The AM1020 is a completely new complex VCO design for the 100M eco-system and is inspired by the discontinued Instruo Troika. An ultra stable VCO delivers four waveforms that can be mixed and blended to create complex wave shapes, by using two wave shapers to create new sounds! Description The VCO is based on the […]
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The AM8113 is a completely new complex VCO design for the 100M eco-system and is inspired by the discontinued Instruo Troika. An ultra stable VCO delivers four waveforms that can be mixed and blended to create complex wave shapes, by using two wave shapers to create new sounds! Description The VCO is based on the […]
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A 16HP Eurorack module which reimagines the Roland prototype of 1978, with a couple of twists. The VCO and sub from the SH-101, combined with the cascaded ladder filter from the Korg Monopoly. This module produces new sounds, completely different to the standard Roland OTA filter. Both VCO and VCF chips are manufactured by Coolaudio. […]
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This 8HP module expands the capability of the Behringer 1004 VCO by adding the waveform mixer from the original ARP 1004P. The module delivers all five waveforms independently, as well as mixing them into a single output. Description The AM1004P module enables the Behringer 1004 module to be transformed from a T (toggle) version into a […]
Continue ReadingOverview In March 2023 I acquired a computer card from an old DEC PDP computer, the flip chip M401. It was originally launched in 1967 as part of the updated PDP-8/I mini computer. It’s a small single -sided PCB that holds a vintage oscillator that can be externally controlled; frequency and on/off. The original cards […]
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The AM8200 module is faithful replica of the voltage controlled oscillator from the legendary Roland SH-2 that was released in 1979 and proved very popular, with over 7,300 sold. The AM8200 is a fantastic sounding traditional analog VCO with that unmistakable Roland sound, in a narrow skiff friendly Eurorack module. Description The original SH-2 uses […]
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This 10HP module is replica of the VCO from the legendary Roland SH-101 which was launched in November 1982 and became one of Roland’s most popular analog synths with 8,000 sold over 5 years. The re-issue of the CEM3340 in THD from both CEM and Alfa Rpar enabled me to start production of the module, […]
Continue ReadingIntroduction The Roland Jupiter 6 (and MKS-80) use a custom hybrid chip (EHM-S226W83S ) for transforming the CEM3340 oscillator waveforms to a consistent level of 5v centered around 0V (-2,5V to +2.5V). The CEM3340 creates waveforms that are at different levels (Pulse 0 to +12V, Triangle 0 to +5V, Sawtooth 0 to +10V) which need […]
Continue ReadingOverview In December 2021 one of my customers asked me if I could build the 901A/B VCO’s as an AMSynths product. In the past I had rejected the idea as they are relatively unstable and I cant get anywhere close to a Behringer 921A/B price point. However I have a small stock of CA3019 diode […]
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Introduction One of the projects I worked with Behringer on during 2019/20 was the range of ARP 2500 clone modules, and the toughest modules to get right were the 1004 VCO and 1050 Mix Sequencer. I bought a Behringer 1004 module in September 2021 to see how well the VCO had turned out and to […]
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