Usually, i follow the rule “to keep real instruments live-recorded and unnatural ones - synthesized” (i know, it doesn`t sound good…)
…but…
How?
I mean, I can imagine how to do it with piano sound, but what about winds, for example? Or violin?
p.s. I`m not talking about things like “use better VSTi” because…you know…it cannot do your job.
p.p.s. Sorry for my english.
p.p.p.s.Вопрос к русскоязычным: нужно ли переводить мой бред?
you can definitely achieve a realistic violin rendition with virtual instruments: it’s about picking the right patch for each articulation, making sure to have dynamic X-fade within your sustained/legato patches and enough round robin for staccato/spiccato repetitions.
I would like to invite you to check this tutorial:
Hope it helps
Edit: almost forgotten, please have a look at VI Control, it’s a great community where you will find information about the art of creating MIDI mockups.