Martin Ott Opus 69 at Union Church of Hinsdale
Martin Ott Opus 69 was commissioned in 1991 for Union Church of Hinsdale in Illinois. The specification gives 14 stops, 17 ranks, one extension, and mechanical action.
Reading the sanctuary: the chapel wall at Union Church
The congregation first considered building a balcony for the organ and choir, but the archive describes that plan as prohibitively expensive. The funds were used instead for Opus 69, which was placed on the right wall of the Union Church chapel. From the console, the organist had a side view of both the chapel entrance and the altar. Opus 69 was planned for the worship space at Union Church of Hinsdale. The most dependable room clues are concrete ones such as altar, balcony, windows or choir position; a general claim about the building's sound requires more evidence.
For Opus 69, visible surroundings and measured acoustics must be kept separate. One can be checked against photographs; the other requires data or testimony from the room.
14 stops and 17 ranks: the scale of Opus 69
The short specification lists 14 stops against 17 ranks. A rank is a set of pipes; a stop is the control through which the organist brings a resource into use. The scale sits between a practice organ and the largest church installations. It leaves open how the builder divided resources among principals, flutes and reeds. How many manuals the player had is not stated here. The page also counts 1 extension, meaning that at least one rank served more than one pitch or stop function. Without the stop names and pitches, any description of color would run ahead of the evidence.
There is a 3-rank gap between the two totals for Opus 69. It signals that stop and rank counts are structured differently, without revealing the exact compound stops involved. The page separately lists 1 extension. The figures invite questions that only the stop names can settle.
Keys and windchests: the chapel wall at Union Church
Pressing a key on a mechanical organ sets a train of parts in motion until a pallet opens at the windchest. That is the arrangement named for Opus 69. The surviving description does not record touch weight, wear or later maintenance.
Because the keydesk was joined to the case, the player's position formed part of the architecture of Opus 69. The action record from Union Church of Hinsdale is precise on this point: later regulation cannot be read from that layout alone.
The organ as an object: the chapel wall at Union Church
The oak case had an attached keydesk. Both manual divisions were under expression except for the facade Oktave 4-foot stop. These details help separate Opus 69 from nearby commissions in the firm's catalogue. The page stops short of a complete technical survey, which is a different kind of document.
Materials named for case or keys should not be treated as a tonal description. They tell us about craft and appearance; pipe material and voicing require their own evidence for Opus 69.
Musical life around the instrument: the chapel wall at Union Church
The source names Michael Surratt as music director. At Union Church of Hinsdale, the organ may have met hymn singing, choral accompaniment and solo repertoire, but the project history must name the intended roles. Dated programs would show how Opus 69 was used after dedication. A dedication program has not yet been found for this project.
A specification describes potential; performance records describe use. The second kind of evidence is still missing for Opus 69.
Evidence, images and unanswered questions for Opus 69
The company entry for Opus 69, preserved from February 6, 2020, provides the project facts used here. The associated gallery contains 1 image. All belong to the dated gallery attached to the Opus 69 page. Photographer names are not attached to these images. The page proves their association with the project, but it does not establish present condition or ownership. The best additions would be a credited recent image and the full specification.