Timeline. October 3, 1938: British telephone engineer Alec Harley Reeves files at the French Patent Office the first patent describing the technique known today as pulse-code modulation (PCM). On November 22, 1939, Reeves files also in the US. It was first proposed as a telephony technology.; 1943: Bell Telephone Laboratories develops the first PCM-based digital scrambled …

The Nord Stage is a digital keyboard or stage piano, manufactured by Clavia Digital Music Instruments of Stockholm, Sweden. There have been five editions of the instrument: the original Nord Stage in 2005, the Nord Stage EX in 2008, the Nord Stage 2 in 2011, the Nord Stage 2 EX in 2015, and the Nord Stage 3 in 2017. ... The Stage Synthesizer ...