US
A.k.a. Marc Rustigian
US-american mastering engineer, currently based in Costa Rica. Started his mastering career in 1994. Please do not confuse his "MR" with that of Monarch Record Mfg. Co. Marc Regan Mastering: 2004 – Present Precision Mastering: January 2000 – March 2004 Digital Audio Solutions: 1994 – 1999