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Introduction The ACXsynth MIDI2CV is a DIY (“do it yourself”) MIDI to CV/Gate converter for analogue modular synthesis. This project was born out of the need for an accurate and readily available eurorack DIY MIDI-CV project. As a user of modulars myself, I struggled during my DIY modular system’s infancy to find a MIDI-CV interface I could build myself.
Features and Specifications Technical Specifications • 8HP eurorack format DIY module • Requires eurorack standard +/-12V supply • Stacking board design makes for super slim module • 55mm depth Features • 12bit DACs with Intersil tunable opamps mean great CV accuracy (many commercial MIDI-CVs have only 8bit DACs) • 4x CV/Gate outputs allow for 4-note polyphony • Monophonic mode features full control of one voice (mod, pitch wheel, etc.) as well as full...
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Detailed Feature and Control Descriptions Mode Select Switch MIDI2CV has three different main modes of operation. I will do my best to explain them here. The pitch wheel is active in all modes, but, the mod wheel only functions in Monophonic mode. Polyphonic 1 Channel (position = UP): In this mode of operation it is possible to play up to 4 notes of polyphony.
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and reset outputs to control a sequencer while playing in Monophonic mode. ACT Indicator This LED is a status indicator for the module. It is lit when the module is first initialised and has yet to detect a MIDI channel. When MIDI clock is being received, it blinks along with the beat which is emitted at the SYNC output.
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Tuning Your ACXsynth MIDI2CV In order to achieve accurate CV conversion, it is necessary to tune your MIDI2CV module once you are finished building it. In order to accurately tune the module, you will need a decent multimeter. A $10 multimeter will not yield perfectly accurate results.
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