Irish traditional music, or 'trad,' is built around the fiddle, uilleann pipes, tin whistle, button accordion, concertina, the goatskin frame-drum bodhrán, and unaccompanied voice. The instrumental core is three dance forms: the 6/8 jig, the 4/4 reel, and the syncopated 4/4 hornpipe. Musicians string several together into 'sets' — one tune leading into another for five to ten minutes without stopping — and each pass through the melody carries different ornamentation (cuts, rolls, and cranns) that a player varies improvisationally. Alongside this instrumental strand runs sean-nós, the unaccompanied 'old-style' singing that shares the tradition's cultural centre but sounds nothing like it.

Trad took its modern shape between the seventeenth and eighteenth centuries as older Gaelic sung poetry met dance tunes imported through European trade. The Great Famine of 1845 to 1852 halved the tradition's population, and the emigration that followed carried the music to Boston, New York, and Sydney, where Irish pubs kept the flame alive — and later exported it back to Ireland during the twentieth-century revival. The 1951 founding of Comhaltas Ceoltóirí Éireann and its Fleadh Ceoil national competition institutionalised the music as a state cultural asset.

Listen first for the 'set' structure: a jig runs three or four minutes, changes key, becomes another jig, then flips into a reel. A single track can run seven to ten minutes without a vocal break. Then listen to how a fiddler and a piper play the same melody with completely different ornamentation, so two lines of the same tune become a double helix. The uilleann pipes' regulators — chord keys pressed with the wrist — occasionally sound quiet harmonic stabs beneath the melody, and that is where the instrument reveals its architectural depth.

Start with The Chieftains' 'The Chieftains 4' (1973), the clearest single-shot view of the pipes-fiddle-flute-harp-bodhrán ensemble template. Then Planxty's 'Cold Blow and the Rainy Night' (1974), the perfect balance of instrumentals and English-language ballad. For something more contemporary, Altan's 'Island Angel' (1993) shows the Donegal fiddle tradition at full speed. Hearing this live in a pub session is honestly the best gateway.

'Jig' is called port in Irish, and slow jigs are port mall (slow port). Uilleann means 'of the elbow' in Irish — the pipes are inflated by a bellows tucked under the right arm rather than blown by mouth. The waiting list for a full concert set of uilleann pipes from top makers (Rob Iarns in Boston, Stuart O'Connor in Scotland) currently runs over ten years, with prices above ten thousand euro.