Internal CV input for frequency (1V/octave) connected to the CV1 output of the built-in USB/Midi interfaceīecause of the pure analog circuit and the temperature control it may take up to 30 minutes until the VCO is in tune.ġ2dB multimode filter with lowpass, notch, highpass and bandpass The sum of the waveform chosen by this switch and the rectangle is fed into the VCF (to turn the rectangle off the PW control has to be set fully CCW)Įxternal CV input for VCO frequency (1V/octave)Įxternal CV input for external PWM of the rectangle Waveform switch (sawtooth / off / clipped/inverted sawtooth) PWM control with modulation source switch (LFO2 / off / ADSR) Manual pulsewidth control for rectangle waveform Manual tune control (with an internal jumper the range can be set to ~ +/-1 half an octave or ~ +/-2.5 octaves)įM (frequency modulation) control with modulation source switch (LFO1 / off / ADSR) The distance between the controls is a bit wider compared to A-100 modules and knobs with vintage look are used.VCO High quality potentiometers with metal shafts are used and each potentiometer – except the filter mode control – is fixed to the case (no wobbly shafts and knobs). Dark Energy is built into a rugged black metal case with wooden side plates. The sound generation and all modulation sources are 100% analog, only the USB/Midi interface contains digital components.

In the following description of the Dark Energy II the differences to Dark Energy I are marked blue:ĭark Energy II is a monophonic stand-alone synthesizer with USB and Midi interface. But the basic sound of Dark Energy II is clearly different from version I because of the new circuits for VCO, VCF and VCA.

The new Dark Energy II looks like the Dark Energy I at first sight. As the Dark Energy (I) had to be discontinued because an important electronic part (CEM3394) is no longer available we decided to do a redesign of the Dark Energy.

Doepfer dark energy patch sheet