Clockwise from bottom left, with equipment in racks listed from top to bottom:

• Telephone.
• Analyzing keyboard (outputs to computers).
• Synthi AKS. Tannoy loudspeaker (behind).
• KSR-33 Teletype.
• Rack 1. Filter controls; audio-frequency oscilloscope; DEC tape drives; DEC PDP8/L (“Leo”).
• Rack 2. High-frequency oscilloscope; filter controls; potentiometer bank; frequency counter; Wavetek oscillator; 32K hard disk drive.
• Rack 3. Amplifier controls; DEC PDP8/S (“Sofka”); various audio devices; main patch panel.
• Rack 4. Digital-analog controllers, including the “button panel” for interaction with MUSYS programs; reverberation units.
• Monitor and keyboard for programming computers. Tannoy loudspeaker (behind).
• Synthi 100.
• An Ampex 4-track tape deck with Dolby noise-reduction units on top.
• Another Ampex 4-track tape deck without Dolby.
• The main mixer, built by Robin Wood, who aquired control of the rights to EMS equipment in 1995.
• Custom unit for 4-track spatial effects.
• (Centre.) Valuable Persian carpet.

via the Synthtopia Flickr Group