The Cathedral Organ
Casavant Frères Ltée. (1972, Opus 3145)
Stoplist

GRAND ORGUE                       RÉCIT
   16' Montre             56         16' Bourdon            56
   16' Bourdon            56          8' Flûte bouchée      56
    8' Montre             56          8' Salicional         56
    8' Flûte à cheminée   56          8' Viole de Gambe     56
    8' Flûte harmonique   56          8' Voix céleste       44 tc
5 1/3' Grosse Nasard      56          4' Principal étroit   56
    4' Prestant           56          4' Flûte traversière  56
    4' Flûte ouverte      56          2' Flûte conique      56
3 1/5' Grosse Tierce      56          V  Cornet  37 notes  185
2 2/3' Nasard             56          V  Plein Jeu         280
    2' Doublette          56        III  Petite Fourniture 168
    2' Quarte de Nasard   56         16' Basson             56
1 3/5' Tierce             56          8' Hautbois           56
    V  Cornet  37 notes  185          8' Voix Humaine       56
   IV  Grosse Fourniture 224          4' Clairon            56
   IV  Fourniture        224             Tremblant
   IV  Cymbale           224
   16' Bombarde           56       POSITIF
    8' Trompette          56         16' Quintaton          56
    4' Clairon            56          8' Montre             56
                                      8' Bourdon            56
PÉDALE
                               4' Prestant           56
   32' Soubasse  (w)      32          4' Flûte              56
   16' Motnre             32      2 2/3' Nasard             56
   16' Soubasse  (w)      32          2' Doublette          56
    8' Prestant           32          2' Quarte de Nasard   56
    8' Bourdon            32      1 3/5' Tierce             56
    8' Flûte     (w)      32      1 1/3' Larigot            56
5 1/3' Quinte             32         IV  Fourniture        224
    4' Octave             32         IV  Cymbale           224
    4' Flûte              32         16' Douçaine           56
    2' Flûte              32          8' Cromorne           56
   VI  Fourniture        192          4' Petite Trompette   56
   32' Bombarde  L/2      32             Tremblant
   16' Bombarde           32
   16' Basson             32       BOMBARDE
         (cylindrical)                V  Cornet  49 notes  245
    8' Trompette          32       VIII  Plein Jeu         448
    4' Clairon            32       VIII  Harmoniques       448
    2' Chalumeau          32         16' Bombarde           61 en-chamade
                                      8' Trompette          61 en-chamade
                                      4' Clairon            61 en-chamade

4 manuals. 5 divisions. 73 stops. 126 ranks. 73 registers. 6616 pipes. 56-note manuals. 32-note pedals.

Slider chests. Mechanical key action. Electric stop action.

Balanced swell shoes/pedals, standard AGO placement. Combination Action: Remote pneumatic/mechanical capture system. AGO Standard (concave radiating) pedalboard. Reversible full organ/tutti thumb piston. Reversible full organ/tutti toe stud. Combination action thumb pistons. Combination action toe studs. Coupler reversible thumb pistons.
The cathedral organ is a four manual mechanical action Casavant, Opus 3145. It has 6,616 pipes, 126 ranks and 73 stops. It was designed by Larry Phelps and installed in 1972.  It is the largest mechanical action organ in North America. Many prominent organists have concertized on the instrument including Dame Gillian Weir, Stephen Hamilton and others.

Many outstanding choirs have performed in the church and have used the organ in their performances. Among these groups have been, The American Boy Choir, Christ Church, Oxford, The Ile de France Children's Choir and Orchestra, The Choir of the University of Virginia and many others.

The organ is prominently used on a regular basis in performances by Cathedral Organist, Philip Faraone with the Gregorian Concert Choir, the resident choir of the cathedral under the direction of Monsignor Anthony Mancini, Music Director and Rector of the Cathedral.

It was the former Music Director of the cathedral, Dr. C. Alexander Peloquin who conceived of the design and installation of this magnificent instrument. His vision for an organ worthy of this sacred space is a lasting legacy of his tenure here at the cathedral of Saints Peter and Paul.