A low-sounding female voice sung in treble clef is typically referred to as a "mezzo-soprano." Mezzo-sopranos possess a vocal range that lies between the soprano and contralto voices, allowing them to sing lower notes while still operating in the treble clef. They often have a rich, warm sound and are frequently cast in various operatic and choral roles.
The treble; the highest vocal register; the highest kind of female or boy's voice; the upper part in harmony for mixed voices., A singer, commonly a woman, with a treble voice.
Bass Basso Profundo
A treble is the highest of the four main male voice types, usually found in cathedral choirs, and is sung by boys. The soprano is the highest of the three main female voice types, higher than mezzo-soprano and alto.
This female singer sang similar songs like Carol King...
The highest female singing voice is called a coloratura soprano.
Baritone is a male singing voice. It is of a classical style, and originates from the word barytonos, meaning deep (or heavy) sounding. It is between bass and tenor.
The lowest female voice is called contralto.
Contraltos or Altos are a lower sounding female voice in choral music. This is the range between Mezzo-Sopranos and Tenors (ususally men). They have a darker haunting sounded voice compared to the Coloratura (high) Soprano voice.
The staff used for higher pitches is called a soprano clef or treble clef. It is often used for instruments with higher ranges such as the violin, flute, and voice.
Soprano
Melody.
The phrase "and his big manly voice turning again towards childish treble" suggests a shift in tone or demeanor, where a typically deep and authoritative voice transitions to a higher, more innocent-sounding pitch. This change can imply vulnerability, nostalgia, or a return to a more youthful state, highlighting the contrast between maturity and childlike qualities. It evokes a sense of playfulness or emotional depth, indicating that the character may be grappling with conflicting aspects of their identity.