There are two Dutch mechanical action organs by Flentrop in the Cathedral, a 1976 Choir Organ of 14 stops and a 1977 Great Organ of three manuals and 39 stops. A Flemish harpsichord and a 1912 Steinway grand piano are also used frequently.

THE GREAT ORGAN (1977)
BY FLENTROP,
ZAANDAM, NETHERLANDS

HOOFDWERK
16′ Prestant
8′ Prestant
8′ Roerfluit
4′ Octaaf
3′ Quint
2′ Octaaf
III-V Mixtuur
II-III Scherp
16′ Fagot
8′ Trumpet

ENWERK (Expressive)
8′ Prestant
8′ Bourdon
8′ Gamba (from c’)
4′ Octaaf
4′ Fluit
2 2/3′ Nasard
2′ Flageolet
1 3/5′ Terz
1′ Flageolet
8′ Schalmey
4′ Trompet

RUGWERK 8′ Prestant (from F)
8′ Gedeckt
4′ Octaaf
4′ Roerfluit
2′ Octaaf
1 1/3′ Larigot
II Sesquialter
III-IV Mixtuur
8′ Kromhoorn

PEDAAL
16′ Bourdon
8′ Octaaf
8′ Gedeckt
4′ Octaaf
2′ Woudfluit
16′ Bazuin
8′ Trompet
4′ Trompet

Mechanical key and stop action
Tremulant to entire organ
BW/HW, RW/HW
BW/P, HW/P, RW/P
Tuning: equal

THE CHOIR ORGAN (1976)

I
8′ Roerfluit
4′ Octaaf
2′ Octaaf
III Mixtuur
II Sexquialter

II
8′ Gedeckt
4′ Fluit
2 2/3′ Nasard
2′ Fluit
1 3/5′ Terz
8′ Kromhoorn

PED 16′
Bourdon
8′ Quintadeen

Mechanical key and stop action
II/I I/P, II/P

Tuning: equal

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