hi!
i'm a beginner too(i started in december
but i have work a little bit , and tonight there is nothing to do except to help you on this sketch
i work with sound too and that's why i have ever use the promidi library.
So, i have try to do something (i think it's working )

i don't have write nothing for the comment (excuse for my bad english) but i have use some Object and Array of objects.it's more easy to use.

////this is the first page

import promidi.*;

MidiOut midiOut;
MidiIO midiIO;
int numEllipse=8;
int cc,giveInc;
int [] c = new int[numEllipse];
int [] x ={
 320,461,520,461,320,179,120,179};
int [] y={
 120,179,320,461,520,461,320,179};
int [] diam={
 64,64,64,64,64,64,64,64};  
int [] noteNum={
 60,61,62,63,64,65,66,67};
int [] contNum={
 70,71,72,73,74,75,75,76};
int [] value = new int[numEllipse];
Note [] sound = new Note[numEllipse];
Controller [] increment=new Controller[numEllipse];
SoundCircle[] circle=new SoundCircle[numEllipse];

void setup(){
 size(640, 640);
 smooth();  
 background(255);
 noStroke();
 //le MIDI
 midiIO = MidiIO.getInstance(this);
 println("<<<<<<<<<< Ports Midi >>>>>>>>>>");
 midiIO.printDevices();
 midiOut = midiIO.getMidiOut(0,3);
 for(int i=0;i<numEllipse;i++){
   sound[i]=new Note(noteNum[i],127,50);
   increment[i]=new Controller(contNum[i],value[i]);
   circle[i]=new SoundCircle(x[i],y[i],diam[i],increment[i],c[i]);

 }


}

void draw() {
 background(255);

 for(int i=0;i<numEllipse;i++){
   //circle[i].update();
   circle[i].display();
   value[i]=circle[i].giveInc;
   if(mouseX!=pmouseX){
   midiOut.sendController(circle[i].increment);
   }
   print(circle[0].giveInc+"     "+circle[4].giveInc+"    ");
 }
}
////this is the second page

class SoundCircle{
 int x,y,diam,c,giveInc;
 Controller increment;





 SoundCircle(int ix,int iy,int idiam,Controller iincrement,int ic){
   x=ix;
   y=iy;
   diam=idiam;
   increment=iincrement;
   c=ic;

 }
 
 void display(){
   c=int(dist(mouseX,mouseY,x,y));
   cc=constrain(c,0,600);
   fill(c);
   giveInc = int(map(cc,0,600,0,127));
   ellipse(x,y,diam,diam);

 }
}

voilà !!

have a nice trip
say me if it's working
ciao