In music, refers to the alto vocal range or an alto part/instrument.
from Italian
She sings alto in the choir.
She sings alto in the choir.
The alto part of this piece is very beautiful.
アルト is the lowest female voice range, below メゾソプラノ, and the two are easily confused when learning voice classifications.
Borrowed from Italian 'alto', meaning high, but used in music to refer to the lower female voice range.