Modular Diary – 057

Thinking further on the difference between analogue circuits and digital implementations of them, and how experiments in one form of technology can be carried over into another, I found it fascinating to hear Rob Hordijk tell a little about the origins of the Blippoo/Benjolin type circuits in a video that I hadn’t come across before:

…around the year 1980 we had these EMS Putney synthesizers and we had these Revox R-77 tape recorders and with with the Putney synthesizer you could make a really nice, always changing patch, by routing, by using two of the oscillators of the Putney and using the Revox as a delay, because the Revox had three heads, a recording head and a playback head and you could record and a little while later on the playback heads you could get a signal back and because it had two tracks you could make two delays, so what you would do you would feed the output of one oscillator in the left input of the of the tape deck, then the output of that left channel on the tape deck would go into the frequency modulation input of the second oscillator, the output of the second oscillator would go into the second track of the of the Revox and the output of the second track of the Revox would go back into the frequency modulation of the first oscillator, so you would have a cross modulation system and the Revox would introduce some time delay, so the cross feedback would be delayed, and this delay sort of makes the system completely chaotic and totally unpredictable and it could just go on for hours and constantly do different things, so I remembered that and I thought that is something interesting to do in the Benjolin…

Modular Diary – 057: Thinking further on the difference between analogue circuits and digital implementations… rdgr.me/u/10jjd26

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Rudiger Meyer is a composer interested in the play between traditional concert music and new media.


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