How to make audio waves like these shapes

Stefan,

As I (mis)understand what you wish to achieve, you can (Smart Guides being your friends):

1) Create a basic horizontal line where the upward and downward wave parts meet, and create an upper and a lower (curved) general bounding path corresponding to the general course of the amplitude, then lock all three;

2) With the Polygon Tool create a triangle and rotate it so that it has a vertical side to the left, then change its height to the desired width of the wave parts, the witdh can be chosen freely;

3) Turn the triangle from 2) into an Art Brush with a fill of the desired colour and no stroke for giving the right shape/appearance to each wave part;

4) Create the first vertical path with a 1pt stroke and no fill for the first upward wave part, starting as desired at the basic line and ending above the highest amplitude to be made, then apply the Art Brush from 3); this is the temporary first upward wave part;

5) Create copies of the temporary first upward wave part to the right with a distance equalling the amplitude width; now you have all the temporary upward wave parts (you can use Effect to move the desired number of copies and expand);

6) Repeat 4) and 5) for the temporary downward wave parts, only mirrored and placed half an amplitude width to the right;

Now you have all the temporary downward wave parts at a constant amplitude higher than the highest amplitude(s) to be made, and crossing the upper/lower general bounding paths;

7) Click each temporary wave path with the Scissors Tool where it crosses the corresponding general bounding path, or where you wish to end the wave part for special wave parts, and delete the outlying unwanted part;

😎 Hide the basic horisontal line and the general bounding paths from 1).

Now you have all the wave parts in the desired triangular shapes and colour;

I believe it may be possible to use scripting/actions.