Chicago Mastering Service

Chicago Mastering Service is a full-service analog and digital audio mastering studio. An etched series of numbers identifies the date the master lacquer was cut in the format of YYMMDD Do not add date as a catalog # to LCCN. e.g. 080929 - Sep 29, 08 (usually found behind a "lying Y" in a circle (Ⓨ, rotated 90° to the left), as in their logo, and the engineer's initials). Use [CMS logo] when adding this to the BaOI. Mastering engineers known to have been employed at Chicago Mastering Service: Jason Ward [JW] Robert Weston [BW] Shelly Steffens [SS] Matthew Barnhart [MB] Margaret Luthar [ML] Greg Obis