a slightly more time-based or general feel.

If you said selvom hun er træt, that would mean:

• even though she is tired

That version is also possible in many contexts, but selv når suggests a repeated or typical situation more clearly.

Because når hun er træt is a subordinate clause, and subordinate clauses in Danish do not use main-clause V2 word order.

So after når, the normal order is:

• conjunction + subject + verb

That gives:

• når hun er træt

Not:

• når er hun træt

Compare:

• main clause: Hun er træt.
• subordinate clause: når hun er træt

If you move the subordinate clause to the front, the main clause changes:

• Selv når hun er træt, lyder hendes stemme rolig.

There, lyder comes before hendes stemme because Danish main clauses follow the V2 rule.

Grammatically, it describes the voice.

So the sentence says that her voice sounds calm. It does not necessarily mean that she herself feels calm.

That distinction matters:

• a person can be tired, upset, or stressed
• but their voice can still sound calm

So rolig is linked to stemme, not directly to hun.

Because hun is singular.

With predicate adjectives, Danish usually distinguishes:

• singular: træt
• plural: trætte

So:

• hun er træt
• de er trætte

Here the clause is hun er træt, so træt is correct.

One extra detail: with some adjectives, the neuter form adds -t, but træt already ends in -t, so you do not see a different neuter form here.