How is sijo poetry performed as music?

Sijo is a traditional form of classical Korean lyric poetry that is performed as vocal music.1

In its simplest form, sijo may be sung to the sole accompaniment of a changgo (an hourglass drum). However, in more formal settings, the drum is typically joined by other instruments, such as a double-reed aerophone, a flute, or a fiddle. As a genre of court music, it is distinct from other vocal traditions like kagok or the narrative folk genre known as p’ansori.1