Denver’s own RUMTUM aka electronic producer, John Hastings, released his first single of the year, “Ruby Dime,” on STS9’s 1320 Records. The island-tinged breakbeats and sleek production make the track both playful and sophisticated, leaving us eagerly anticipating the Holy Underground artist’s forthcoming releases. “Ruby Dime”  is the first in a run of free singles Hastings will release this year on the same 1320 Records imprint, all of which will include original artwork by the artist himself.