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.