It is a more polished, urban style, compared to its folk music counterpart, luk thung.
[1] Luk krung songs commonly feature themes about feelings of society, people in the capital and occurrences that happen in the period of time.
The emotions, the singing, the tone of singer, the songwriter and musicians all form to create an exquisite, delicate and gentle sound.
Luk Krung was first established around 1931, during the reign of King Rama VII, in which Thailand was going through a regime change.
Listeners and record labels began to classify the music into groups, created singers that looked more like the people in city.