class Score{

//Score() {}
Etude e = new Etude(this);

void setup(){


e.createPart("piano");
e.createPart("guitar", e.GUITAR);
e.createPart("drum", e.HI_HAT, 9);
}

void draw(){}
}


*Compile Error*

do you have a setup() and draw() method in the main tab? that looks like
you might just be confusing the compiler.