This is a live demo of how to program the Vintage Casio CZ-1. This was the flagship Synth of the CZ range which included these synths - CZ-101, CZ-1, CZ-1000, CZ-3000, CZ-5000.
In part 3 - I take a "voice" or sound patch if you like, and go through each of the parameters, explaining what they do and demonstrating by playing with the values.