Sahko has decided to offer up a series of releases focusing on choice unreleased works from the late, great Mika Vainio's archives. The first, "Arc 1", showcases a 32-minute piece (here split into two parts to fit on one record) originally recorded in 1994 for his Ambient City radio project at Helsinki's Museum of Contemporary Art. It's a sparse, stripped back affair, with Vainio alternating between drowsy, elongated ambient chords, crackling drones, fuzzy white noise, doom-laden tones, creepy sonic movements and hushed moments of intense electronic bliss. It's not Vainio's most blissful work, but it is hugely enjoyable; an experimental ambient journey that's arguably darker and more unsettling than many of his records as O.