Vocal Type: Light-Lyric Soprano
Vocal Range: 3 octaves( BB2-Bb6)
Whistle Register: No
Vocal Pluses: Chameleon-like voice that skirts styles and genres depending on what is required. Sia can deliver a vocal that is "commercial" and mainstream, with her vocal mannerisms toned down- something most prominently heard on her demos. However, her natural style is one that is characterful, emotive and steeped in jazzy inflections unique to her. This individuality is further bolstered by the singer's, at times, slack annunciation and quick vibrato.
With an ability to manipulate the texture of her voice, the Diva produces interesting and varied harmonies. Being able to smooth out the texture of the voice, she can layer the vocals to produce a sound that is unobtrusive, light and contemporary [The Bully]. However, if the texture and timbre is played with, Sia can create harmonies that are sonically dramatic [ Lea Michelle's Battlefield].
The Diva's mid-range is comfortable, easy and connects without issue to the darker (limited) lower-range [Breath Me], but she is capable of lightening the timbre, making it breathier and softer [Sunday]. The upper-part of her mid-range can be sweet and feminine, with a warmth that contrasts the lower range [The Bully]. However, she often solidifies the tone, giving it a cutting, nasal ring that matches closer to her preferred style of belting. [The Girl You Lost To Cocaine (Live)].
Sia's chest voice (her "belt") can be throaty and full, with a "pulled" quality that imparts a rawness to the vocal [ Chandelier]. This is the style in which she has become accustomed to belting with, and is in keeping with the organic and earthy style of the Diva's overall singing style. It is also possible for the Diva to sing complex melisma while belting this way, despite the cumbersome weight [Climax of Kill And Run]. However the Diva has a deft understanding of her voice, so can alter her mix, and change her placement, to create numerous variations of timbre and tone not just in her belt, but throughout the range. (Often the more nasal the placement, the clearer the quality of the note produced [The Fight ] ).
Vocal Negatives: The chest voice, when placed in the throat, could cause problems for the Diva if overused. She also refrains from using her head-voice, despite being capable [Hear: Chandelier].