don't worry, it can be heard...
but...why? why borknagar, please? one of my fav groups, i'll have some nightmares tonight, I'M SURE!
because were you able to listen to the entire song?
sorry i wasn't, i died at the beginning of the "ohoh" part
being serious, you can have some singing lesson, of course.
ear can be trained, and voice too.
if a person goes out of tune is 99% a ear problem. there are no naturally false persons (is it right? i've searched on the dictionary and it says false note for a note of tune, can it be referred also to people?), if they have problems in intonation is because they cannot hear themselves rightly.
but honestly, singing is also a natural gift, there are persons who have this gift also without studying, and some who haven't. you can get better of course, but with a lot of study and hard work, but i don't think you'll never reach the perfect intonation. does it worth the trouble?