hi, new to the tin whistle and new to this website. Can anybody tell me or better still can anybody share with me the name and notes to the tune played in the funeral scene of " Waking Ned Devine" One more maybe obviously stupid question. why isn’t the third octave used on the tin whistle? the very small amount of literature i have doesn’t show it being utilized. oh! 1 more. how do you slide from one note/octave to the next smoothly to give that lovely haunting sound? not much interest on these matters down here in Australia. 
WELCOME!
can’t tell you the name of the tune, don’t know it.
concerning your q about the 3rd octave. as far as I know tinwhistles do not go any higher than the first note of the 3rd octave, to go higher is not within the physical range of this instrument.
and it would hurt the ears quite a bit too if you could. 
Welcome to the board!
I vaguely remember this tune discussed in a past thread. You might try searching the archives.
Bryan
Hey, we need to introduce you to Wombat!
Anyway a couple of the other Ned Devine threads talk about “The Parting Glass” but it is a song that is sung by one of the characters after the funeral. I think the one you’re looking for is “Lux Eterna, My Eternal Friend”.
http://chiffboard.mati.ca/viewtopic.php?t=13890&postdays=0&postorder=asc&start=15
All the music was written by Shaun Davey. No clue where you can get the notation but you can buy the soundtrack and try to sound it out.
http://www.amazon.com/exec/obidos/ASIN/B00000DI1V/ref=ase_rambles/002-4757251-5416025
I may be wrong, but i seem to remember it being “the lonesome boatman”.
Haven’t seen the movie in a while so I may be way off here.
Just out of curiosity, was this film called ‘Waking Ned Devine’ everywhere except the UK? Here it was just called ‘Waking Ned’.
Sliding a note is done by ‘rolling’ your finger off the hole to slide up a note or rolling on to the hole to slide down. On some whistles it also works by lowering your finger slowly onto the hole or raising slowly - that’s not as reliable as rolling though, in my humble experience.