Composer/pianist Nomi Epstein’s music, as demonstrated on the portrait recording sounds, is made up of fine-grained distinctions between sounds and between sound and non-sound. This is evident particularly in the three compositions for solo piano: Till (2003), Solo for Piano (2007-19), and Layers for Piano (2015/18), all of them performed by Reinier van Houdt. Till, which opens the album, surrounds deliberately picked out, largely quiet individual notes and chords with silences to create differential effects of dynamics and register. The first part of the two-part Solo for Piano, appropriately titled Waves, features oscillating, closely-spaced tones that particularly in the lower registers merge into something like a massed, grey noise. The second part opposes Waves’ sonic blur with unhurried, precisely defined pitch groups. Layers for Piano, a three-part work, places delicate sonic fragments consisting of single notes and muffled dissonances within a range of quiet, subtly distinguishable dynamics. The other two compositions in the collection are for trios: of voice, bass flute and electronics, and for flute, bass clarinet, and piano. The first of these, for Collect/Project (2016-19), is a low-key drama of contrasts between the hollow tones of the bass flute (Shanna Gutierrez) and the abrasively dense interventions of the electronics (Francisco Castillo Trigueros). When Frauke Aulbert’s voice breaks through into a sonic clearing, the effect is bracing and revelatory. The 2016 sounds for Jeff and Eliza, for flutist Eliza Bangert and bass clarinetist Jeff Kimmel, who perform it here along with the composer on piano, builds harmonies from the wind instruments’ multiphonics superimposed on isolated notes and chords from the piano. The piece’s very slow harmonic rhythm lends it a sense of timelessness.