[7] Wald-Harding was initially a violinist, which she played from the age of eleven after being gifted an 1804 Joseph Strauss by a violin teacher,[6] but switched to alto saxophone after hearing her sister,[7] Milly,[4] play with a jazz ensemble, and after her mother received a shipment of instruments to sell, including an alto saxophone which she found she could not shift.
[7] In January 2020, she left her violin on a rack above her seat on a Manchester Victoria train; after her mother's Twitter appeal to find it went viral,[6] she found it at the station's lost property office.
[5] When she was thirteen, The Press noted that she and her sister Milly were members of Yorkshire Young Sinfonia, a Yorkshire-based youth orchestra.
[13] On 22 October 2021, she featured on Pastel's "Papaya",[14] from the compilation album College Music Presents: Back on Track, released the same day.
[15] On 30 September 2022, she released a cover version of Norah Jones' "Don't Know Why",[16] which appeared on the compilation album Blue Note Re:imagined II; as part of a review for said album, KNKX noted that she "stays mostly faithful to Jones' original coffee shop vibe but adds her generational perspective with a more introverted vocal reading and sharp, concise saxophone solos", and likened it to "a coffee shop with free wi-fi, charging stations and great music".