Hello all. My first post on here. Sorry for writing in English in a mainly German thread. I've read the previous posts using translate.
I've recently been participating in the GrandOrgue forum on Github, so saw that Haralder (I guess) had mentioned the Niederzwehren set over there. I'm enjoying playing this sample set.
I mentioned on Github that the ODF ideally should have GCState=-1 added in a few places (as also discussed in this thread). Perhaps set author (?) Theoderich is interested too.
GCState specifies what a stop/coupler/etc should do when General Cancel is pressed. -1 means do nothing (leave the setting as it is). The on-screen console of this organ doesn't have a General Cancel, but you can access one in GO's Combination Setter panel, and couple it to some button on your console if you want. If you press General Cancel, then the Key action noises are turned off, and the coupler manual is decoupled. There is no obvious way to turn these back on again (other than find them in the Midi objects menu, and trigger them on). If you 'save' the organ with them turned off, then they will stay turned off.
Perhaps the easiest way to find the 8 places in the ODF to add GCState=-1 is to search for 'DefaultToEngaged=Y' - that is the stops/couplers which are turned on by default. Add GCState=-1 in 8 places (anywhere in the section). Section 'Windmaschine' already has the correct setting, so isn't turned off by GC.
And - nothing to do with the General Cancel issue, but just to say in English: the bottom manual is a coupling manual, intended to be permanently coupled to the other two manuals. As I only have a two manual console, I have connected my keyboards to the top two manuals, and don't use the coupling manual. If I want to couple the manuals, I can use GO's Couplers panel.