ok, i just wrote a cool riff in drop d, using these root notes: D, E, F, G, A, and A#. i want to know what key its in so i can write an intro and solo to work with it. Thanks in advance.
Assuming the A# is a Bb. It looks like a simple D minor. D minor pentatonic shall serve you well.
The A# could be a Bb, so it could be in F major/D minor.
ok, thanks. that should work.
You could show us the riff, so we can suggest some modes for intro and solo.