ROYAL FESTIVAL HALL
The organ was built during 1950–1953 to the specification of the London County Council's consultant, Ralph Downes, who also supervised the tonal finishing both in 1952–1954 and after cleaning and overhaul in 1964 and 1979 when small tonal modifications were made.
It was designed as a well-balanced classical instrument embracing a number of rich and varied ensembles which alone or in combination could equal the dynamic scale of any orchestra or choral grouping in addition to coping with the entire solo repertoire.
During the planning period, in addition to conducting discussions and trials with the builders' technical staff, Mr Downes visited a number of concert halls, and also obtained advice and help from the following leading musicians and organ experts: Felix Aprahamian, Lady Susi Jeans, Sir Anthony Lewis, George Miles, Herbert Murrill, Dr. George Thalben-Ball, Prof. C. H. Trevor, Sir Jack Westrup (England); G. Donald Harrison, Walter Holtkamp, Robert Noehren (USA); Dirk Flentrop, Dr M. A. Vente (Holland); Fritz Abend (Germany); André Marchal, L. Eugène Rochesson (France).
The reeds (except Nos. 18 and 101) were designed and voiced at Mr Downes's request by M. Rochesson. The great majority of the metal pipes are made in "spotted" metal (50% tin) down to 16ft C: only the 24 pipes of the 32ft octave extensions are made of zinc. The "frontispiece" of simulated organ pipes and associated woodwork was designed by Sir Leslie Martin (for the Council).
In 2000 the console was renovated and new coupler and piston systems were installed.
SPECIFICATION
| PEDAL ORGAN | GREAT ORGAN | |||||||||||||
| 1 | Principal | (from 54) | 32 | 54 | Principal | 16 | ||||||||
| 2 | Major Bass | 16 | 55 | Gedacktpommer | 16 | |||||||||
| 3 | Principal | 16 | 56 | Diapason | 8 | |||||||||
| 4 | Sub Bass | 16 | 57 | Principal | 8 | |||||||||
| 5 | Quintadena | (from 74) | 16 | 58 | Harmonic Flute | 8 | ||||||||
| 6 | Salicional | (from 40) | 16 | 59 | Rohr Gedackt | 8 | ||||||||
| 7 | Quintflute | (stopped) | 10 2/3 | 60 | Quintflute | (stopped) | 5 1/3 | |||||||
| 8 | Octave | 8 | 61 | Octave | 4 | |||||||||
| 9 | Gedackt | 8 | 62 | Gemshorn | (conical) | 4 | ||||||||
| 10 | Quintadena | (from 74) | 8 | 63 | Quintadena | 4 | ||||||||
| 11 | Nazard | (conical) | 5 2/3 | 64 | Quint | 2 2/3 | ||||||||
| 12 | Superoctave | 4 | 65 | Super Octave | 2 | |||||||||
| 13 | Spitzflute | (conical) | 4 | 66 | Blockflute | 2 | ||||||||
| 14 | Open Flute | 2 | 67 | Tierce | 1 3/5 | |||||||||
| 15 | Septerz | 17.21 | 3 1/5 | 68 | Mixture | 15.19.22.26.29 | 2 | |||||||
| 16 | Rauschquint | 12.15 | 5 1/3 | 69 | Sharp Mixture | 26.29.33.36 | 2/3 | |||||||
| 17 | Mixture | 19.22.26.29.33 | 2 2/3 | 70 | Cornet | 1.8.12.15.17 (middle c) | 8 | |||||||
| 18 | Bombarde | (from 19) | 32 | 71 | Bombarde | 16 | ||||||||
| 19 | Bombarde | 16 | 72 | Trumpet | 8 | |||||||||
| 20 | Dulzian | (from 38) | 16 | 73 | Clarion | 4 | ||||||||
| 21 | Trumpet | 8 | XI Sub Octave | |||||||||||
| 22 | Cromorne | (from 52) | 8 | XII Reeds and Cornet on Solo | ||||||||||
| 23 | Clarion | 4 | XIII Positive and Choir to Great | |||||||||||
| 24 | Schalmei | (from 53) | 4 | XIV Swell to Great | ||||||||||
| 25 | Cornett | 2 | XV Solo to Great | |||||||||||
| I Positive to Pedal | ||||||||||||||
| II Great to Pedal | ||||||||||||||
| III Swell to Pedal | ||||||||||||||
| IV Solo to Pedal | ||||||||||||||
| POSITIVE ORGAN | SWELL ORGAN | |||||||||||||
| 26 | Principal | 8 | 74 | Quintadena | 16 | |||||||||
| 27 | Gedackt | 8 | 75 | Diapason | 8 | |||||||||
| 28 | Quintadena | 8 | 76 | Gemshorn | (conical) | 8 | ||||||||
| 29 | Octave | 4 | 77 | Quintadena | 8 | |||||||||
| 30 | Rohrflute | 4 | 78 | Viola | 8 | |||||||||
| 31 | Rohrnazard | 2 2/3 | 79 | Celeste | 8 | |||||||||
| 32 | Spitzflute | (conical) | 2 | 80 | Principal | 4 | ||||||||
| 33 | Tierce | 1 3/5 | 81 | Koppelflute | 4 | |||||||||
| 34 | Larigot | 1 1/3 | 82 | Nazard | (conical) | 2 2/3 | ||||||||
| 35 | Mixture | 15.19.22.26.29 | 2 | 83 | Octave | 2 | ||||||||
| 36 | Sharp Mixture | 22.26.29.33.36 | 1 | 84 | Open Flute | 2 | ||||||||
| 37 | Carillon | 29.38 | 1/2 | 85 | Tierce | (tenor F) | 1 3/5 | |||||||
| 38 | Dulzian | (in Choir box) | 8 | 86 | Flageolet | 1 | ||||||||
| 39 | Trumpet | (in Choir box) | 8 | 87 | Mixture | 22.26.29.33 | 1 | |||||||
| V Tremulant | 88 | Cymbel | 38.40.43 | 1/5 | ||||||||||
| VI Positive on Great | 89 | Hautboy | 8 | |||||||||||
| VII Swell to Positive | 90 | Vox Humana | 8 | |||||||||||
| VIII Solo to Positive | XVI Tremulant | |||||||||||||
| 91 | Bombarde | 16 | ||||||||||||
| 92 | Trumpet | 8 | ||||||||||||
| 93 | Clarion | 4 | ||||||||||||
| XVII Octave (16ft, 8ft and 4ft stops only) | ||||||||||||||
| XVIII Solo to Swell | ||||||||||||||
| CHOIR ORGAN | SOLO ORGAN | |||||||||||||
| (On Positive keys) (Enclosed) | (Enclosed) | |||||||||||||
| 40 | Salicional | 16 | 94 | Diapason | 8 | |||||||||
| 41 | Open Wood | 8 | 95 | Rohrflute | 8 | |||||||||
| 42 | Stopped Wood | 8 | 96 | Octave | 4 | |||||||||
| 43 | Salicional | (conical) | 8 | 97 | Waldflute | (conical) | 2 | |||||||
| 44 | Unda Maris | (conical) | 8 | 98 | Rauschquint | 12.15 | 2 2/3 | |||||||
| 45 | Spitzoctave | (conical) | 4 | 99 | Tertian | 17.19 | 1 3/5 | |||||||
| 46 | Open Flute | 4 | 100 | Mixture | 19.22.22.26.29.33 | 1 1/3 | ||||||||
| 47 | Principal | 2 | 101 | Basset Horn | 16 | |||||||||
| 48 | Quint | 1 1/3 | XIX Tremulant | |||||||||||
| 49 | Octave | 1 | 102 | Harmonic Trumpet | 8 | |||||||||
| 50 | Sesquialtera | 26.31 | 2/3 | 103 | Harmonic Clarion | 4 | ||||||||
| 51 | Mixture | 29.33.36.40 | 1/2 | |||||||||||
| 52 | Cromorne | 8 | COMBINATION COUPLERS | |||||||||||
| 53 | Schalmei | 4 | (rocking tablets) | |||||||||||
| IX Tremulant | XX Great and Pedal Combinations coupled | |||||||||||||
| X Choir on Solo | XXI Swell on General Foot Pistons | |||||||||||||
| ACCESSORIES | ||
| Eight foot pistons to the Pedal Organ | Sequencer, operating general pistons | |
| Eight pistons to the Choir and Positive Organs (combined) | General crescendo, with indicator | |
| Eight pistons to the Great Organ (duplicated by foot pistons) | Balanced expression pedals to Choir, Swell and Solo Organs | |
| Eight pistons to the Swell Organ | ||
| Eight pistons to the Solo Organ | The pistons are instantly adjustable, with 8 divisional memories and 128 general memories | |
| Eight general pistons and general cancel | The general crescendo pedal has one fixed and three adjustable settings | |
| Reversible pistons:I-IV, VII, VIII, XIII, XIV, XV, XVIII | ||
| Reversible foot pistons:I-IV | The actions are electro-pneumatic | |
| Full organ piston and foot piston, with indicator | The manual compass is 61 notes; the pedal compass is 32 notes |