#1
I am working on a song and I am trying to write a solo. I can't seem to good it though. I can't figure out what key the song is in either. the chords for the verse are (power chords) D flat, G flat, G. and the chorus chords are (Power chords again) E minor, B, C, G. What is the key and how do I write a solo for it!!
#2
It depends on alot of other factors, tempo, general feel etc. Id say listen to bands similar to the sound your trying to achive and find out what scales they use.
#3
Check out the key signature, also, write out the notes of the chords and figure out scale would best match those notes, if theres a few notes that don't fit that scale will still work