Complex sentence: In Asia, he advised young composers to borrow from Western traditions, saying it will help them speak to international audiences, but he insisted that the soul of their music as well as many of its techniques must come from their own soil.
Split into simpler sentences: In Asia, he advises young composers to borrow what they can from western traditions, saying it will help them speak to international audiences. But he insists the soul of their music as well as many of its techniques must come from their own soil.