Yeah, I think I only changed the first note to A# (making it one of the notes in the chord), so changing the chord to F makes the first note work now, however, the others still don't sound quite right... I'll Have a play and see what I can do...
As for powertab editor, things sound funny, but they do sound *right* if they're in key properly, as in it all sounds funny, but not *wrong*... Guitar Pro sounds vastly better (it uses a 'real' sound engine, blatantly NOT real sounding, but good enough to get ideas in order in my head), however it costs money...
EDIT: OK, a quick use of the 'tonality' tool suggests that this is in a weird key - it suggests C#minor, but then the F needs all it's notes 'adjusting'... This is probably why it's hard to get it sounding right for me... If it sounds good live then it may be fine, it's just hard to see that certain bits can ever sound good, as they just leap out as wrong as far as I can see...
Sadly I lost a lot of patience with this kind of thing after the bassast in my last band appeared to be both tone deaf AND rhythm deficient! Apparently he's got better now, but I now give up very quickly with problems that remind me of him... Lol.