This is a transcription of the horn parts for The Mighty Mighty 

BossToneS' 'Someday I Suppose' from "Don't Know How To Party".

INTRO

G|------------------------------9---
D|--------------------------------2-
A|-----------2-------4-2-4----4-----
E|-7-4-----5------------------------

Just repeat that until...

G|-1-2---4-6~~--6-6-------
D|-----9------------9-9---
A|------------------------
E|----------------------9-

I couldn't figure this out very well, so here's the notes so you can 

figure out another one: G# A B B C#~~ C# C# B B A.

For the verses, repeat the intro.

For the chorus, repeat the other part.

After the chorus:

G|-----------------------------
D|-------6----2----------------
A|---9-7--------9-11-----4-4-4-
E|-4-----------------7---------

And that's it.