Choolwe Siamubotu (born March 17, 1996) professionally known as Dmstry (The Mystery, Da' Mystery), is a Zambian EDM Artist/Producer, Audio Engineer, SFX Technician, Songwriter and Remixer. Embarking on a music career in 2010 under alias Gravity 9inety 6ix.He launched the Dmstry project in 2018 In 2019 He worked on the Southern African Development Community (SADC) Public Outreach song competition winner ‘SADC – Throw Your Hands Up’ by Zambian Hip-Hop pioneer CHISENGA, formerly known as Crisis AKA Mr Swagger. In the same year he remixed "Yours Forever" by another Zambian Hip-Hop pioneer Holstar. In 2020 he got a Warner Music South Africa placement for his "Super Bowl" remix by South African MTV EMA award winning twin duo Locnville featuring South African rapper Gigi Lamayne . In 2021 his song 'Resume' was used in the Netflix Video on Demand app in Belgium. He also produced 'Feel The Riddim' remix by Ugandan international award winning Disc Jockey DJ Victor256 featuring Ugandan rapper Profet, the song was among the biggest dancehall riddims in Uganda that year and crossed over to Burundi and Kenya. TBA, a joint project with Zambian international award winning artist Paul Payne837 was also released. In 2022 Dmstry was among the sound engineers who worked on the UNICEF sponsored learning by radio program as well as working on European Union Sponsored TV show 'Munda Make Over" as a recording engineer and SFX technician.