The Lexicon PCM 42 is a digital delay unit in Lexicon’s PCM series. No technical specifications are available. Nothing is known about its controls, its sound, its memory, or its use in practice. It declares only its category, its manufacturer, and its model name.
The Universal Audio Lexicon 224 Digital Reverb is a UAD plug-in that models the 1978 hardware unit using its exact algorithms, firmware version 4.4, input transformers, and 12-bit AD/DA gain stepping converters. It exposes all eight reverb programs and every tunable parameter as dedicated fader-style controls. It adds Input/Output gain, Pitch Shift, and a selectable Bug Fix mode. It belongs to the UAD Plug-In series and is categorised as a software algorithmic reverb.
The Lexicon 480L is a rack-mounted digital reverb processor introduced in 1986. It contains 200 internal programs. It supports RAM and ROM cartridges. It is controlled via the LARC remote control unit. It has 2 or 4 XLR analog outputs. Two units can be cascaded for two independent engines. Version 1.01 launched in 1986 and immediately became the new world standard for high-end studio reverb machines. Firmware extended to version 4.01 with a surround kit before being replaced by the 960L.
Lexicon is a company, not an instrument. Its first product was a digital delay system released in 1971. It pioneered commercial digital audio processing hardware for professional and live applications — notably digital reverb starting with the Model 224 in 1978. Its hardware is rack-mounted, hardware-controlled, and designed for integration into analog signal paths. It does not run as software, has no built-in synthesis or recording, and offers no modern digital workflow features.