Jeff,
This .pdf prepared by Don R. Buckley may get you started in answering questions on how to use Sib with Giga and therefore the VSL.
http://home.tallships.ca/island/interface.pdfDon posted this URL as a message on the Sibelius technical help chat page in the thread named "THE SIBELIUS-GIGASTUDIO INTERFACE" in October.
I have also emailed him once or twice and he was very friendly in answering questions I had about this wonderful primer on using Sib with Giga. Finding this document gave me more confidence in deciding to get a symphonic library.
I am currently spending the day downloading my newly arrived VSL DVD's to my hard drive. Goodness, this is taking some time. What a lot of data! Meanwhile I'm reading up more on how to use it!
But like you, I conceive of music with notation software. Sequencers are hard for me to understand quickly in the fashion I am used to. A point of the article, in my summation, is that Sibelius was made feature rich for these kinds of things.
Due to the Sibelius "Playback Dictionary" feature, you can create your own custom tehnique words (Cntrl-t), which translate into midi messages, or in our case, program cahnges above individual notes on the staff, etc.
I had previously bought another library and started to create my own Dictionary for terms like "legato number 2", etc. That instruction changes the program assignment, etc. Thankfully too, you can use the House Import/Export feature to load your Dictionary to other scores. I just started to make a "VSL String Ensemble Dictionary" that maps to my GigaStudio VSL strings performance set of those loaded instruments, etc.
I imagine I'll have a number of Dictionaries and performance sets working together for the particular ensemble I'm writing for, etc.
I haven't quite yet figured out how to use the VSL "Performance Set" samples nor the Performance Tool, but I'll learn as soon as I do more with Sibelius, I hope.
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Although I got my music degree in '94, I only started composing more seriously recently after an almost 8 year break of anything musical.
Meanwhile, I started a software programming career that has allowed me to afford such nice tools like Sibelius, Giga, and now the VSL... but that 8 year break forced me to start over, on my own, in music studies at some level. I'm saying this frankly because, I feel I may not have all that much experience in living with Giga and Sibelius, and perhaps also yet creating very complicated music, etc. etc. in a manner of more advanced composers.
Buckley's article, however, has an url of the Hebrides Overture that was "rendered" in this manner.
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Sibelius software for me was the ice breaker back into music because of how easy it is to use.
Suffice to say, I've only had a very brief stint now in trying out this Sibelius to Giga method, but it seems to work. Realistically, I create two scores: a true score for printing and viewing, and another one, I name like "Serenade-GIGA-VSL.sib" which has in it, all the technique words used for proper program assignment, etc. Real musicians wouldn't appreciate the customized score. (I imagine you can, if you're anal enough in using the "hide" function in Sibelius, to meld both scores into one.)
Lastly, Sibelius's playback ability and following my score, is much better for me, than exporting MIDI to a sequencer that wouldn't follow repeat signs, or 1,2 endings, etc. or whatever notational device you can imagine like that.
-Hunter