Bob Katz is an American audio mastering engineer and author of a popular book on audio mastering. Katz has mastered three Grammy Award-winning albums and one nominated album. He has received acclaim from audiophiles[not in citation given] and his book on mastering has received acclaim, with some considering it the "definitive work on mastering". He has developed proprietary systems K-Stereo and K-Surround. These processes are designed to "recover lost or amplify hidden ambience, space and imaging, and generate stereo from mono signals without adding artificial reverberation."
Katz taught at the Institute of Audio Research from 1978 to 1979. In 1988, Katz joined Chesky Records and began recording jazz and classical artists there, as well as producing oversampled commercial recordings. In 1990, he founded an audio mastering company called Digital Domain Mastering, where he continues to work. In early 2015, Katz began a regular blog, Katz's Corner, on the headphone enthusiast site InnerFidelity. 
Grammy Award-winning albums
Grammy Award-winning albums mastered by Bob Katz:
- 1985: Ben Kingsley, The Words of Gandhi
- 1997: Paquito D'Rivera, Portraits of Cuba
- 2001: Olga Tañon, Olga Viva, Viva Olga
- Bob Katz (2007). Mastering Audio: The Art and the Science. ISBN 0240808371.
- Stereophile: 1992 Records To Die For
- Elsevier Archived August 16, 2009, at the Wayback Machine.
- "Bob Katz Mastering Audio". Sound On Sound. Retrieved 14 December 2012.
- "Mastering Engineer Bob Katz Awarded U.S. Patent". Mix (magazine). 2006-10-24. Archived from the original on 2007-09-30. Retrieved 2013-04-18.
- "Katz's Corner". InnerFidelity. Retrieved 15 April 2015.