I just got a ketron vega, I love it, but i am confused when it comes to some things. I have some questions.

-What exactly is the vocalizer function?

-What exactly do people mean when they refer to styles?

-Can the Vega use sounds from other Ketrons, or even other companies, or is it confined to use its own sounds?

-Where can I find more and "better" sounds?
***(big question)- Can I change the sound on the lower 1/2 of the keyboard(in other words to the left of the split), For example, Have 2 lead sounds such as Kanun and oud, Kanun being on the left of the split and the oud being on the right?

-what is the diffrence between a normal preset and a user voice?

-how can I access some of the secondary functions, like the ones printed in green?

thank you for your time