"Will that give me some of those complex filters/layers etc that
you spoke of , that translator may well miss ?"
I can't recall if any of the demo sounds uses filters. Again, it's not a common element in VSL patches, and I think it's confined to the brass instruments. I'm not sure what the demo has in this regard.
But any perf-legato sound has numerous samples. It's a worthy test for Translator. And actually, it will be more challenging to get modwheel layers correct. Often the layers (dimensions) are in place, but the wheel must be manually assigned. Personally, I've never had a perfect modwheel translation -- I had to tweak after the fact. "Days of work?" If you're converting the whole library, more like weeks of work. Because the porting over of sheer data isn't that fast, and then you must test each instrument by itself.
And here's the problem you're going to face when it doesn't work: the owner of Chicken Sys --great guy -- will take the name of the file, ask that you send it to him in some format, and then he'll analyze it and perhaps come up with a fix. That takes time. I waited for several months for a pretty basic fix.
After three years with this program, I started to feel like Translator was deemed "close enough" by the company to be released, and now it relies heavily on user feedback for improvement, on a per instrument basis. I understand why this field would demand that.
But I'm a bit saddened that Chicken Sys promises 100% accurate conversions. That simply does not agree with my three years' experience with this product. And hey, I like Translator. I'm glad I have it. It's just that people like you, leperlord, are being lead to buy it with heightened expectations.
"will it simply be a matter of the filters/layers etc...werent translated , so it wont even load , or give an error , or once again just a matter of good ears/aural judgement ."
The answer is, "all of the above." *Most* often, Translator converts the program as best it can and leaves you to play the results. And you need not have a perfect ear to tell that something is wrong, particularly when you look for keyswitches and they're not there, or you move the modwheel doesn't change the sound.
I've never gotten a prompt that says, "Some parameters did not convert." It doesn't give you anything near that.
Lastly, Translator is the single most crash prone program I have ever used in nineteen years of computing. It simply locks, offers some inscrutable prompt, and disappears. Translator on Mac is the only program I have on my Mac that crashes regularly. Its chief benefit is a quick reload. Load, crash, reload, fidget, tweak, crash, reload. Hurray for fast reloads.
My best experiences with Translator came with the Roland, Vitous, and Kurzweil libraries. The simpler the program, the better the conversion.
At this point, leperlord, if you're planning to just convert someone else's library on the sly, you'll get what you pay for. Otherwise, it's best you pick a format and buy it natively. There are better things to do with your musical ability that sweat out issues like this.
Cheers.