Segovia, 1772 [Hauptwerk]

One of the largest organs from the baroque period preserved in Spain: This instrument represents the climax of the Iberian organ building style. 

As is true for all old Spanish organs, Segovia is an organ with quite a narrow use. But for that particular use - the vast musical repertoire of the Spanish baroque - it is extraordinary for its rich stop list, range of sound colors and effects, and especially for its enormous echo possibilities. The organ has two facades, creating a pronounced echo effect when the Organo Mayor plays towards the listeners in the quire (the front facade of the instrument), while the Organo Respaldo sounds in the opposite direction from the quire into the side isle (so the listeners in the quire hear only reflections off the side vaults and walls). Several stops, namely the Flautat, Trompeta batalla and Duzaina, are mounted directly on the rear facade, providing the most distant tone to the audience and creating a dramatic contrast to the facade reeds of the Organo Mayor. The effect could hardly be greater. It is also worth noting that it was the Echevarria organ building family who used horizontal facade reeds for the first time in the world.

In addition to the Organo Mayor and Organo Respaldo, the organ has a Cadereta division located deep inside the base of the organ case and capable of creating another kind of an echo. The original contract gives a detailed description of what the Cadereta's design should be in order to respond properly to echo each register of the Organo Mayor. The Cadereta is enclosed in a box that can be opened via an unbalanced pedal to the left of the pedalboard. The Favot-Obue and the Violon of the Cadereta are not enclosed on the original instrument for practical reasons - the pipes are too high to be enclosed in the limited space available for the box. We have chosen to enclose them in the Hauptwerk model.

The pedal division has one flue stop with 9 diatonic pipes of 16-foot pitch. The Organo Mayor is permanently coupled to the pedal, but for greater versatility we have chosen to make the pedal 16' stop mutable via a dedicated switch on the Simple tab so that the pedalboard can be used to play the Organo Mayoralone. This may be useful when performing music written for short octave, where some left hand intervals are too great to play on a diatonic bass octave and the pedal must be used to "help" reach the bottom note. (Of course, Hauptwerk's native short-octave function can also be used with the model.)

The organ speaks on 74 mm of water column pressure. The temperament is 1/5 Pythagorean comma "with some proprietary modifications" according to Joaquin Lois. After analyzing the pitch of the recorded samples, the nearest temperament seemed to be a Schlick (Vogel) temperament, which is indeed close to a modified 1/5 comma meantone.