Vintage Digital Synthesizer 1977. Hal Alles shared this really excellent demo of the Bell Labs Digital Synthesizer!

This is from the Yahoo Synergy-Synth Group:

Since a few people have expressed interest, I posted a video on youtube of a demo using the synthesizer I developed at Bell Labs.

This demo was made as a backup for a live demo for the celebration of the 50th Anniversary of Talking Motion Pictures. Hence the references to the movie industry. The live demo was done on the stage at the Palladium in Hollywood in 1977, so the backup was never shown. It started life as studio video tape made a few days before the show, converted to 16 mm film, then later to VHS tape, then to DVD, and finally the digital version posted. Very few people have seen this – I did not have a copy until 1995.

Here is another video of Laurie Spiegel playing the "Alles Synth".

Find out more about the Bell Labs Digital Synthesizer here:

https://en.wikipedia.org/wiki/Bell_Labs_Digital_Synthesizer

Yahoo Synergy-Synth Group:

https://groups.yahoo.com/neo/groups/synergy-synth/info

DK Synergy Website:

http://users.ece.gatech.edu/lanterma/synergy/