Albanian Iso-Polyphony

Albanian iso-polyphony is performed by small male or female groups singing in two, three or four parts. One or more singers hold a sustained drone vowel — the iso — while one or two soloists weave melodic lines above it. The harmonies often land on intervals that western ears hear as dissonant seconds. Lyrics treat love, mourning, migration and historical battles, sung in Tosk or Lab Albanian. Tempos are slow and the texture is unaccompanied.

Iso-polyphony is concentrated in the southern Albanian regions of Tosk, Lab and Çam, with related traditions in Albanian-speaking parts of Greece and southern Italy. UNESCO inscribed it on its Masterpieces of the Oral and Intangible Heritage of Humanity list in 2005. The annual Gjirokastër National Folk Festival, held in the southern town's hilltop castle, is the central showcase for the form.

The iso is a single held vowel — often a long, open ah — that anchors the harmony underneath the melodic lines. Listen for the moment one solo voice peels off from the iso and a second voice answers it. The close-interval clashes are intentional and characteristic; they resolve only at phrase ends.

Recordings from the Gjirokastër Festival, available on the Smithsonian Folkways and Ocora labels, are the canonical introduction. The Albanian National Folk Ensemble's recordings extend the tradition into a stage format.

The iso vowel is not standardised across regions — Lab groups tend to hold a brighter ee or eh, while Tosk groups favour a darker ah, and ethnomusicologists use those vowel choices as one marker of regional sub-style.