Eriperet Nos de Sonitus Horribilis

I sit in front of the trombones
In orchestra rehearsal.
For any sins I have committed
This is fair reimbursal.
They just don't seem to understand
That it is not their place
To loudly empty out their spit valves 
In the oboe section's space.
We're constantly asked to shift our chairs
To accommodate their slides.
But when I do, in spite of it, 
My chair with slides collides.
You'd think there would be lots of sounds
In such a spacious room.
Yet all I hear, it oddly seems, 
Is OOM pa pa pa OOM.