GISKE’s "The Sound of Birdsong" doesn’t so much begin as it seeps into the room, like the pale, perpetual twilight of a Norwegian summer night where sleep feels like a theoretical concept. This is a song for the space between the last page of a book and turning off the light; a four-minute float in that strange, conscious stillness when the world is quiet...

It’s a rare and bewildering thrill to encounter something as organically bizarre and entirely transportive as Koradan’s newest album, "Around the World...Music". The Italian duo Alex Baccari and Marzia Di Cicco are dedicated acoustic alchemists. They build the very tools they play. Through their patented centerpiece, the "Koritas," they have physically fused materials harvested from five different continents into a single resonating chamber. You...