a difficult American&Canadian dialect or accent to me

"Martin", the second syllable 'tin', in British or Austrian pronounce like a solid 'ten'

While as in the America or Canada, the 'tin' sounds more like a 'en', i.e. 嗯, but if you pronounced a solid 嗯, you are quite wrong , there is a short leading sound before 'n'. ~n. 

Took me quite some practice to properly speak out the leading, maybe a fraction of a full beat. 一種聲斷氣不斷的音. 不能讀過頭, 還要讓人清晰的聽出來.

Similarly, Britain, Button, in contrast to : 'Boston' where it is a solid: ten/ton/tn..    

Wish I made myself clear... ...,

Martin, pronounciation from Youtube:, how do you feel?

Boston: in Youtube