This is the xylophone part, she plays at the very beginning and several times throughout
the song. The bassnotes first come in at the middle of the song and are played by a
different instrument (hmm...probably a bass?).
[ Tab from: https://www.guitartabs.cc/tabs/p/princess_chelsea/frack_tab.html ]
-0--0--0---------0--0--0---------0--0--0--------40--0--0-----------|
---------4--4------------4--4------------4--4--4---------4--4------|
--1---1-----------1---1-----------1---1-------4---1---1------------|
----------6---------------6---------------6---------------6--------|
-------------------------------------------------------------------|
-0-0-0-0-4-4-4-4-0-0-0-0-4-4-4-4-0-0-0-0-4-4-4-4-0-0-0-0-4-4-4-4---|
The next part is the melody of the synthies that come in at 3:32:
------0-------------------------------0----------------------------|
-0-0-0---4-------0---------------0-0-0---4-------0-----------------|
--1-1-------------1-1-1-----------1-1-------------1-1-1------------|
-------------------2-2---6-------------------------2-2---6---------|
-------------------------------------------------------------------|
-------------------------------------------------------------------|
Happy playing :)