Sylvia Massy

Sylvia Massy
Birth nameSylvia Lenore Massy
BornFlint, Michigan, U.S.
Occupation(s)Audio engineer, record producer, author
Years active1985–present
Websitewww.sylviamassy.com

Sylvia Lenore Massy is an American record producer, mixer, and engineer. Her first major breakthrough occurred with 1993's Undertow, the full-length triple platinum-selling debut for Los Angeles alternative metal band Tool as well as her work with System of a Down, Johnny Cash, Red Hot Chili Peppers, and Brazilian band South Cry.