Yes Larry, you can use the vArranger with any midi sound module, and even with virtual midi sound modules.
BUT if you use the Ketron SD2, you will get right out of the box an amazing and well balanced sound, without any tweeking.
Also, if you want to use the Ketron styles, you need some of sounds who are only on the SD2, for example the LIVE DRUMS, who are custom drums who are not in other GM modules.
If you don't have the SD2, you will probably go with Yamaha styles, as they are more using standard GM sounds.
So, In vArranger, there is many modes depending on your midi module : KETRON SD2/KETRON SD4/GM/GM2/GS/XG, and we try to adapt the styles notes to your sound module.
Deane first used vArranger with the BK-7M sound module. This is the latest picture of this page
http://www.varranger.fr/Gallery.phpI think the sound was nice, but with the SD2, it is another story !
vArranger is not compatible with iPad.
Trident, even if I add custom needs of many musicians into vArranger, there is only ONE version of the software, so every one is always getting the new features by updates. This way, every user will benefit from the others ideas. I try to maintain something simple and not millions of options
I just bought a video camera, and I will try to show you some basics about vArranger