Neve digital sound desk, ex-BBC DSP-1, 1985, the complete system, including several racks of processing equipment
The Neve DSP made in England in 1981.
The Neve DSP was the first fully-digital sound desk. The analogue audio was digitised in the stagebox and sent as serial digital data down a fibre optic cable to the processing racks. All the Digital Signal Processing (hence DSP) - such as mixing, equalisation, dynamics etc, was carried out in the digital domain, the final signal from the desk appearing in digital form (AES/EBU) for recording, or converted back to analogue for broadcasting. This desk was fitted in an outside broadcast vehicle by the BBC and as a result of vibration during transit proved to be unreliable in operation. Probably the most complex and expensive sound desk ever made.