Karlo has been an active musician since 2013, when he started to play under the name of Gumbu in the Slovak rap group Haha Crew. That same year, he released his first single under the Czech publishing house Archetyp 51. In addition to rap, he has been actively involved in production throughout his career. Karlo is open to all musical styles, which is evidenced especially in his song The Stranger Rider. He is also a cofounder of the czech label called Milion+.