Cosmic Instruments 10HP voltage controlled oscillator Eurorack module based on the famous CEM3340/AS3340 chipDesigned by Cosmic Instruments in Netherlands
About this module This 10HP Eurorack module has all the features a basic VCO needs. The module is based on the famous CEM3340/AS3340 chip. It outputs multiple waveforms, namely, square waves, triangl…Read More…
This 10HP Eurorack module has all the features a basic VCO needs. The module is based on the famous CEM3340/AS3340 chip. It outputs multiple waveforms, namely, square waves, triangle waves and sawtooth waves. The frequencies of all these waveforms can be voltage controlled using either the V/oct input or the vanilla frequency CV input. Next to that it has more advanced features like hard and soft sync, and also includes a knob and CV input for pulse width modulation. All in all, a great VCO to add to your Eurorack modular synthesizer.
Hey folks! Here are some steps to get your Cosmic Instruments 3340 VCO in tune. Note that if you don’t have a device that supports V/Oct, there is no need to tune it. You can then just adjust the knob and trimpot to you liking.
This approach basically only tunes 2 octaves, although the other ones should also be reasonably in tune. To get a more accurate tuning you can also tune over more octaves (e.g. use C3 and C7).
Cosmic Instruments started off as a synth DIY hobby project and mostly consisted of hand-soldered protoboard modules and hand-drawn front panels. At some point my setup required more robust and reliable modules. I converted many of my modules to PCB designs and also started making professional designs for the front panels. Now, after many iterations of my designs, I feel that my modules are ready be used by other people around the world. Tindie seemed to be the right place to start...
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Jeremy | Jan. 26, 2022
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