DOEPFER Dark Energy - Page 30

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Dark EnerGy
DOEPFER
Basics of Soundgeneration
Low Frequency Oscillators
AnLFOisaLowFrequencyOscillatorwhichgeneratesfrequentcontrolvoltagesoverawiderange.Itcan
provideseveralwaveforms.BothLFOsofDarkEnergyprovidetriangleandsquarewaveforms.Thelatter
canbeusedfor“jumps”inmodulationwhilethetrianglewavecreatescontinousmodulations.TheLFOs
canbeusedasmodulationssourcesforallofDarkEnergy’simportandsoundparameters.
Interaction
Thefollowinggureshowstheinteractionofalltheabovementionedcomponents.Itshowstheaudiosignal
path(darkercoloured)withoscillator(“rawsound”,pitch),lter(timbre)andamplier(loudness).Nextto
thesemodulesyouseethemodulatingorcontrollingelements(envelopegenerator,LFO)whichprovidethe
necessary control voltages to control the parameters of the aforementioned components.
Keyboard /
MIDI-Interface
Oscillator
(VCO)
Filter
(VCF)
Amplifier
(VCA)
Low Frequency
Oscillator
(LFO)
Envelope-
Generator
(ADSR)
Audio
Output
Gate Signal
Envelope Control Voltage
LFO Control Voltage
Pitch
Control Voltage
Audio
Audio
Audio
Ifyoufeellikegoingdeeperintothesecretsofsoundsynthesis,pleasecheckoutthisbook:
AllenStrange,ElectronicMusic–Systems,TechniquesandControls,2ndedition,Wm.C.BrownCompany
Publishers,Iowa,ISBM0-697-03602-2
Thisisoneofmostcompleteandusefulpublicationsaboutsoundsynthesisandsynthesizers,suitablefor
newcommersandmoreadvancedmusicians.