Alvin Lucier is best known for his pioneering work in the mid-sixties in the exploration of sonic environments, particularly sounds that we would never perceive under ordinary circumstances. Vespers and Other Early Works restores to the catalog several of his key works from that time. In Vespers (1969) performers with Sondols (sonar-dolphin), hand-held pulse wave oscillators, explore the acoustic characteristics of given indoor or outdoor spaces by monitoring the echoes of the pulse waves off the walls, floors and ceilings, as well as any objects or obstacles in range of the sound waves. Over time, the listener receives an acoustic signature of the room. In Chambers (1968), battery-operated radios, tape recorders, and electronically powered toys of various kinds are hidden in paper bags, shoes, kettles, and small suitcases and other small resonant environments. As performers carry these small “rooms” into larger ones, such as concert halls, football stadiums and underground cisterns, the sounds, already altered by the acoustics of the small environments, are altered a second time by the acoustics of the larger ones. This version was recorded in 2002.