Taki decides that the band will choose the euphonium soli player by voting on one final audition. Kumiko then decides that they should choose based on sound alone, and so the two of them audition anonymously.
I've already decided I'm 
playing the soli with you.
‫قررت بالفعل أني سأعزف السولي معك.
Ich hab schließlich beschlossen, …
Perché ho già deciso
Já decidi que vou tocar o solo com você.