hi!
It seems to me, when the sonia library is being used
(import pitaru.sonia_v2_9.*;)
the background() command is being either ignored or at least somehow overriddden or so. I simply get a grey background. If I comment out the line with 'import ...' it works just fine.
Now I do definitely need a white background color for my project, so I ask for some help here. I can't be the first one to come across the problem, still I couldnt find any useful information on the web so far.

Well i don't know if it is just about sonya or more general, here is my code, I guess it always helps to post it as well:

import pitaru.sonia_v2_9.*;
int w = 800; // stage width
int h = 600; // stage height
int line_count = 0; // counts total amount of lines
int c = 0; // counter, used for speed control
//
float x1;
float y1;
float x2 = random(w);
float y2 = random(h);
//
void setup() {
 size(w, h);
 framerate(500);
 Sonia.start(this);
 LiveInput.start();
 background(255);
}
int line_length = 10;
int line_density = 1; //how many lines are drawn each interval
//#################################################################
// lim is gonna be a value in a certain range (between loThresh and hiThresh)
// the higher the volume, the lower is lim
// if the counter c is higher then lim, lines will be drawn, and c reset to 0
//#################################################################
int loThresh = 0;
int hiThresh = 100;
int sensitivity = 500; // sensitivityplies the (very low) values given by getLevel()

void draw() {

 c++;
 float lim = LiveInput.getLevel()*sensitivity; // getLevel gives low values, so sensitivityply bu thresh value
 lim = (lim>hiThresh) ? hiThresh : lim; // limit to thresh value (if higher)
 lim = hiThresh-lim; // get inverted value
 lim = (lim<loThresh) ? loThresh : lim; // limit to zero (if lower)
 println(lim);
 if(c>lim){
   c=0;
   for (int i=0; i<line_density; i++) {
     line_count ++;
     // println(line_count);
     //
     float l = line_length;
     x1 = x2;
     y1 = y2;
     x2 = x1+(random(l)-l/2);
     y2 = y1+(random(l)-l/2);
     x2 = (x2>w) ? w-random(l) : (x2<0) ? random(l) : x2;
     y2 = (y2>h) ? h-random(l) : (y2<0) ? random(l) : y2;
     //smooth();
     stroke(0, 100);
     line(x1, y1, x2, y2);
   }
 }
}

Thanks,
jovi