Vancouver composer Hildegard Westerkamp is treated to a complete CD of her works in a new release on the Montréal label empreintes DIGITALes (DIFFUSION i MéDIA). All four pieces derive their raw material from environmental sounds (car horns, construction noise, bird song, foghorns), which are then mixed and electronically manipulated in various fascinating ways. One work feature readings by poet Norbert Ruebsaat.