Pacific Microsonics

US manufacturer of consumer audio equipment and integrated circuits, founded in 1996 by Michael Pflaumer, and based in Union City, California. On September 18, 2000, Pacific Microsonics Inc. was acquired by Microsoft Corporation.

The company has developed High Definition Compatible Digital (HDCD) recording and mastering process, which eliminates the distortion and loss of detail and dynamics found in digital recordings. The audio technology licensing company distributes HDCD encoding products to the professional audio market.