Elektor Surf Synthesizer Kit

John published several designs of the "Surf Synthesizer". first analog, then a digital version. They can all be found online. Popular Electronics, February 1972 was similar to this design. Then PIAA Electronics (Oklahoma, USA) made a kit called the "The Wind", modified slightly (I think) to sound more like wind. Then the digital version was called the "Surf Man", this version, that was published in Radio Electronics (USA) August 1992. I have a home made digital version here and I also have a version that used John's digital back end coupled to a PIC 16F for the front end timing. Here's to you John! Many years of fun I have had looking at and building your designs! :-)