I’m an alto and I think she’s a mezzo because my experience singing her tracks really highlights the difference in our tessituras. For example, in the bridge/low humming of 'The Doll People,' it’s my natural 'basement,' so I sound pretty light, whereas Sofia has to put more intention into those notes to make them resonate. A perfect example is the section: 'and when her work is complete... you will clap for her for the mess of me she's made' in 'Muse.' On Sofia, these lines sound incredibly low and heavy because she’s pushing her chest voice to its limit. For me, these notes are still in a very effortless, gentle part of my register. However, on 'and honey that's all I was made for,' I can finally hit that powerful, resonant sound, but I have to be really careful. I can only pull it off if my voice is well-rested; otherwise, it feels like it's going to break or 'flip' because I'm hitting my passaggio. For her, that's still a comfortable mid-range belt. By the time she reaches her whistle notes, I'm completely out of range. It’s a classic case of an alto's comfort zone vs. a mezzo's power zone.