Well, I can't hear the melody, but from the chords it seems like you are in A with the G chord being a thrown-in flat seven, giving it a mixolydian sound (mixolydian mode is a scale that goes 1 2 3 4 5 6 b7 1 or Do Re Mi Fa Sol La Flatted-ti Do).


All the Best,
Mike


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You have to practice improvisation. -Art Tatum

Mike Dunbar Music


You've got to know your limitations. I don't know what your limitations are. I found out what mine were when I was twelve. I found out that there weren't too many limitations, if I did it my way. -Johnny Cash

It's only music.
-niteshift

Mike Dunbar Music