Fratres

Fratres is a composition by the Estonian composer Arvo Pärt, existing in versions for a wide variety of instrumentations and exemplifying Pärt's tintinnabuli style of composition. Structurally, the piece consists of a set of eight or nine chord sequences, separated by a recurring percussion motif. The chord sequences themselves follow a clear pattern, and while the progressing chords explore a rich harmonic space, they nevertheless appear to have been generated by means of a simple formula.