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Schlappi Engineering Interstellar Radio

Eurorack Module
By Paul Nagle

My first reaction to Schlappi Engineering's Interstellar Radio module was to express wonder and delight, followed quickly by the question: what is it? Initially, all I could work out was that it is definitely not a radio, as such. The manual explains that the IR is "a faulty transmission line", its wholly analogue design converting incoming audio to a high frequency pulse train then back again. You're given voltage control of the clocks behind the up conversion (the Carrier) and the down process (the Demodulator), all of which produces a voltage‑controlled radio transceiver designed for poor reception! Incidentally, this will be the only use of the word 'poor' in this review as the knobs are of high quality and the module is beautifully made throughout (although lovers of twinkly lights might have wished for an LED or two).

My first discovery was that the module delivers convincing impressions of deep space without any connection at the audio input. The simple...

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Published March 2019