I've seen different people on the internet play middle eastern flutes like the Ney and Kaval either with their left hand or right hand closer to the mouth. I'm unsure which of these is best for me to learn (also considering the future possibility of learning other flutes as well). Is there one particular way that is "standard" or "best"? Are flute types for both hand positions generally available for sale?
Also, is there a difference in this regard between middle eastern flutes like Ney and Kaval, and Western flutes?
What explains that some people play with left hand on top and others with right hand on top? Is it because they are left- or right-handed respectively? I would guess that whether one is left- or right-handed shouldn't matter much in this regard?