public String changeNew(char change, char changeTo) {
        String out = start;
        boolean delete = (changeTo == 't');
        for (String s : pieces) {
            StringBuilder st = new StringBuilder();
            try {
                NoteLine n = new NoteLine(s);
                ArrayList<String> notes = n.notes();
                for (int i = 0; i < notes.size(); i++) {
                    String str = notes.get(i);
                    if (str.length() > 0) {
                        if (delete && str.charAt(0) == change)
                            notes.set(i, "");
                        else if (str.charAt(0) == change)
                            notes.set(i, "" + changeTo + str.substring(1));
                    }
                }
                st.append(n.toString());
                out += st.toString();
            } catch (ParseException e) {
                st.append(":");
                error = true;
            }
        }
        out += end;
        return out;
    }