Unfortunately, I have a version 1 DE and I don’t feel like soldering on my own op-amp.įor the technically inclined, read all the details of the CEM3394 chip, the heart of the Dark Energy (and other legendary synths, like the MC-202, SH-101, etc.), here: Doepfer does note that accessing the triangle wave (the oscillator used for linear FM) is possible, but you’d have to buffer it (send it through an op-amp). The CEM3394 is a “synth-on-a-chip”, so the raw oscillator goes through the VCF and VCA, to the output there’s no way to bypass or “patch into” this path. If you own a newer Dark Energy the buffer is already on board (if JP13 is available you own a new version with buffer for VCO triangle out and VCF out). Only the triangle is available at the VCO capacitor. You will see that the VCO waveforms are not accessible because they are internally processed. The Dark Energy uses a CEM3394 for sound generation.
To carry out modifications you should have some electronic experience. (Of course, this makes perfect sense to me now that I understand how to read schematics!) Soon after I published this guide, I sent an email to Dieter Doepfer, the man himself, asking about why getting the raw waveforms was not possible from the DE. (The device is already very full-featured and I love it.) Who knows? All I know is that there are a few things I wouldn’t mind having access to: LFO2, OSC out (pre-filter)…uh, well that’s it I guess. Or maybe they’re planning an expander or something. They went about 85%, then ran out of room on the front panel, I guess. So you just got yourself a Doepfer Dark Energy semi-modular analog synthesizer and have wondered why in the world they didn’t bother patching out more elements.
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