The Manhattan Transfer Follow

Tubby misbehaves at rehearsal, and the conductor tells him to
leave. Defiant, Tubby joins a marching band. It's fun at first,
but all the marching finally wears him out. He can't even
OOM-PAH anymore, and he longs to get back to the orchestra.
Tubby escapes and runs home once again where he finds that all
his friends missed him, too! Tubby realizes he belongs in the
orchestra, and it makes him very happy.

[Tubby (Tim Hauser):]
I want to be seen,
I want to be heard;
My dream has always been
To sing like a bird.
Why can't I be
Content to just be me?
Why can't I be
Just the best that I can be?
I don't like to see me
Feeling so unhappy;
I would much rather see me
Very, very happy.

[Tubby (Tim Hauser):]
Oh, the duty of a tuba
When the others sing, "Tra-la,"
Is to sound just like a tuba
And say, "OOM-PAH."
But when you've got to march all day,
Not only march, but also play,
You start to lose your breath and huff,
And instead of "OOM-PAH,"
All you say is "Puff,puff, puff."
I'm a very sad tuba
'Cause I've lost my OOM-PAH
Nothing's left for me to do now
But go, "Puff...puff...puff..."