We can see that Korean folk song is the basis of the genres and moods of the national music in the middle ages from the analysis of the music moods of the popular professional music genres such as a Tanga (Korean classical song with short quick notes), Sagori and Ginzapga and of the instrumental music genres such as Tosiryongsan, Minganryongsan, Sinau and Sanjo generated and developed that time.
What was main among our national music genres in the middle ages was popular music and music of the upper classes.
The popular music refers to one created by the working people, and diverse popular professional music genres including the folk song belong to this music.
The music genres created by the popular professional musicians in the middle ages are all based on the melody mood of the folk song.
Not only the vocal music genres but also the popular instrumental music genres are based on the melody mood of Korean folk song.
What is important here is that not only a tone but also rhythm and time are based on the folk song of the locality where the corresponding instrumental music genre was generated.
The music genres enjoyed by the upper classes of the city that time are also based on the folk song in the melody mood.