"Trumpet... it's a brass band. Brass-O! Did you get it? Like Hawaii Five-O, but with brass-like the polish.
We play that, Hawaii Five-O."
I will try to unravel this for you, frindle.
Firstly, Brasso is a famous old brand of polish used to clean brass objects.
Hawaii Five-O refers to the theme tune to the TV program of the same name.
She is saying that she plays the trumpet in a brass band called Brass-O! – the name of the band is a pun using both the title of the TV program and the name of the polish.
"Brass-O! Like Hawaii Five-O, but with brass – like the polish".
not a teacher