Gran Órgano (I):
violón 16’, flautado 8’, violón 8’,
flauta armónica 8’, octava 4’.

Recitativo (II):
cor de nuit 8’, viola de gamba 8’, voz celeste,
flauta octaviante 4’, tiple dulce 2’, contrafagot 16’,
trompeta 8’, fagot-oboe 8’, voz humana 8'.

Pedal:
contras 16’, contras 8’.

I/P, II/P, II/I, Octavas agudas I/I, expresión al II, trémolo, fuertes de trompetería, fuertes de flautados.

Two 56-note keyboards and 30-note pedalboard.

La 4: 430Hz. Equal temperament. Keyboards of mechanical and pneumatic transmission, pneumatic stops.

 
     
 

Organ built by Lope Alberdi in 1917. The organ builder Iñaki Oyarzabal adds a mixture in 1986 in the great organ. Renovated in 2010 by Späth organ builders in Switzerland and reopened by the organist Benantzi Bilbao on June 29th, 2010.