ADJ.
excellent
VERB + FALSETTO
switches
PREP.
into
ADV.
suddenly
noun
The "false" (singing) voice in any human, usually airy and lacking a purity of vowels; created by using the next highest vocal folds above those used for speech and normal range singing. It is commonly confused with the head voice register.
A person who sings in falsetto.
verb
To sing or utter in falsetto.
He has an excellent falsetto range.
The singer suddenly switches into falsetto.