This is the 655th most frequent Danish word.
langsomt
"Langsomt" means "slowly" in English.
Here, 'langsomt' describes the tempo of the music, functioning as an adverb to modify the manner of playing.
Musikken spillede langsomt og melodisk.
The music played slowly and melodiously.
In this usage, 'langsomt' acts as an adjective to describe the nature of the progress being made.
Vi gør langsomt fremskridt med projektet.
We are making slow progress with the project.
In this sentence, 'langsomt' is an adverb describing the manner of the walking action, indicating a slow pace.