Opus 56

Nov 3, 09:06 AM

Opus 56

First Congregational Church
Western Springs, Illinois
Year of Commission 1989

This organ was built three times as Opus 56, 63 and 88. The compass is 63 for the manual and 30 for the pedal.

To increase the flexibility of this one manual and pedal organ, Martin Ott added from g32 a Pommer 16’ and a Sesquialter (5 2/3’ + 3 1/5’). All manual stops have split keyboard (divided slider) between keys f#31 and g32.

*Divided Slider
When the organist transposes the right hand one octave higher, the Pommer 16’ plays at 8’ pitch. In essence the 16’ becomes the 8’; the 8’ becomes the 4’; the 4’ becomes the 2’, and the Sesquialter becomes the 2 2/3’ + 1 3/5’. By increasing the key compass to d3 (note 63) and splitting the keyboard at f# - g (notes 31 & 32), the unpleasant overlapping of notes at the middle c (note 25) is eliminated, and one has enough keys at the top end (d3) of the keyboard for most written music.

This instrument, with the exception of the Subbass 16’ section, is on casters. The keydesk can also be removed to reduce its size and make it possible to transport it in a commercial building elevator to any floor.

Footprint Dimensions: Width 54”, depth without manual keydesk 27”, depth with manual keydesk 33”, depth with pedal keyboard + bench 52”

7 stops | 8 ranks
Mechanical action | Divided sliders (*)