Audio Recording Center Directory - Directory with information on digital and analog recording for home or studio, music software, demo tapes. - http://www.audio-recording-center.com/
AudioEngineer.com - Contains profiles of audio engineers, producers and recording studios. - http://www.audioengineer.com/
World Studio Group - Global affiliation of premier recording studios organized through a marketing and booking agency. Includes pages of studios worldwide. - http://www.worldstudio.com/
StudioMenu.com - Directory of recording businesses who pay for listings. - http://www.studiomenu.com/