Pibroch

Piobaireachd (anglicised as pibroch) is the classical art-music repertoire of the Highland bagpipe. Each piece opens with an unhurried, almost meditative theme (the urlar), then proceeds through a sequence of increasingly elaborate variations (siubhal, taorluath, crunluath) with each layer doubling the ornament density. Performances often run twenty to thirty minutes. Behind the melody the drone pipes hold a constant low chord; the chanter's notes are not tempered to Western pitch, and the resulting beating between melody and drone is part of the music's character.

Pibroch developed in the Highlands in the fifteenth to seventeenth centuries under the patronage of the great clan chiefs, with the MacCrimmons of Skye — hereditary pipers to the MacLeods — its most famous family of composers. After the Battle of Culloden (1746) and the proscription of Highland culture, pibroch went into decline. Nineteenth-century revival, formalised by competitions sponsored by the Highland Society of London, preserved the repertoire, and pibroch is now the highest qualification a Highland piper can attain.

Sit with the urlar and let it set the harmonic and melodic frame before judging the variations. The beats between drone and chanter are most audible in the slow variations; in the fast ones the ornaments pour past the ear and create the illusion of acceleration.

Lament for the Children, attributed to Patrick Mòr MacCrimmon in the seventeenth century, is one of the canonical entry points. Recordings by William McCallum or Roderick Cannon give clean readings.

Pibroch's variation-set form runs in parallel to the theme-and-variations practice in European Baroque music, an instance of Celtic and continental traditions developing similar formal logics independently.