Sri Lankan folk music is built on layers — the low throb of a drum, the shimmer of small cymbals, the breathy call of a flute. Woven through many of these traditional soundscapes is a tone that carries further than any of them: the resonant, unbroken note of the hakgediya. Made from a large marine gastropod shell, it is one of the oldest musical instruments still in active ceremonial use in Sri Lanka, and one of the few whose role has changed very little over many centuries.
What exactly is a hakgediya?
The hakgediya (හක් ගෙඩිය) is a conch shell — specifically the shell of a large marine gastropod mollusk — that has been fashioned into a wind instrument. Classified as an aerophone in modern organology, it belongs to the category the Pali liturgical tradition calls Susira, meaning instruments that produce sound through a column of air. The player blows directly into the narrow end of the shell, and the spiral interior amplifies the vibration into a low, carrying note that can be heard across open ground.
In the Indian classical system of instrument classification that also influenced Sri Lankan practice, the hakgediya sits alongside other instrument families: Ghana (idiophones), Avanaddha (membranophones), and Tat (chordophones). All four families appear together in the grander ceremonial ensembles used in Theravada Buddhist ritual art and temple observances.
How is the hakgediya used in Sri Lankan ritual and music?
Its primary home has always been ceremony rather than concert. The shell is blown at the opening and closing of Buddhist religious rites, during temple processions, and at auspicious occasions such as the commencement of important social events or the anointing of sacred images. The sound is considered purifying — it is believed to clear the surrounding air of inauspicious influences and to summon the attention of both participants and the divine.
The instrument also appears prominently during perahera processions. At events such as the Esala Perahera Festival in Kandy, the layered sounds of drums, pipes, and conch shells together create the sonic atmosphere that has defined Sri Lankan Buddhist pageantry for generations. Within that ensemble, the hakgediya's role is principally punctuating: it marks transitions, signals the movement of sacred objects, and opens ceremonial space.
In addition to Buddhist contexts, the conch shell has a long history in Hindu ritual across South Asia, where it is known as the shankha. In Sri Lanka, both traditions have shaped the instrument's ceremonial use, and the same shell — selected and prepared in similar ways — appears in kovil rituals in the north and east of the island as well.
What makes a good hakgediya, and how is it prepared?
Not every conch shell becomes a playable instrument. Traditionally, a shell is selected for size, the integrity of its spiral, and the clarity of the tone it produces when tested. The tip of the shell is carefully cut or ground away to create the mouthpiece opening; the diameter of this aperture and the condition of the interior channel determine the instrument's pitch and resonance. A skilled craftsperson can judge a shell's potential before any cutting begins — the weight, the translucency of the wall, and the depth of the spiral all carry information.
Once prepared, a hakgediya is often fitted with a metal or wooden mouthpiece to make playing more comfortable and the tone more consistent. Decorative metalwork — sometimes silver or brass — may be added around the bell and the body, particularly for instruments destined for temple use. These decorated versions are as much ritual objects as they are musical instruments.
How does the hakgediya relate to broader Sri Lankan folk music?
Sri Lankan traditional music encompasses a wide range of instruments, most made from locally available natural materials. Percussion instruments dominate — the yak bera (double-headed drum used in Kandyan dance), the thammattama, and various frame drums give the island's ceremonial music its characteristic rhythmic density. Melody instruments like the horanawa (a double-reed pipe similar to the South Indian nadaswaram) carry the melodic line, while the hakgediya holds a structural rather than melodic role.
Outside of Buddhist and Hindu ceremonial settings, Sri Lankan musicians have absorbed influences from the subcontinent — harmoniums, sitars, and tabla all appear in folk and devotional music — and from colonial-era contact with European music. The hakgediya, however, has remained largely outside this process of exchange. Its function is too specifically ritual for it to migrate easily into other genres, and its sound — sustained, untempered, and deeply resonant — does not blend naturally with melodic accompaniment.
Can visitors see or hear the hakgediya in Sri Lanka?
Yes, though the best opportunities arise in specific contexts rather than staged performances. Temple ceremonies in Kandy, Polonnaruwa, Anuradhapura, and other heritage cities regularly incorporate the hakgediya in daily rituals and during full-moon (poya) observances. The annual Esala Perahera in Kandy, held across roughly two weeks in July or August, is the most accessible opportunity for visitors to hear the instrument within its full ceremonial ensemble.
Visitors to the Kandy Tourist Information Center can often get guidance on which temples hold public-access ceremonies and on the poya calendar for the year. Cultural villages and craft markets — particularly in the Central Province — also carry authentic hakgediya shells, giving travellers a chance to examine the instrument at close range and, in some cases, purchase one as a cultural memento.
What should I know before buying a hakgediya as a souvenir?
Conch shells and items made from marine mollusks can be subject to customs restrictions in some countries under CITES (the Convention on International Trade in Endangered Species), depending on the species of shell involved. Before purchasing, confirm with the seller that the item has been legally sourced and is permissible for export from Sri Lanka and import into your home country. A reputable vendor will be able to provide documentation or guidance.
Hakgediya shells vary significantly in quality. A finely prepared instrument with clean, even tones and good decorative work reflects considerable craft skill and is priced accordingly. Mass-market versions intended purely as ornaments are widely available at much lower price points but will generally not produce the characteristic sound of a properly prepared instrument.
How does the hakgediya connect to Sri Lanka's broader cultural heritage?
The instrument is a thread connecting living Sri Lankan religious practice to traditions that predate the written record. Conch-shell trumpets appear in ancient Indian textual sources, in early Buddhist iconography, and in the decorative art of sites such as Polonnaruwa, where carvings and inscriptions document the role of music in royal and religious ceremony during the medieval Sinhalese kingdoms.
That continuity — an instrument used in recognisably the same way across more than two thousand years — is part of what makes Sri Lankan ceremonial music worth understanding rather than simply hearing. The hakgediya is not a curiosity from a distant past; it is still blown at dawn in working temples across the island, still carried in processions, and still treated as an object with both sonic and spiritual power.
