Biribilketa is a Basque word that musically corresponds with 'ritornello' or 'passacaglia'. The piece is made up of various ingredients: hidden alphabetical codes, formal essences of a passacaglia, reminiscences of the alboka(a Basque folk instrument), and silence.
| Arrangement | Chamber Group |
| NumberOfPages | 16 |
| Publisher | Oxford University Press |
| Contributors | Erkoreka, Gabriel(Composer) |
| ISBN | 9780193563957 |