When a group of southern Albanian singers stands in a half-circle and opens a song, the first sound is not a melody. It is a single sustained tone — low, open-throated, held by several voices breathing in relay so the note never breaks. This is the iso, and everything that follows — the lead line, the answering voice, the soaring ornamental cries — rises from that shared tonal floor.
Albanian iso-polyphony is one of the oldest surviving vocal traditions in Europe. It is entirely a cappella: no instruments, no conductor, no written score. The singers produce a layered sound from human voices alone, anchored by a communal drone that sits beneath the soloists like a pedal tone on an organ. UNESCO proclaimed it a Masterpiece of the Oral and Intangible Heritage of Humanity in 2005, and the tradition was inscribed on the Representative List in 2008. Among the traditional Albanian songs that define the country’s folk canon, iso-polyphony holds a singular place — a practice so old that scholars trace its roots to the Illyrian period, and so regionally specific that neighboring villages sing it differently.
What the drone does
The word iso is related to the ison of Byzantine church music, but the Albanian drone predates any Christian liturgical influence. In performance, the iso is not a static background hum. It is a tone maintained by a group of singers who stagger their breathing — one voice inhales while the others sustain — so the drone never drops. The result is a continuous tonal bed that can run the entire duration of a song.
The drone does two things at once. It establishes the tonal center of the song, holding the pitch around which the soloists move. And it provides a physical resonance — a low frequency that fills the room or the open air and gives the other voices something to push against. Singers describe this as the iso “carrying” the song. Without it, the solo parts lose their harmonic grounding.
The tonal system underneath is pentatonic — a five-note scale that predates the Western major-minor system. Combined with open-throated singing, microtonal inflections, and the resonance of multiple voices converging on a near-unison drone, the sound differs from Western choral music. It is rougher, more textured, and more physically present in the space.
Two dialects: Lab and Tosk
South of the Shkumbin River, which traditionally divides Albania into the Gheg north and the Tosk south, iso-polyphony splits into two main regional styles. The differences are not subtle.
Lab polyphony, from Labëria in the mountainous southwest around Gjirokastër, Tepelenë, Përmet, and the coast down to Sarandë, is the denser of the two. It uses up to four voice parts: the marrës (taker) who starts the melody, the kthyes (turner) who answers it, the hedhës (launcher) who adds soaring ornamental lines above, and the iso chorus beneath. The Lab drone is not always a sustained syllable — it can be rhythmic, sung to the actual words of the song, pulsing beneath the soloists rather than simply holding a tone. The overall effect is rougher, more guttural, and more vertically oriented, with the voices stacking on top of one another rather than running in parallel.
Labëria is where four-voice singing developed. The village of Pilur, perched on a mountainside above the Ionian coast, became known as “the balcony of polyphony.” Its Lab Polyphonic Group is the most-recorded ensemble in the southern tradition.
Tosk polyphony, from the regions of Toskëri, Myzeqe, and Çamëri, is smoother and more diatonic. It typically uses two or three voices over a drone that is always continuous, held on the syllable “e” without rhythmic variation. The voices move more horizontally — weaving alongside one another rather than stacking vertically. The Tosk style has a more flowing, sustained quality compared to the percussive energy of the Lab tradition.
A third variant comes from the Çam (Çamëri) tradition in the southernmost borderlands, now largely in Greek Epirus. Çam polyphonic songs carry a particular emotional weight because many are about the homeland — the rivers, the villages, and the events of the 1944–1945 expulsion. Çam diaspora ensembles in Greece preserve these songs as a form of collective memory.
How old is the tradition?
No one can date Albanian iso-polyphony precisely, because it existed long before anyone in the region wrote about music. The tradition is oral — passed from singer to singer, generation to generation, with no notation system and no written record of its origins.
The strongest indirect evidence of antiquity comes from three directions.
First, archaeologists have found polyphonic instruments — specifically, a type of double flute — at Apollonia in southwestern Albania, dated to the 4th–3rd century BC. A double flute produces two simultaneous tones, one of which functions as a drone. The principle is the same as iso-polyphony: one sustained pitch under a moving melody.
Second, the Arbëreshë — Albanian communities that emigrated to southern Italy in the 14th and 15th centuries — still practice a form of two-voice iso-polyphony in Calabria. Since their singing tradition could only have come with them when they left Albania, polyphony was already established in the south no later than the medieval period.
Third, musicologists point to structural features that are markers of deep antiquity: the pentatonic scale, the absence of instruments, the open-throated vocal production, the communal performance structure. Many scholars place the origins in the Thraco-Illyrian era, though this is a reconstruction from analysis rather than a dated source.
The tradition is also rooted in the vajtim — the southern Albanian communal lament for the dead. Multi-voiced funeral wailing, in which one voice leads and others sustain a droning cry, is considered one of the oldest social contexts from which the polyphonic technique grew.
Where and when it is sung
Iso-polyphony belongs to the full cycle of community life in southern Albanian villages, not to the concert stage. Weddings, funerals, harvest feasts, religious celebrations — both Christian and Muslim — and informal social gatherings all provide occasions for group singing. The Gjirokastër National Folklore Festival, held every five years since 1968 at Gjirokastër Castle, is the largest formal showcase, drawing hundreds of performers from across Albania and the diaspora. Its most recent edition ran from June 24 to July 1, 2023, after pandemic delays.
The core territory runs across four regions south of the Shkumbin: Labëria (the mountainous southwest and birthplace of four-voice singing), Toskëri (the central-south interior around Skrapar and Përmet), Myzeqe (the western coastal plain), and Çamëri (the southernmost strip, now largely in Greek Epirus).
The tradition is predominantly male. Groups of four to six men perform most of the repertoire. But female performers exist, and their visibility has grown — at recent festivals, women’s ensembles have performed four-part Lab songs that were historically male repertoire.
The practitioners
Two figures stand out in the contemporary life of the tradition.
Arian Shehu is the senior figure of iso-polyphonic singing. A regular performer at the Gjirokastër National Folklore Festival across multiple editions, he is known for a powerful voice and emotional delivery that connects the old repertoire to present-day audiences.
Hysni (Niko) Zela is the most prominent international representative of southern Albanian vocal styles. He has performed for over 40 years, touring with the Albanian National Ensemble, leading his own group, and appearing as a guest with the Fanfara Tirana brass band.
Beyond individual singers, the tradition is carried by village-based ensembles: the Lab Polyphonic Group of Pilur, the Tosk Folk Group of Skrapar, and various Çam diaspora groups in Greece. The Albanian Iso-Polyphonic Choir has represented the tradition at WOMEX (World Music Expo).
The musicologist Vasil S. Tole, a member of the Academy of Sciences of Albania, played a central role in the tradition’s international recognition. He led a systematic inventory of iso-polyphonic performers as part of the UNESCO safeguarding project and has authored more than 20 research volumes on Albanian music.
Threatened transmission
The UNESCO inscription came with a warning. Poverty in rural southern Albania, the absence of legal protection for practitioners, and the lack of financial support for singers who maintain the repertoire all threaten the tradition’s continuity. The rural exodus of young people — to Tirana, to Greece, to Western Europe — has weakened the family-based chain of oral transmission that sustained iso-polyphony for centuries.
Where once a child learned polyphonic singing from parents and grandparents at home, the tradition is now maintained largely through professional folk artists and organized ensembles. The household singing that kept the repertoire alive for generations is thinning.
Safeguarding efforts have included the UNESCO/Japan Funds-in-Trust project, which financed documentation of master singers and training programs in southern Albania. Tole’s performer inventory systematically recorded the carriers of the tradition. In 2022, an iso-polyphony museum opened beneath Gjirokastër’s Bazaar Mosque — an 18th-century mosque below the castle — with a sound installation that streams polyphonic recordings in a dark chamber beneath Cold War-era bunkers. The space was built to let visitors hear the music in a setting that concentrates the sound, because most tourists who visit Gjirokastër will never attend a village performance.
A wider family of drone-based singing
Albanian iso-polyphony does not exist in isolation. It belongs to a belt of vocal polyphony that stretches across southern Europe and into the Caucasus.
The closest relative is the Polyphonic Song of Epirus in northwestern Greece, shared by Albanians, Greeks, and Aromanians in the border region. The Epirote tradition has clear affinities with Albanian Lab polyphony, particularly the drone-based style known locally as liampiki. The cultural border does not align with the national one — the same kind of singing spans both sides of the Albanian-Greek frontier.
Farther afield, Georgian polyphonic singing (UNESCO, 2001) and Sardinian canto a tenore (UNESCO, 2005) represent parallel traditions of drone-based multipart vocal music. Georgian polyphony has three distinct regional types, including the complex polyphony of Svaneti; the Albanian tradition shares the same basic architecture — a drone beneath soloists — but the tonal systems and vocal timbres are distinct. These are not versions of a single tradition. They are independent responses to a common musical problem: how to build harmony from unaccompanied human voices. That the responses converge — a drone, layered voices, pentatonic scales — suggests that something about this architecture is fundamental to how people have sung together for a very long time.