It so easy watch their interviews and listen to the pronounciations ^_^

It's exactly as ExoticELF125 explained. Just listen closely to how him (and all the members) pronounce their names ^.^
I still kinda have hard time with Baekhyun's name...I mean, I know how it's pronounced, it's just super awkward to say out loud though .-.

Like ow, but add a t at the beginning lolol that's how I do it xDD

i don't know too, i pronounce it taeo~