Sonquencer/Processing/Sampler/SetBeat.pde

int ereaseRow = 0;
boolean doErease = false;
boolean doRec = false;
boolean chooseBank = false;

void setBeat(int index, int sample) {
   samples[sample][index] = true;
}

void keyPressed() {
  println(keyCode);
  if(keyCode >= 64 && keyCode <= 88) {  // From A to Z
    println(key);
    //ereaseRow = keyCode-48;

    if(key == 'b') {
      chooseBank = true;
      controller[0] = "STOP";
      controller[2] = "CHOOSE...";
    }
    if(key == 'p') {
      controller[0] = controller[0] == "PLAY" ? "STOP" : "PLAY";
      beat=0;
    }
    if(key == 'r') {
      controller[1] = controller[1] == "UNSET" ? "REC/OVERDUB" : "UNSET";
      doRec = true;
    }
    if(key == 'x') {
      controller[1] = "EREASE";
    }
  } else if(keyCode >= 48 && keyCode < 57) { // From 1 to 9
    int code = keyCode-49;
    ereaseRow = controller[1] == "EREASE" ? keyCode-48 : 0;
    doErease = ereaseRow>0;
    
    if(code >= 0 && code < numSounds && !doErease) {
      if(chooseBank) {
        controller[2] = "BANK" + (code+1);
        loadData();
        chooseBank = false;
      } else if(controller[1] != "EREASE" && controller[1] != "UNSET") {
        setBeat(beat, code);
      }
    }
  }
}