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TheWarp analogue synthesizer (an ARP 2600 clone / reinterpretation)

TheWarp was a modern hardware reinterpretation of the legendary ARP 2600 semimodular synthesizer. Developed in 2014 by swiss electronic engineer and former Gotthard keyboardist Neil Otupacca with my consultancy, it was based on the original schematics and interely built with analogue components in traditional THT mounting and soldering process. Redesigned to fit within the standard 19" rack size, the actual instrument retained the graphic design, the size of the sections and feel of the original. Originally planned for series production with an estimated sale price around 3000 , only a full working "golden sample" was built and the project later abandoned because the minimum expected number of 50 pre-orders wasn't reached, but the production files are still available for sale to anyone interested to manufacture and sell it under his name / brand. Simply mail me if interested.


Roberto Raineri-Seith: Il sintetizzatore analogico - modelli, caratteristiche e possibilità dal neo-analogico al vintage, 47 pp. formato B5, 2a ed. riveduta e aggiornata

Il sintetizzatore analogico [.PDF, free download]


904A VCF in Eurorack by controlvoltage.org

The controlvoltage.org 904-A VCF is a DIY 14HP Eurorack-format clone of the legendary low pass filter from the Moog modular series, matching the original design and produced for personal use in traditional THT mounting and soldering process with discrete components. You can buy the production files for DIY assembly for only 20 (PayPal or Bank transfer). Please note that for sale are only the production files (PCB in Gerber format to be read with Altium or similar design software, frontpanel as .fpd to be read with Front Panel Designer) and the component list (Excel). Please also note that this project needs some experience in calibration and transistor pair matching.

Orders and inquiries: controlvoltage [at] bluewin [dot] ch


Alternate faceplates for Analogue Systems modules

Analogue Systems modules are great and the best way to get the genuine EMS sound. Unfortunately the faceplates are rather cheap, comparing to the overall excellent quality of the Asys modules. In particular the silkscreen printing is very poor and comes off easily, so i decided to redesign some Asys faceplates (RS-95-E, RS-500-E and RS-510-E) with infilled engraved scales and a reduced thickness of 1.5 mm matching the Eurorack standards. They were designed for personal use but are also available for purchase in .fpd format (Front Panel Express / Schaeffer AG). Currently available is the alternate faceplate for the RS-510-E trapezoid generator, sale price is 15 Euro (.fpd file only, PayPal).

Orders and inquiries: controlvoltage [at] bluewin [dot] ch


Roberto Raineri-Seith, P.O. Box 404, CH-6601 Locarno 1

controlvoltage [at] bluewin [dot] ch