Animation Nodes

Hi all,

I’ve got a (simple) question I hope someone can help me with. I have a sound waveform projected on a spline. However, I would like to only have points 2 till 7 to be effected by the fall-off. But I have no idea how to extract only these points from the spline info node. Please have a look at the image below. Any help is welcome! Thx.