Hello all, I have been absent a while.

So I have been thinking about Bourdons lately and and their usefulness due to their half-length construction.

Firstly, there are organs that have quite a number of stops, but don't seem to have the room for full-length 32s. Now I live in Queensland, Australia my cathedral of choice is St John's Anglican in Brisbane. It's in my opinion the most beautiful Cathedral in the country, and even has a the only large stone-vaulted roof in the country which obviously does not hurt the acoustics or beauty of the place! I had an opportunity to play on the organ there one night when the cathedral was closed, and it was truly exciting. But despite 82 stops over four manuals, there are no full-length 32s due to space constraints (the organ is quite elevated in the building). As such it has an acoustic 32' and an half-length 32' Contra Posaune.

But now I have mentioned more than is necessary to the discussion, this is surely not the only church to have space constraints like this in the organ chambers.

So firstly, assuming no cost factors, why would organs with an healthy selection of 16' stops not use a 32' Bourdon for true 32' sound (or so they can even have 32' sound)?

Secondly, by extension, with some of the big organs in the world (ones that have a good selection of 32' ranks) not use 64' Bourdons for that extra-special bit of bass? Again, there are only two organs in the world that have full-length 64s and both of them are reeds. But I am aware of organs, and have even played one, with an acoustic 64'. So again, why not do it properly with a 64' Bourdon?