Anthoney J Hart is a London-based musician who goes by Imaginary Forces. His “CT Room” is a collection of sounds culled from unwitting microphones. There are no divulged secrets, no evidence of ill doings. To the extent that voices are heard, they sound more like Electronic Voice Phenomena than like actual conversation. According to the description that accompanies the piece, the recordings come from forms of communication (video chat rooms, instant messenger services) in which sound was conveyed but text was the primary form of transmission. And thus the verbal component — along with, even more compellingly, the extended near silences — is a mere byproduct of the process. The result is a series of textured static and garbled speech, of curt bits of grey fuzz and thick ropes of drone. Speech is an underutilized component of electronically mediated music and sound art, and here it is successfully sourced for its sonic rather than its literal assets.