Pattern created with audio using minim

Hi. I'm very new to Processing, so I would really appreciate your help on my project. I have been working on a sketch where I use audio as an input to generate a random pattern.

So far I have used noise as a variable, and the only output so far is a ellipse/rectangle shape moving in a random path. I was wondering if you guys knew how I for instance could use a more organic and complex shape as an output, like for instance a tree, or if it is possible to trigger different .svg shapes based on the frequency and the height of the notes.

I realize that this probably is a complex question, but I would be grateful for any help!

My code so far looks like this:

2. import ddf.minim.*;
3. Minim minim;
4. AudioInput input;
5. float x;
6. float y;
7. 
   
8. float t = 0;
9. int nbLignes = 400;
10. int i=0;
11.  
12. void setup() {
13.   size(700,700);
14.   background(160);
15.   noStroke();
16.   smooth();
17.   
18.   minim = new Minim (this);
19.   input = minim.getLineIn (Minim.STEREO, 512);
20. }
21.  
22. void draw() {
23.   float dim = input.mix.level () * width;
24. 
    
25.   x += input.mix.level () * 100;
26.   
27.   float n = noise(t);
28.   float h = map(n, 0, 1, 0, 500);
29.   fill(103, 255, 255);
30.   pushMatrix();
31.   translate(i*(height/nbLignes), width/2);
32.   rotate(radians(h));
33.   ellipse(0, 100-h/2, dim, dim);
34.   ellipse(0, 100+h/4, dim, dim);
35.   popMatrix();
36.   t+=0.01;
37.   if (i<width) i++;
38.   else {
39.     i=0;
40.   }
41. }