Mountains is Brendon Anderegg and Koen Holtkamp, two sonic explorers whose long history, shared philosophies, and love of sculpting sound, has resulted in some of the most densely layered and blissful music crafted in recent memory. The duo is known for obscuring the boundaries between acoustic instrumentation and electronics. Their debut Thrill Jockey release Choral was universally critically acclaimed, sold through three LP pressings, and ended up being one of the label’s best selling releases of 2009, a remarkable achievement.