I have a friend who is in what i guess would be called a death metal band, and i told him i would help him write some stuff since he is kinda new at theory. But i have a song that i am not sure what key it is in, it starts with an add nine barre chord, but because of the tuning i am not sure, the intro goes as follows,
tuned own 1 whole step then drop D<===Thats low
D|-------------------------|
A|-------------------------|
F|-----7-----7-----5-----5-|
C|---3-----3-----1-----1---|
G|-5-----5-----3-----3-----|
C|-------------------------|
Would it be in the Key of F??? Thanks for any help.