I do love a good stringer. Ive worked on a Yamaha SK20 and a Roland RS-09 and RS-101 . This time it’s a Korg Delta DL-50 Strings Synthesizer, a lovely machine from 1979. It came out as part of Korg’s series of three Greek letter-named polyphonic machines. There was the Sigma and Lambda, both of which were largely preset machines, and then the Delta, which arguably offered the most control (until the Trident came out in 1980 and blew it out of the water). The Delta is fully polyphonic, no mean feat then or now. Before you get too excited though, it’s basically just a glorified organ. It uses three divide-down oscillators to create all the notes (plus one more for high C). So yes, you can hold down all the keys at the same time but you’re limited to a square wave. A very nice square wave, it should be noted, but just that one waveform nonetheless. The sound is further divided into synth and string sections, the former of which is pushed through a variable filter (low or bandpass), ...