Doepfer Dark Energy II - Manual (Page 18)

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Dark EnerGy II DOEPFER Functions
3.2.5. LFO1 and LFO2
A Low Frequency Oscillator produces a signal, mostly in the sub-audio range, which can be used to genera-
te periodic changes of several patch parameters. Dark Energy II features two identical LFOs.
The LFOs boast the following controls:
• Frequency control
This pot controls the LFO frequency, that means, the modulation rate.
• LFO range switch
This switch offers three different ranges for the LFO frequency: „Low“ (periods
of up to a minute) / „Audio“ (above 5 kHz) / „Medium“ (usual LFO range - several
seconds up to some 10 Hertz or more).
Since Dark Energy II‘s LFOs produce frequencies up to audio range, they can be
used to generate FM-effects with VCO pitch, VCO pulsewidth and VCF frequency
as well as AM-effects (VCA). Use this function to create complex timbres or more
abstract sound effects.
• Dual-colored LEDs (yellow/red) indicate positive and negative status. At
frequencies higher than approx. 30 Hz, the LEDs will be lit orange.
• Waveform switch
This switch selects the waveform of the LFO signal (triangle / off / square) or shuts
the LFO off. Triangular is ideal for soft modulations, square generates „trills “ in
pitch or filter frequency.
• LFO1 Output socket
The inverted output signal of LFO1 is available from this socket. You may use it for additional modulation
routings.
Internal jumpers deliver the non-inverted signal of LFO1 or the ADSR control voltage at this socket. You can
configure this jumper to your needs, but please keep in mind that opening Dark Energy II‘s casing needs
some basic skills in handiwork. If you feel unable to do this, please get in touch with Doepfer anytime (du-
ring office hours, preferably).
You will find some more information in section 3.5, „Modifications“, on page 25.