Five pieces by this Atlanta-based composer: two for solo saxophone (baritone and soprano) and three for saxophone quartet, performed here by the New Thread Quartet. Koh’s music typically explores the intricacies and details of sound, and these pieces can be characterized that way; they tend to be on the quieter side with plenty of space and silence. Track 1 is probably my favorite, with the baritone sax sometimes approaching what might be called drones and spending much of its time in the higher registers. Interesting, varied, well-played compositions that are definitely worth a listen or two or three.