This is a blend file of a Geometry Nodes procedural setup. (The blend has detailed explanations.) The main point is to create Curl Noise utilized in Geometry Nodes to form Curves. For fun, it is presented as an audioreactive setup, where an audio input is animating the curl noise values. This is, off course, not necessary, the values can be animated manually or by any other property.

This file is part of a series of quick demonstrations of the capabilities of Geometry Nodes. Every setup to download aims to be straightforward, explained, compact and easy to read. 

The setup utilizes Animation Nodes and Geometry Nodes.

NOTE - The product utilizes the Animation Nodes addon and its extensions for generating the curl noise for the Geometry Nodes to use. If you dont have AN installed, the Animation Nodes tab wont appear ! So install the addon, enable it, then open the Animation Nodes tab to see the node tree (called "An Node setup") ! You need AN plus Extra nodes. The link inside has the two combined in one addon. If you have other AN installed, delete it first ! (It is worth it, for the added functionality :) )