Arca's new album KiCk i, which is due out Friday, is full of anticipated collaborations, and here's one of them, "KLK," featuring Rosalia, and co-produced by Arca's friend since adolescence, Cardopusher. "I always think of the furruco when I program sub bass," Arca writes. "The furruco is an autoctonous musical instrument that is played via friction of a rod attached to a large drum head. when rubbed it produces a big sub bass pulse that marks the tempo for the whole gaita groupm, gaita is typical venezuelan music. I played furruco for years it in the gaita groups of my school and a music academy i went to and it influenced me a lot, as well as learning cuatro. Venezuelan music has always been with me, and I'm so grateful to have studied some of its musical stylings."