Transcript 11 DESCRIPTIVE SHEET OF THE REINA ORGAN (1768) A

DESCRIPTIVE SHEET
OF THE REINA ORGAN (1768)
A mechanical transmission organ placed in the choir
and built by Eugenio Biroldi in place of the previous
1768 Reina organ.
The wooden case is set against the masonry structure.
An original keyboard with 50 keys CDEFGA - f ’’’
with a short first octave and flat, not original 17 pedals CDEFGA - g#, with a short first octave always connected to the keyboard.
Disposition
Principale bassi 8'
Principale soprani 8'
Ottava
Quinta Decima
Decima Nona
Vigesima Seconda
Vigesima Sesta e Vigesima Nona
Flauto traverso soprani 8'
Viola bassi 4'
Flauto in ottava 4'
Cornetta 3 file soprani 2 2/3' + 2' + 1 3/5'
Voce umana soprani 8'
Contrabassi alli pedali 16'
Division between bass and soprano h - c’.
Wind pressure 42mm in water column.
a’ = 436.3 H2 at 16.5° and 66 per cent humidity.
Temperament 1/6 comma.
The fifths of C-G, D-A, A-E, E flat- B, B-F are tempered
at 1/6 of syntonic comma. The fifths of H-F#, F#-C#,
C#-G# are tempered at 1/2 of the syntonic comma.
The fifths of E-H and F-C are "pure" and the G#-E flat
interval is 8 cent. long in respect to the equal temperament.
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