Delta Sleep emerged from a band called Sávlön, featuring bass player Maria Sullivan and drummer Adam Brodigan beside Yüceil and Hodgson.

[1] Shortly after the release of Management, Sullivan and Brodigan left the band to start a family and focus on other musical projects, respectively.

[7] During touring for Ghost City, Delta Sleep released their EP Younger Years as a surprise in September 2019.

[8] Following cancelled tour dates due to the COVID-19 pandemic, Delta Sleep gradually released their compilation album Soft Sounds between May and July 2020.

Soft Sounds consists of 9 stripped-down and acoustic live performances that were recorded during touring in France, Japan, the United States and Turkey as well as a new song "A Casa",[9] which was later featured on their 2024 album Blue Garden.