The idea
Do not make the engineer walk around the building to find out what the system is doing.
A 1992 Studio Sound product report described AGM’s Digital Audio Processing Platform as expandable to sixteen channels and integrated with AGM Surround Sound systems. More unusually, it described “The AGM Network” as providing full remote control of installations fitted with AGM proprietary control cards and real-time system diagnosis.
That makes AGMnet more than a control panel with a long cable. The documented intention was supervisory: operate equipment remotely, see whether it was behaving correctly and diagnose a complex installation as a system.
A separate development from SAnet
The distinction is historically important. Stage Accompany’s SAnet was used with the AGM Ambisonic system at Cairo’s. AGMnet was AGM’s own later remote-control and diagnostic system. The two should not be conflated.
C-Audio controller card
Anthony Morris’s first-hand project record states that Cambridge amplifier manufacturer C-Audio commissioned the first controller card that connected its amplifiers directly to AGMnet, and that the capability was demonstrated at professional-audio exhibitions. C-Audio’s existence and later sale to Harman are independently documented; the specific AGM commission remains founder-record provenance pending recovery of the original agreement or exhibition material.