Q: what does it mean when there's a ' after a chord? like i saw Db'' today does it just mean two octaves up
A: if the lines are really big and slanted, it means the whole band stops and waits for something (pizza delivery? etc). if the marks are very tiny and it's hand written, i can only speculate that it actually says like -7 or something but they scribbled it too small. (?) or could be specks / flecks, of debris or other contaminatory substance