Tiento is a Spanish Renaissance instrumental genre that emerged in the mid‑15th century and soon became closely associated with the Iberian keyboard (especially organ) tradition.
Formally it parallels the fantasia in England, Germany, and the Low Countries, and the Italian ricercare: a free yet rigorously contrapuntal, imitative piece that explores a subject and its contrapuntal possibilities. By the late 16th century the tiento was cultivated almost exclusively for keyboard, above all for organ, and it developed distinctive Iberian variants such as the tiento de falsas (rich in cross‑relations and chromatic "false" notes), the tiento de lleno (full texture), and the tiento de medio registro/partido (exploiting the Spanish organ’s divided keyboard with solo vs. accompaniment registrational contrasts).
The genre remained central to Spanish organ culture through the Baroque era (up to Cabanilles) and its name was later revived by 20th‑century composers who paid homage to the Iberian early‑music idiom.
Iberian organ building (with divided keyboards and characteristic reeds) shaped distinctive types:
•Tiento de lleno: a full, evenly distributed contrapuntal texture.
•Tiento de falsas: expressive use of chromatic inflections and cross‑relations (false relations).
•Tiento de medio registro / partido (mano derecha/izquierda): solo vs. accompaniment textures exploiting the split keyboard.
•The genre became the backbone of the Spanish organ school through figures such as Cabezón, Aguilera de Heredia, Correa de Arauxo, and culminating with Cabanilles in Valencia.