private int[] get_most_relevant() {
		ArrayList<Integer> holder = new ArrayList<Integer>();
		int min = (notes.size() < 4 ? notes.size() : 4);
		int counter = 0;
		sort_notes();
		while (holder.size() < min) {
			if(notes.size() == counter) break;
			int note = notes.get(counter) % 12;
			if (!holder.contains(note)) holder.add(note);
			counter++;
		}
		int[]chord = new int[holder.size()];
		for (int i = 0; i < holder.size(); i++) chord[i] = holder.get(i);
		return chord;
	}