There a good number of non western users who use orchestral instruments.
Every musician is suppose to see thing thru his or her own window.
IMO, one's school of music plays an important role in perceiving things those are beyond one' school.
Often my school helps me to see the World from my own window. (Good if learning curve does not bother one )
Say, I am Carnatic musician. When a friend of mine was listening one of my composition, he asked "what chords are these, in this progression?"
I said "Sorry I don't name them". He was a Guitarist having traditional training. He was not so dumb to see me rude.
He asked me how did I do them. I said "I go by ears and always my ears distinguish a conchord and a dischord"
I was learning those western stuff for a while and felt it was not a wise thing for me, for the reason that I am not going to perform any symphony in some western country. Really the learning curve bothered me.
IMHO, a life time is not enough to explore the wonder world of music irrespective of the Genre.
In this point of view, I use to write songs what makes sense for me, when it comes for polyphony or harmony, where my traditional school does not entertain.
When I tried to learn Glissando, Legato, Portamento, what I could I understand was "kind of pitch bends". I am sorry I really don't know whether I am making sense. I fail to understand them where I understand / handle fifteen prominent types/styles of pitch bends in Carnatic. Probably the tutorials or articles I could find may be less descriptive in aesthetic beauty of those things, what a musician really need to grasp.
Likewise vibrato, tremolo , etc.,
My intention is to request musicians who have a western tradition in a way or the other, to explain little technical and aesthetic aspects of above said parameters (?!!)
A person like could be benefited from those posts, samples if possible, where a non western GPO user could understand these concepts, to put them in use and to tailor them.
I humbly request you friends, kindly put up with the faulty expression, if you find one in this post.