Converting Sonus Paradisi sample sets with selectable tremulant

[davidgritter]

Several Sonus Paradisi sample sets allow the use of sampled or synthesized tremulants, controlled by a single tremulant selection switch on the mixer panel. In these cases the real (sampled) tremulant is controlled as it should be. That is the real tremulant is enabled by the logical AND of the tremulant selection switch and the tremulant control switch on the stop jamb panels. However the synthesized tremulants, after conversion to a .organ file, are simply controlled by the tremulant switch on the stop jamb, and therefore cannot be disabled when one desires to use the real tremulants. I have fixed this after conversion by odfEdit by adding a new NOT switch with its input set to the tremulant selection switch. Then the synthesized tremulants are controlled by the AND of this new switch and the tremulant switch on the stop jamb; NOT(trem_selection)AND trem_tab. All sample sets I've done this on were Hauptwerk 4.2 compatible: Billerbeck, Hilsesheim Beckerath, and Franfurt Sauer

[eturpault]

Thanks for the report. Currently I have no time to work on OdfEdit. I will try to improve the convertion of the tremulant's control in the future, based on your report.

[ahall41]

The whole point (in HW) of the selectable tremulant is to not load the tremmed samples. I've noticed an issue with the Ashton sample set from SP. On MPS Orgelseite, tim25 has converted this with the create separate ranks option. I see that this has created a single stop with both tremmed and untremmed ranks, but does not appear to be working (i.e. you only get synthetic tremulants). I ran the conversion myself to create a single rank - which does appear to work OK.

The way I understood it to work is, if you have fully sampled trems, then the samples need to go into a single rank, identified by IsTremulant. If you have partial samples, they need to go into separate ranks, controlled by separate stops, which depend on the trem switch (and a hidden NOT trem switch). At least that's the way I have done it in my scripts - which I have largely given up on as OdfEdit does such a fantastic job these days - thank you @eturpault.

[eturpault]

In OdfEdit the fact to have tremmed pipes in the same rank as the non-tremmed pipes or in separate ranks is only controlled by the option "HW to GO - place tremmed samples in separate ranks".

About your description :

However the synthesized tremulants, after conversion to a .organ file, are simply controlled by the tremulant switch on the stop jamb, and therefore cannot be disabled when one desires to use the real tremulants.

I have double checked with Billerbeck for example, it is actually defined like that in the HW ODF, OdfEdit is simply converting in GO ODF what is defined in HW ODF. For example the synthetized tremulant Tremulant000089 of the RP manual is controlled by the switch Switch019089, itself controlled by the clickable Tremulant switches of the panels, without being affected by a condition on the state of the tremulant type switch Switch012999 (Tremulant Selection (real/aftif)).
So adding NOT(trem_selection) AND trem_tab as you did is the good fix, to be done manually unfortunately.

I am glad that OdfEdit is appreciated for giving the GrandOrgue community access to the large choice of Hauptwerk sample sets.

OdfEdit v2.20 will bring a good improvement, permitting to have all audio channels converted for the recent sample sets of P.Grabowski. So far only one channel was converted. This is discussed in #72. Thanks to @rousseldenis for having obtained from Piotr Graboski the clarification about his way to link manual keys to pipes in his recent HW ODF.