Keyboard - Digital Download SKU: OX.9780193202382 Composed by Gabriel Erkoreka. Score. 17 pages. Oxford University Press Digital #9780193202382. Published by Oxford University Press Digital (OX.9780193202382). ISBN 9780193202382.These four pieces could be considered a set of variations though the composer has spoken of them rather as photographs of the same object taken at different angles. The work as a whole is based on 'Tiento' by the Renaissance composer Antonio de Cabezon. Erkoreka suggests that his piece offers a new vision of the earlier piece. There is also a version for accordion.