In the same way that Brian Eno drifted from the riotous glam of Taking Tiger Mountain to the lush ambient compositions for which he would become best known, Brooklyn musician Hiro Kone has abandoned the tense post-punk of her former band, the excellent, overlooked Effi Briest, for stranger, moodier and more shapeless work on her just-released cassette, Fallen Angels. At the center of the EP is “Island,” an ambling, eerie composition full of panicked arpeggios and clanging digital wind chimes. It seems to gain both tension and momentum as it progresses. The notes come closer together, the mood grows more ominous, the song more percussive. It’s a slow drift through the bleakest pockets of deep space, where the vacuum breeds a mounting sense of anxiety.