No-one posts in the Yamaha or Roland sections because several well established sites have LONG been catering to those users elsewhere...
I don't think there is an independent Ketron Users Forum anywhere, is there? And manufacturer sponsored sites always leave you with a bad feeling of either they don't ALLOW negativity on the site, or you never feel you are getting sufficient response, seeing as how it IS an official site.
Independent is the way to go, IMO.
I was under the impression that the guitar loops were in the Audya's ROM, rather than read off of disk. Something to do with the speed of them being read needing to be MUCH higher than the drum loops, as many choices as need to be instantly available...
This, I think, also lies at the heart of why there is an incomplete selection of guitar chords. The more chords recorded, the more of them have to be buffered and ready to go in an instant, as you play. Drums don't have this issue, they don't have to constantly change as we change chords every beat or two...
I think technology needs to get a generation or two faster, before we are going to be able to see full implementation of this feature, and before User Guitar audio loops become a full reality.
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An arranger is just a tool. What matters is what you build with it..!