I;m new to processing and would like to use serial data from 2 sensors to play 2 sound files, one per sensor data set.

the code i have is (based on code found here and in Virtual Color Mixer) is as follows (currently only solving for one sensor to work out the bugs)

I am getting the error "it looks like you are mixing active and static modes"  Can you give me some advice on where i have confused the modes?  will this code let me me add another sensor ?

Thanks for any light you can shed on this.

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//part of this code comes from https://forum.processing.org/topic/nullpointerexception-error
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import ddf.minim.*;
import ddf.minim.signals.*;
import processing.serial.*;     // import the Processing serial library

AudioPlayer player;
Minim minim;

Serial myPort;                  // The serial port

float sensor1Value = 0;        // drum value
//float sensor2Value = 0;      // piano value
//float sensor3Value = 0;       // flute value
 
float bgcolor; // Background color
float fgcolor; // Fill color
float xpos, ypos;        // Starting position of the ball



void setup() {
  size(640,480);
 minim = new Minim(this);
 
  // load sound file, give the AudioPlayer buffer of 2048
  player = minim.loadFile("drum4.mp3", 2048);
 
 
 // List all the available serial ports
 println(Serial.list());
 
 // Open com port of 0 (
 myPort = new Serial(this, Serial.list()[0], 9600);
 // don't generate a serialEvent() unless you get a newline character:
 myPort.bufferUntil('\n');
   }
 
 void draw() {
 // set the background color with the color values:
 background(bgcolor);
 fill(fgcolor);
 smooth();
 ellipse(xpos, ypos, 20, 20);//draw the shape
 }


 // serialEvent  method is run automatically by the Processing applet

 void serialEvent(Serial myPort){
 // read the serial buffer and get the ASCII string:
 String myString = myPort.readStringUntil('\n');
 //if  bytes other than the linefeed
  myString = trim(myString);
 
// split the string at the commas
// and convert the sections into integers:
int sensors[] = int(split(myString,','));
}
int value=sensors[0];

println("value =" + value);
if (sensor1Value==255&&player != null){player.play();
//if(value==0){player.close();} 

// add a linefeed after all the sensor values are printed:
    println();

if (sensors.length > 1){
      xpos = map(sensors[0], 20,180,0,width);
      ypos = map(sensors[1], 20,180,0,height);
      fgcolor = sensors[2];
}
    // send a byte to ask for more data:
    myPort.write("A");
}
}
  void stop()
{
  // always close Minim audio classes when you are done with them
  player.close();
  minim.stop();
 
  super.stop();
}