An article via 1982's E&MM in via noyzelab. You can find additional scans of Electronics & Music Maker at noyzelab's site here.
Robert Schroeder composed his own electronic music, was friends with and worked with Klaus Schulze. The following are a couple of excerpt on the article regarding his designs which you can see pictured:
“The synthesizers and sequencers used on “Harmonic Ascendant” were all designed and built by Robert. All the synthesizers were monophonic. I asked him if he had ever designed or built a polyphonic synthesizer or had any plans for doing so in the future; his answer was a very definite ‘No!’”“After the release of his first album, Robert wrote a book entitled “Sequencer - Ein Musikcomputer(?)”. Available only in German, it gives full details on how to build a complete 30-note sequencer, including component lists, PCB patterns and circuit diagrams, all designed by the author himself. He claims it can be built for a tenth of the price of commercially available sequencers in Germany.”
Note this is the first post to feature Robert Schroeder as a maker.
Side note: I was curious what happened to Electronics & Music Maker and did a lookup on Wikipedia. There isn't an article on the magazine however it was mentioned in a number of other articles including one on Mark Jenkins who has been featured here on MATRIXSYNTH a few times. Mark was the Music Editor for the magazine.
