New specification

Specification of the rebuilt organ, with changes noted

Existing pipework mostly by J.W. Walker (various, 1850-1953)
PPO = Principal Pipe Organs (1995)

Manual compass 61 notes, pedal 32 notes

Great
Double Open Diap 16 New
Open Diapason I 8 New, to replace existing
Open Diapason II 8 New, to replace existing
Wald Flute 8
Principal 4 New, to replace existing
Harmonic Flute 4
Twelfth 2 2/3 New
Ffteenth 2 New, to replace existing
Mixture IV New, to replace Mixture III (PPO)
Trumpet 8 PPO  to be re-voiced
Swell  enclosed
In new expression box
Bourdon 16 Existing Gt Contra Gedackt, returning to original function
Open Diapason 8
Stopped Diapason 8
Viola da Gamba 8
Voix Celeste  Ten C 8
Principal 4
Flute 4
Fifteenth 2
Mixture IV New, to replace Mixture III & Sharp Mixture II (both PPO)
Contra Fagotto 16
Trumpet 8
Oboe 8
Vox Humana 8
Clarion 4
Choir  enclosed In new expression box
Violin Diapason 8
Lieblich Gedackt 8
Dulciana 8 Pipes from existing unit 16 & 8, now on slider soundboard
Vox Angelica  Ten C 8
Flute 4 Chimney flute of uncertain provenance
Nazard 2 2/3 New, to replace existing (PPO)
Piccolo 2 New, to replace Flageolet (PPO)
Tierce 1 3/5 New, to replace existing (PPO)
Orchestral Oboe 8
Clarinet 8
Tromba 8 unenclosed
Pedal
Acoustic Bass 32 New ext of Open Wood, lowest 12 quinted
Open Wood 16
Violone 16 New, transmission from Gt Double Open
Bourdon 16
Echo Bourdon 16 Transmission from Sw Bourdon
Dulciana 16 1-12 of existing Ch unit + 13-32 new, independent & unencl.
Principal 8 to be re-voiced
Octave Wood 8 Ext of Open Wood, reconnected
Bass Flute 8 Ext of Bourdon
Fifteenth 4 Ext of Principal
Octave Flute 4 Ext of Bourdon/Bass Flute
Trombone 16 }
} Transmission and extension from Ch Tromba
}
Tromba 8
Tromba 4

Couplers & accessories

Usual couplers
Octave, Sub-octave, Unison Off to Swell and Choir
Tremulants to Swell and Choir
Cymbelstern

Eight thumb pistons to each manual division
Eight toe pistons to Pedal and Swell
Eight General thumb pistons
Great & Pedal combinations coupled, Generals on Swell toe pistons
Multiple memory levels
Stepper to General pistons

 

Director of Music’s thoughts

Our priority in all aspects of the rebuilding of the organ is to make it function well and dependably in the long term. New 61-note slider soundboards with inbuilt actions will replace both the failing electro-pneumatic manual soundboards and the expeditious assortment of off-note chests by which the manual compass has been extended and some Choir upperwork added. New expression boxes for Swell and Choir will accommodate the larger soundboards and will contribute, along with new and modern and compact wind and electrical systems, to an orderly and efficient new layout with improved maintenance access. Apart from the majority of the pipework, only the console, the blower and a number of Pedal chests are being retained and refurbished.

Tonally, the existing set-up is large and comprehensive with some splendid colours, but much of it lacks beauty, clarity and coherence. The most significant and exciting development is an all-new Great principal chorus, including a 16-foot Double Open Diapason which not only befits the organ and the building, but will be playable as a very welcome metal 16’ Pedal flue stop, and enables the current Great 16ft rank to be restored to its original and rather useful function of Swell Bourdon. Five ranks of Swell mixture-work over two stops will be replaced with a single stop of four new ranks, and the Choir upperwork will also be replaced with new. The Choir Dulciana rank, though useful in its current configuration as a 16’ and 8’ unit on Choir and Pedal, is to be rationalised for reasons of Choir box space and consistency of wind supply; the bulk of it becomes a ‘straight’ 8’ stop on the Choir main soundboard, while the ‘Haskelled’ 16’ octave forms the basis of an otherwise new, independent Pedal stop.

Just one sonority is being deleted altogether, to free up precious space, namely the independent but ineffectual Pedal Quint; in its stead an Acoustic Bass of nominal 32’ pitch will be derived from the Open Wood with a quinted bottom octave. At the same time an 8’ extension of the Open Wood, disconnected when the 8’ Principal arrived but never physically removed, is being re-instated for the sake of a few occasions when that timbre is the optimal one. The gentle but clear stop which is to become the Swell Bourdon will continue to be available as a Pedal stop in its new home, but the well-mannered and not especially colourful Swell Contra Fagotto will not, being superseded in that role by what we are calling Violone – the Pedal derivation of the new Great 16’ Diapason.

A further and most pleasing benefit derives from the new Great chorus. The plethora of new pipes and the grandeur of the 16-foot Diapason are being exploited by the designers to replace the “temporary” 1953 façade with one that is aesthetically enhancing and fully conceals the innards of the organ. This will consist simply of the largest Great pipes, cast in tin-rich alloy, polished, and arranged artistically, with variable lengths in the pipe ‘feet’ giving interest to the line of pipe mouths. No pipe decoration or casework was considered necessary. The opportunity will be taken for some once-in-a-generation maintenance to the gallery, and for the removal of a decidedly unaesthetic scaffolding bridge currently giving access from north clerestory to south, to be replaced with ladder access on the south side (the north being accessible via the tower staircase).

Mander.09(Pres)18-12-17

A Cymbelstern, which will be audible rather than visible, will be created from six handbells acquired by our East London-based organ builder upon the closure in 2017 of the Whitechapel Bell Foundry.

Last but not least, the feet-operated half of the detached console will be rebuilt for ergonomic reasons, and an adjustable bench and a smart brass strip-light fitting will be provided. The console also gains a new combination system, increasing the number of pistons on each division to eight and providing a large number of memory levels and a stepper.

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