DOEPFER Dark Energy - Page 13

13
Dark EnerGy
DOEPFER
Functionality
•PWMSourceswitch
Thisswitchchoosesthesourceofthesquarewave‘spulswidthmodulation.Theswitchtogglesbetween
LFO2,envelope(ADSR)andnosource(off).TheADSRgeneratesan„oneshot“pulswidthmodulation,
LFO2formsaperiodicandcontinousmodulation.LowLFO2frequencysettingswillresultin„wide“and
„lush“textureswhichareveryusefulforhugepadsounds.IfLFO2runsintheaudiorange(high),theVCO
generatesnoisytexturesthatwilldiffersonicallyfromFM-effects.
•Waveformswitch(saw/off/triangle)
Nexttothesquarewave,theVCOgeneratesatriangle-andsawwave.Thesumofthesquarewavesig-
nalandthewaveform,selectedwiththewaveformswitch,isfedintotheinputofthelter.Todisablethe
squarewave,movethePW-knobinfullyclockwiseorfullycounterclockwisepositionandshutoffPWMby
turningthePWMknobintofullycounterclockwiseposition.Now,onlythesaw-ortrianglewaveisaudible,
dependingonthesettingofthewaveformswitch.
TodisabletheVCOcompletely,setthewaveformswitchintooff-position,thePWknobintofullyclockwise
orcounterclockwisepositionandthePWMknobintofullycounterclockwiseposition.Usethissetting,ifyou
e.g.wanttofeedanexternalaudiosignalintothelterofDarkEnergy.
•VCOFInput
Usually,theVCOsinternalpitchCVinputisconnectedtotheoutputCV1ofthebuiltinMIDI/USBinterface.
ThisVCO-inputusesthestandard1Volt/Octavescalingwhichiscommenformostofallanaloguesynthesi-
zers.ThisenablesyoutoplayDarkEnergyjustlikeanyotherkeyboardinstrumentwithtemperatedtuning
resp.inhalftonesteps.Youdonothavetoscaleortuneanything.
IncaseyouwanttouseDarkEnerywithoutMIDI,butconnectedtoaCV/GatesequenceroraDoepfer
A-100modularsynthesizer,youwillmakeuseofDarkEnergy‘sCV-inputs.TheVCOFsocketprovidesan
externalCV-inputfortheVCOfrequency(tuning).Assoonasyoupluginacable,theVCOspitchiscont-
rolled via this input.
Pleasenotethatthissocketisnotnormalised.ThismeansthattheconnectionbetweentheMIDI/USB
interfaceandtheVCOisnotdisabledwhenacableispluggedin.TheexternalCVisaddedtothevalue,
providedbytheMIDI/USBinterface.Thisisveryusefultoe.g.transposeasequence,whichisplayedbyan
A-155stepsequencer,withthehelpofaMIDI/USBkeyboardinrealtime.
InsteadaCV/Gatesequencerorakeyboard,youmayalsouseanyothersuitableCVorevenaudiosignals
as modulation source.
•VCOPWInput
IfyouwishtocontrolthepulswidthofthesquarewavesignalwithanexternalCV,usethisinputsocket.A
change of 5 Volts covers the entire modulationrange.
IfanexternalcontrolvoltagemightnotttothespecicationsoftheDarkEnergy‘sCVinputs(VCOF,
VCOPW,VCFF,VCAA,ext.Audio),resp.itistoohighortoolow,pleaseuseanexternalattenuator(e.g.
DoepferA-183-1)oramplier(e.g.DoepferA-183-3).Theseadditionalmodulescaneasilybehousedina
DoepferA-100Minicase.