I’d use “draw out” instead.Try not to extend the “a” sound.
I agree.It would be (or should be!) understood.
It is idiomatic. Youre meaning is: say the "a" sound with a shorter duration.Try not to extend the “a” sound.
Yes this is perfectly idiomatic. I see no reason to change it. Of course, it does not address the problem with "n"....
Try not to extend the “a” sound.
Is it idiomatic to say this?