a brighter cadence entered it

[hhtt]

Did she hear him? And if she did, why then was she smiling? Her voice was changing. It was younger. As she started speaking again, a brighter cadence entered it, a softer, fresher, more Viennese lilt, that put a forgiving gloss on even her severest observations.

What does "a brighter cadence entered it" mean?

Link and the source: A Most Wanted Man by John Le Carre

Thank you.

 

[dermott]

Cadence is discussed in this thread. It explains the term well: intonation vs. cadence

You can read the sentence as, She started speaking again, but (now) with a brighter cadence.

 

[hhtt]

Cadence is discussed in this thread. It explains the term well: intonation vs. cadence

You can read the sentence as, She started speaking again, but (now) with a brighter cadence.

But would you like to simply explain bright used for cadence?

Thank you

 

[dermott]

Brighter = lighter in tone, a little more lively, perhaps more cheerful.