These secluded, soundproof and secure studios, rented by the month, are accessible 24 hours a day, 7 days a week for musicians' rehearsal needs. Together with its sister studio in Hayward, Annex offers 25 separate rooms ranging in size from 12 by 12 to 20 by 30 feet. All are double-walled to minimize sound bleed, and all are equipped with motion detectors for security. All have Internet access and isolated electrical wiring to minimize amp buzz, and many are air-conditioned. The staff aims to customize the acoustics for each client's needs.