Like the variety of ornamentation in the gold and black silk thread adorning the bodices and vests in contrast to the rich colored embroidered motifs on the blouses and shirts, Aska Kolo Ansambl dances a medley of kolos and songs from the heart of central Serbia called Šumadija and the bordering region of Kruševacka Župa.

   Accompanying the kolos are Serbian traditional instruments like the frula and the more ‘modern' harmonika (accordion) from a few centuries ago. The frula , a six-holed aerophone whittled from a pear or oak tree, was traditionally played by shepherds as they spent long hours tending their sheep. Known as one of the oldest Serbian musical instruments, the frula dates back to medieval times (as seen in the painted frescoes of Serbia 's medieval monasteries).

  Beginning with the well-known Šumadiska folk song “Lepe li su Nano, Gružanke Devojke” (O mom, the girls from Gruža are pretty) accompanied on the frula , the kolos which follow – Gružanka, Stara Cacanka, and Kacerac all come from the Gruža area in Šumadija . This part was historically notable as a crossroads travelled by legions of the Roman army. The rolling hills of Šumadija are reflected in the gentle, light dance steps yet like the music which begins with an even 2/4 tempo and changes to triplets, the dance steps also trick us with unexpected variations of the step.
  The many types of songs - shepherd folk songs, ritual folk songs following harvest time, and working bee folk songs were a way to communicate where the shepherd was as well as a musical exchange to alert others in the vicinity of a wedding and other social occasions. Singers would try to make their voices heard in the open air by singing in one voice or musical patterns such as a numbering song or harmonic layers, so they can be heard at great distances. Sung in simple harmony – “na bas” style, “Ja u Bašti” (I am in the garden) is about a young lady's heart longing for that young man who lives across the way in a pale yellow house, who has teasingly thrown open all the windows, making sure he catches the eye of the young lady who has a crush on him.