Tts very possible that the song IS a half-step off as much modern rock (not so sure about pop) music is deliberately tuned a half-step down in order to either..

Tts very possible that the song IS a half-step off as much modern rock (not so sure about pop) music is deliberately tuned a half-step down in order to either... 1. help the singer hit "higher notes". 2. sound "heavier" and just that "bit off" that half-step down tuning gives. In conjunction with "drop-D" tuning (pulling the low E-string down a full step in order to give a "deeper", more heavy tonality), this gives much of modern "heavy rock" heavier feel. My first encounter with half-step down tuning was, I believe, Motley Crue's Too Fast For Love album, where I beleive Mick Mars used both tunings in order to use a beer bottle for full chord slides (dropping the low-E allows barre chords, the staple of rock music, to be played using just one finger or, in Mick's case, one beer bottle) and that exceptionally low "drop-C#" (remember, we dropped the low-E down a step and a half to C#) drone growl that gave that album an exceptionally hard feel. [edited]