aeolus Aeolus is a synthesized (i.e., not sampled) pipe organ emulator that should be good enough to make an organist enjoy playing it. It is a software synthesizer optimized for this job, with possibly hundreds of controls for each stop, that enable the user to "voice" his instrument—first presented at the 2nd LAD conference in Karlsruhe, the end of April 2004.
This should explain where EX24 originated from and how you can create an ex24 soundbank.
What is sfArk?
It's a lossless audio compression format optimized for SoundFont files. sfArk is free for non-commercial use. Programs to decompress sfArk files exist for Windows, macOS X, and Linux platforms.
sfArk is a closed source format created by a now-defunct company called Melody Machine. It's like a zip file for SoundFont files. When the company died, they also removed the extractor and decompressor utilities. These utilities are around but almost impossible to find. Having spent 2 hours searching for the utilities, I've decided to host them to save others time in the future!