The organ of St. Paul’s was built in 1963 by the firm ‘Vincenzo Mascioni and Sons’ and substituted the original Roosevelt organ (which is now owned by the church of Gesu Bambino a Sacco Pastore in Rome). It has an electric transmission and is a powerful and versatile instrument, having 40 stops divided among three manuals and a pedal board. Like all Mascioni instruments of its time it has a eclectic style and adapts well to a wide repertoire. The console is situated in the left aisle, in front of the St. Augustine Chapel, while the pipes are placed in the corner between the right aisle and the apse.
The organ is used frequently for recitals as well as services, and it has been played by many noteworthy organists, including Martin Sander, Daniel Roth, Josep Solé Coll, titular organist of St Peter’s Basilica and the English organists Stephen Farr and Christopher Herrick, as well as many others.
| I Organo Positivo | III Recitativo – Espressivo | II Grand’Organo |
| 1 Principale 8′ 2 Corno di notte 8′ 3 Flauto 4′ 4 Nazardo 2 2/3′ 5 Ottavino 2′ 6 Terza 1 3/5′ 7 Cromorno 8′ 8 Tremolo |
19 Controgamba 16′ 20 Diapason 8′ 21 Bordone 8′ 22 Salicionale 8′ 23 Principale 4′ 24 Ottavina 2′ 25 Larigot 1 1/3 26 Ripieno 5 File 1′ 27 Tromba Armonica 8′ 28 Oboe 8′ 29 Chiarina 4′ 30 Voce Celeste 31 Tremolo |
9 Principale 16′ 10 Principale 8′ 11 Corno Camoscio 8′ 12 Flauto Traverso 8′ 13 Flauto Camino 4′ 14 Ottava 4′ 15 Duodecima 2 2/3 16 Decimaquinta 2′ 17 Ripieno 4 File 1 1/3 18 Tromba 8′ |
| Pedale | Unioni | Combinazioni – Annullatori |
| 50 Basso Acustico 32′ 51 Contrabasso 16′ 52 Principale 16′ 53 Subbasso 16′ 54 Controgamba 16′ 55 Principale 8′ 56 Flauto 8′ 57 Ottava 4′ 58 Trombone 16′ 59 Tromba 8′ 60 Clarone 4′ |
32 I – P 8′ 33 II – p 8′ 34 III – p 8′ 35 III – I 36 III – II 37 I – II 38 I – p 4′ 39 II – p 4′ 40 III – p 4′ 41 I – 16′ – I 42 I Ann 8 I 43 I – 4′ – I 44 II – 4′ – II 45 III – 4′ – II 46 III – 16′ – II 47 III – 16′ – III 48 III Ann 8′ III 49 III – 4′ – III |
Ann. Ancie I Ann. Ancie II Ann. Ancie III Ann. Ancie Ped. Ann. Generale Ancie Ann. Ripieni Ann. Mutazioni Ann. Superottave Ann. Subottave |