Hello fairly new to grasshopper, I am trying to use the firefly plugin with sound capture to move spheres in the z direction. In my definition it only applies it to the first line of spheres any help would be greatly appreciated.

Probably to do with your data structure… Hover your mouse over the inputs for the Move component… Is the data strucrure the same for the spheres and the vectors?
Try the data viewer too.
Upload your model if you want more people to help you