Mastering, recording and mixing studios, founded in 1972 by Mack Evans in Nashville, Tennessee (USA) ; purchased by Emerald Sound Studios in 1999. Also credited as : Masterfonic - Masterphonics - Master Phonics- Master Fonics - Mastered Fonics - Masterfonics Inc. - Masterfonics, Inc. - Masterfonics Studio - Masterfonics Mix Room - Masterfonics Studio Six - Masterfonics Mastering - MI-S (on the run-outs).
Do not confuse with Masterfonics Tracking Room, a co-owned but separate facility located at 2 Music Circle East.

Known engineers at Masterfonics :
- Milan Bogdan (April 2005 to February 2007)
- Glenn Meadows (he ran the studio from 1989 to 2010)
- Tommy Dorsey (2)
- Jim Loyd (JL MASTERFONICS and/or JL MI-S on the runouts)
- Benny Quinn (1982-2006)
- Mack Evans 1972-1985 (wmE and MI-S in the runouts)