Electronic Dream Plant wasp User manual

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KEYBOARDSECTION
Thetwooctavekeyboardcontrolsthe fre-
quencyoftheoscillatorsandfilter.The con-
ductivityofthefingerstouchingthekeyboard
providesthemeansbywhichthedigital
sensorselectsa particularfrequencywhichin
turnensuresthattheoscillatorsareconstantly
intune. You willfinda holelocatedabove
thetopnoteofthekeyboard;throughthis
holethereis apre-ser (asmallscrew)forad-
justmentofthekeyboard'touch' sensitivity.
An adjustment maybenecessaryduetovary-
ingfingersizes.
Thekeyboardalsoprovidesa triggerwhich
setsofftheenvelopegenerators(seeEnvelope
GeneratorsandOutputsections).
Onthecontrolpanel thereisa 'bend'knob
whichisnormallysetinthecentreposition
andbyturning this knobtoeitherside,one
canshiftthekeyboardpitchupordown.
Belowthe'bend'knobthereisanotherhole
containinganotherpre-setforalteringthe
tuningrangeofthekeyboard.Whenyoure-
ceiveyour 'WASP' youwillfindthekey-
boardtunedtoconcertpitch (A=440), but
thispre-setcanbeusedshouldyouwish
differenttuning.
Thelowerknobisa 'glide'control,which,if
turnedclockwiseslowsdownthechangefrom
onenotetoanother:(thisisalsoknownas
'portamento').
OSCILLATORS
Therearetwosignaloscillatorsinthe'WASP'.
Oscillator1:theterm'feet'(FT)isusedas in
organsbecausethelengthofanorganpipe
determinesitsnote;whenthelengthishalved,
thenoteincreasesbyanoctave.Youwill
find5 switchpositionswhichrangefrom'32'
footto'2'foot,andthisprovidesa five
octaverange.
Theright-handknobhasthreeposition,'OFF',
'sawtooth', and'square'wave.
Thesquarewaveislinkedtothecentreknob
whichcontrolsits width.
Oscillator2:thishassimilarcontrolsexcept
forthe'pitch'controlwhichallowsthein-
tervalbetweenthetwooscillatorstobead-
justed.
Byusingthe'glide'control,thetuningofthe
twooscillatorsisoffsetduringtheglidepro-
ducinganinterestingeffect.

Thisisa lowfrequencyoscillatorwhich
providesnosounditselfbutcanbeusedto
controlbothoscillatorsandfilter.The 'fre-
quency'knobadjuststhespeed,and'pitch
mod.' controlsthetwooscillators.
The6-wayswitchonthelowerrightprovides
thechoiceofcontrol.Thesecontrolsare sine
wave(vibrato),risingsawtooth,falling saw-
tooth, squarewave,noiseandrandom (RND),
whichturnsona sampleandholdcircuit.
Noisesignal:thisknobproduceswhitenoise,
whichisusefulforpercussionsounds.
FILTERSECTION
Therearethreetypesoffilteringavailable:
low pass, bandpassandhighpass.Allhavean
adjustable 'Q' whichresonatesthefilterto
enhanceindividualharmonics,A manual
controladjuststhefilter's frequency.
Control: thesetwoknobssituatedbeneath
thefilterareusedtocontrolthefilterfrom
thecontroloscillatorandcontrolenvelope
(see'control Env.'). Theyaresetincentre
positionandhave'+'and'-'functions,
i.e.a risingsawtoothcancontroltheoscilla-
torswhilstthereverse(falling)isavailableto
controlthefilter.
CONTROLOSCILLATOR

ENVB-OPCOBNERATam
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ENVELOPEGENERATORS
VCAEnv.:thiscontainsthreeknobs:attack,
decayandsustain/repeat.
Attack:thisincreasesthevolumeofthe sig-
nalata ratesetbyitsposition.
Decay:thishasa dualfunction.Firstlyit
comes Into effectdirectlyafterthe'attack'
andreducesthevolumeofthenoteat a rate
setbyitspositionwhilethefingerremains
onthekeyboard.Secondly,whenthefinger
hasbeenremoved,itcomesinagainafterthe
'sustain level'toproduceacontrolledfading
ofthenote.
Sustainlevel/repeat:whilethefingerremains
onthekeyboard,thiscontrolsthevolumeof
thenote.Byturningtheknobtotheleft
untilitclicksyouarethen bringing inthe
'repeat' facility. Thisoperatesattackand
decaywhichcontrolsthespeedoftherepeat.
ControlEnv.:thisisa separateenvelope
whichisonlyusedtocontrolthefilter {see
Filter section} andprovidesaseparateattack,
decayandrepeatfacility.Italsohasa 'delay'
knob; whenturnedtotherightthisproduces
uptooneseconddelay.
Linksockets;these 7-pin DINsockets eneble
anynumberof'WASPS'tobeconnectedto-
gether.Infuturethesewillbeusedto con-
nectadditionalaccessoriessuchasdigital
sequencerswhentheybecomeavailable.
OUTPUTANDLINKSECTION
Thevolumecontrolisalsoa poweroff
switch; pleaseensurethattheWASP'isswit-
chedoffafterusetopreservebatterylife.
Line out:thissocketswitchesoffthein-
ternalloudspeakerwhenpluggedinand
enablesyoutousealternativeamplification.
Phones:this is asocketforstereohead-
phones,whichalsoswitchesoffthe loud-
speakerwheninuse.(NOTE:Theoutput
willbemono.)
9VDCmainsadaptor:a 9 voltsDCcalculator
typeadaptormaybeusedinsteadofbatteries.
BATTERIES
Whenthebatterieshaverundown,the
touchkeyboardwillnotoperateproperly
andtuningmaydrifta little.
Six 'C sizebatteriesareused;highpower
typessuchas HP11 arerecommended.A
batterysymbolinthebatterycompartment
showshowtofitthem.

TechnicalData
BEND:— Approximatelyonetoneupor
downwith90°centre"deadband".
TUNE:— Approximatelyonetoneupor
down(presetto A<=440 Hz).
GLIDE:- adjustableupto3 secondsweep
overtwooctaves.
Turnoverfrequencyisproportionally con-
trolledbycontrol oscillator", controlenvelope
generator" andmanualfrequencycontrol.
Turnoverfrequencyisalsoproportionally
controlledbykeyboard.Frequencyrange
3-16KHz
"continuously variablecontrolfrom+Veto-Ve
1. VGA ENV. GEN.:-linear attackrate
variablefrom3mSec.to2 Sec.
Exponentialdecayratevariablefrom
3mSec.to 12 Sec. Decayisinterrupted
bya sustainperiodwhilethekeyboard
isbeingtouched.Thesustainsignal
levelisadjustable.Therepeatfunction
causescontinuousattack/decaycycles
whilethekeyboardisbeingtouched.
2. ControlENV.GEN.:TriggeredbyVCA
ENV.GEN.viadelayadjustableupto
1Sec.Linearattackanddecayrates
separatelyadjustablefrom15mSec.to
6Sec.Repeatfunctioncauses con-
tinuousattack/decaycyclestooccur.
FILTER POWER
INTERFACE
KEYBOARD
OSCILLATORS
Oscillator 1! choiceoffiveoctaves- 32'to
2' sawtoothorpulseadjustablefrom10%to
50% dutycycle.
Oscillator2:Asoscillator 1 butwith saw-
toothorsquarewaveform;pitchcontinuously
variableovermorethanoneoctave,encom-
passingoscillator 1 pitch.
CONTROLOSCILLATOR
1Hzto100Hzapprox.
Sine, risingorfallingsawtooth,or,square
waveform.Alsoavailableforcontrolarewhite
noiseornoisesampledandheldatcontrol
oscillatorrate.Pitchofoscillators1 and2 can
bemodulatedby approx. ± 1 tonefrom con-
troloscillator.
NOISE
ENVELOPEGENERATORS.
OUTPUTS
Poweron/volumecontroladjustsline
output, headphonesoutputandloudspeaker
level.
Nominaloutputcharacteristicsatfull
volume:—
Lineoutput:- 10dBM, 6000
Headphoneoutput:- OdBM, 50fi
Noiselevelatlineoutputinquiet state;-
65dBM
Levelcontroladjustsamountofwhitenoise
addedtooscillatorsignals(Oscillators1and
2).
Lowpass,bandpass(fixedbandwidth)or
highpass.'Q'factoradjustablefrom maxim
allyflattovergeofoscillation.
Automaticoverload Iimiter.
12dB/octaverolloffinloworhighpass.
6dB/octaveinbandpass.
Consumption45mAwithspeakernotisuse
150mAatmax. speaker volume.
Threestateinterfacelines- one trigger and
6codelines.

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