ABSTRACT

INTRODUCTION )F %1 AND COMPRESSION ARE THE FOUNDATIONS UPON WHICH A GOOD MIX IS BASED THEN TIMEDOMAIN ANDMODULATION EFFECTS ARE DElNITELY THE FAIRY DUST SPRINKLED OVER A MIX 4IME DOMAIN EFFECTS CAN TAKE AN OTHERWISE mAT AND UNINTERESTINGCOLLECTIONOFSOUNDSANDPUTTHEMINTOWHATSEEMSLIKEATHREE DIMENSIONAL PLACE AND THAT HAS THE EFFECT OF BRINGING EVERYTHING TO LIFE )TS LIKE THE DIFFERENCE BETWEEN LOOKING AT A PHOTOGRAPH IN A HOLIDAY BROCHURE ANDACTUALLYBEINGTHERE4HESAMETHINGAPPLIESTOSOUNDSINAMIXTHATHAVE SOMEKINDOFTIMEDOMAINEFFECTSAPPLIEDTOTHEM4HECOMBINATIONOFREVERB EFFECTS EVEN IF THEYAREVERY SUBTLE ANDDELAYEFFECTSPROVIDESUSWITHDEPTH ANDEVENHEIGHT INSOMEINSTANCES TOCOMPLEMENT THEWIDTHTHATWEHOPE FULLY ALREADYHAVEINOURMIX4HESEEXTRADIMENSIONSMAKEEVERYTHINGSOUND MORENATURAL

%VERY PLACEWElNDOURSELVES IN BIG OR SMALL INDOORS OR OUTDOORS GIVES US SOME KIND OF SENSE OF AN ACOUSTIC hSPACEv WE EXIST IN 3UBTLE REmECTIONS OF SOUNDSAGAINSTSURFACESDElNETHISSPACEGIVINGUSANIMPRESSIONOFHOWBIG ORSMALLITISWHATSHAPEITISANDWHERESOUNDSARECOMINGFROM)FYOUHAVE EVERHAD THE CHANCE TO STAND INANANECHOIC CHAMBERYOUWILL KNOWWHAT A WEIRDSENSATIONITISANDHOWITALMOSTMAKESITFEELLIKEYOURVOICEISSOUND INGONLYINSIDEYOURHEAD)TSATRULYSTRANGEEXPERIENCE3IMILARLYSONGSTHAT HAVENOTRACEOFambienceABOUTTHEMANDTHISCOULDEASILYBETHECASEWITH ELECTRONIC MUSIC IF THE SOUNDS ARE ALL GENERATED ARTIlCIALLY SOUND TOTALLY UNNATURAL )FWE ARE LISTENINGON SPEAKERS AT LEAST THEPOSITIONOF THE SPEAK ERSANDTHEACOUSTICCHARACTERISTICSOFTHEROOMWEARELISTENINGINWILLGIVEUS SOMESENSEOFSPACEEVENIFITISVERYNARROWANDISOLATED,ISTENINGONHEAD PHONES TO A TRACK WITH ABSOLUTELY NO REVERB OR DELAY ANYWHERE HOWEVER IS VERYODD)TSLIKEEVERYSOUNDSEEMSTOBECOMINGFROMINSIDEYOUROWNHEAD RATHERTHANEXISTINGINTHEWORLDOUTSIDEYOU4OSOMEEXTENTHEADPHONESCAN DO THIS ANYWAYBUT THENORMALNARROWING EFFECTOFHEADPHONES ISMASSIVELY COMPOUNDEDIFTHEREARENOTIMEDOMAINEFFECTSTOHELPPUSHTHESOUNDOUTOF OURHEADSANDINTOSPACE

-ODULATIONEFFECTSONTHEOTHERHANDAREUSEDMORETOGIVEASENSEOFMOVE MENTTOASOUNDANDBYTHAT)MEANMOVEMENTINATONALSPECTRALWAYRATHER THAN IN A SPATIAL WAY !LMOST ALL MODULATION EFFECTS SUCH AS CHORUS mANG INGPHASINGANDENSEMBLEEFFECTS WORKBY LAYERING THEORIGINAL SOUNDWITH A COPY OF THAT SOUND AND THEN ADJUSTING SOMETHING ABOUT THE RELATIONSHIP BETWEENTHOSETWOVERSIONSOFTHESOUNDINACYCLICMANNER4HISDOUBLINGUP OFSOUNDSGIVESATHICKENINGEFFECTTOTHESOUNDANDIFTHEEFFECTISATRUESTEREO EFFECTPOSSIBLYAWIDENINGEFFECTASWELL7HENTHELAYEREDCOPYISMODULATED INSOMEWAYTHEREISALSOATONALVARIATIONOVERTIMEWHICHCANGIVEASENSEOF SPECTRALMOVEMENTTOTHESOUND

TIME DOMAIN: REVERB 2EVERBISALMOSTCERTAINLYONEOFTHEMOSTIMPRESSIVEANDUSEFULEFFECTSWECAN HAVEATOURDISPOSALBUTISALSOONEOFTHEMOSTMISUNDERSTOODMISUSEDAND GENERALLY OVERUSED EFFECTS 2EVERB IN ONE FORMOR ANOTHER IS ESSENTIAL TO ANY TRACKWEAREWORKINGON%VENSONGSTHATSOUNDLIKETHEYDONTHAVEANYREVERB ONTHEMPROBABLYDOEVENIFITISEXTREMELYSUBTLEANDONLYUSEDONAFEWOF THE PARTS IN THEMIX 4HE BIGGEST PROBLEMWITH REVERB IS THAT IT IS EXTREMELY EASYTOGETCARRIEDAWAYANDENDUPUSINGFARTOOMUCHOFIT!NOTHERPROBLEM INMYOPINION ISUSINGTHEwrong REVERBONCERTAINSOUNDS4HATMIGHTSEEM STRANGE CONSIDERING THAT REVERB IS JUST A COLLECTION OF ECHOESMADE BY A PAR TICULARSOUNDAGAINSTTHEWALLSANDSURFACESOFAPARTICULARSPACE(OWCANONE REVERBBErightANDANOTHERwrong

"EFORE THE DAYS OF ARTIlCIAL REVERB EFFECTS HARDWARE AND SOFTWARE ONE KIND OFREVERBWASMADEBYASOUNDOCCURRINGINASPACE/FCOURSETHEREWEREAN INlNITENUMBEROFDIFFERENTSOUNDSOCCURRINGINANINlNITENUMBEROFDIFFER ENTSPACESBUTTHEMECHANISMBYWHICHTHEREVERBWASCREATEDWASALWAYSTHE SAMETHEREmECTIONOFSOUNDWAVESINAREALPHYSICALSPACE7HENWESTARTED TOMAKEARTIlCIALREVERBEFFECTSWEBEGANUSINGDIFFERENTMEANSTOCREATETHEM AND AS A RESULT EACH HAD DIFFERENT SONIC CHARACTERISTICS OVER AND ABOVE THE MINORDIFFERENCESBETWEENEACHINDIVIDUALDESIGNORUNIT4WOEARLYHARDWARE METHODSUSEDFORCREATINGARTIlCIALREVERBWEREspring reverbsANDplate reverbs 4HEIRTWODIFFERENTMETHODSFORCREATINGREVERBORMOREACCURATELYAREVERB TYPEEFFECT GAVENOTICEABLYDIFFERENTENDRESULTSANDASSUCHLEDTHEMTOBE USEDPRIMARILYFORDIFFERENTAPPLICATIONS3PRINGREVERBSHAVEBECOMEMOREOR LESSSYNONYMOUSWITHGUITARAMPLIlERSWHILEPLATEREVERBSAREUSEDMAINLYFOR VOCALSANDPERCUSSIVE SOUNDS4HEWAYEACHOF THE TWOMETHODS RESPONDS TO DIFFERENT FREQUENCIES AND DIFFERENT DYNAMIC CHANGESMAKES THEMMORE SUIT ABLEFORONEAPPLICATIONTHANANOTHER4HEUSUALCAVEATAPPLIESJUSTBECAUSEA SPRINGREVERBISnormallyUSEDFORGUITARSTHATDOESNTMEANITCANTBEUSEDON DRUMSORVOCALSORANYTHINGELSEYOUCHOOSE

7HEN DIGITAL ALGORITHMIC REVERBS CAME ALONG THEY FURTHER COMPLICATED THINGS BY OFFERING UP THEIR SIMULATIONS OF DIFFERENT KINDS OF PHYSICAL ROOMS RANGINGFROMLARGEHALLSTOMEDIUM SIZEDSTAGESANDROOMSALLTHEWAYDOWN

TOSMALLROOMSANDCHAMBERS3OMEALSOOFFEREDPLATEREVERBSIMULATIONALGO RITHMS%ACHMANUFACTURERDEVELOPEDITSOWNALGORITHMSANDASA RESULT THE SOUNDOF A ,EXICON hHALLv ALGORITHMMIGHTBE VERYDIFFERENT FROM THE SOUND OF A9AMAHA hHALLv ALGORITHMEVEN IF BOTHUNITSWERE SET UPWITHOSTENSIBLY THESAMEPARAMETERS!NOTHER TYPEOF REVERB ISAconvolution REVERB4HIS TYPE ALLOWSUS TOPROCESS SOUNDSUSING RECORDINGSMADE IN REAL ROOMSANDSPACES FROMTHEcapturedACOUSTICSOFTHATSPACE4HISREALLYWASAREMARKABLEDEVELOP MENTANDALLOWEDFORREVERBEFFECTSWITHADEGREEOFREALISMNEVERPREVIOUSLY HEARD ASSUMING THAT THE RECORDINGS OR impulse responses AS THEY ARE USUALLY KNOWN WEREWELLDONEINTHElRSTPLACE

7ITHALLOFTHESEDIFFERENTOPTIONSAVAILABLETOUSHOWCANWEPOSSIBLYKNOW WHICHISTHERIGHTREVERBORPERHAPSLETSJUSTSAYTHEbestREVERBTOUSEINANY GIVENSITUATION)NORDERTOlNDOUTTHEREARETWOFACTORSYOUHAVETOCONSIDER THElRSTISTHELENGTHORSIZEOFTHEREVERBANDTHESECONDISTHETONALCHARAC TER)FYOUWANTTOAPPLYREVERBTOASOUNDTOMAKEITFEELLIKEITEXISTSINAREAL SPACEWHILESTILLNOTSOUNDINGOBVIOUSLYLIKEREVERBYOUAREPROBABLYLOOKING FORAREALISTICSOUNDINGREVERBWITHASHORTDECAYTIMEWHICHWILLENDUPBEING QUITELOWINTHEMIX9OUMIGHTWANTTOAPPLYTHEREVERBONABUSSOTHATSEV ERAL DIFFERENT SOUNDSOR INSTRUMENTS CANBEPASSED THROUGH IT AT ONCE GIVING THEM ALL THE IMPRESSION OF EXISTING IN THE SAME SPACE ! CONVOLUTION REVERB

WOULDBEAGREATCHOICEINTHISREGARDBECAUSEWITHTHERIGHTIMPULSERESPONSE LIBRARY TO CHOOSE FROM THEREWOULDUNDOUBTEDLYBE ANUMBEROF VERY GOOD SMALL ROOMORSMALL CHAMBERTYPEPRESETSTHATWOULDGIVETHATSENSEOFATHIRD DIMENSIONWITHOUTEVERSOUNDINGLIKEREVERBINTHEWAYMOSTPEOPLEIMAGINE IT9OUCOULDPERHAPSEVENUSEAMEDIUM SIZEDROOMORSTAGEIMPULSEIFYOU WANTEDASLIGHTLYBIGGERWIDERDEEPERANDMOREAIRYSOUND)FONTHEOTHER HANDYOUWANTASOUNDTOHAVEACLEARANDOBVIOUSREVERBAPPLIEDTOITYOU WOULDPROBABLYNEEDTOLOOKATALONGERREVERBEFFECTANDTHISCANREALLYOPEN UPYOUROPTIONS

9OUMIGHTTHINKYOUSHOULDUSECONVOLUTIONREVERBSFOREVERYTHINGGIVENTHAT THEY PRETTYMUCH ACCURATELY REPRESENT REAL ACOUSTIC SPACES !FTER ALL SURELY THAT WOULD SOUND THE MOST NATURAL AND REAL TO US 7ELL YES TECHNICALLY IT WOULDBUTTHETROUBLEISTHATMOSTOFUSHAVEGROWNUPACCUSTOMEDTOHEAR INGSONGSPRODUCEDANDMIXEDUSINGARTIlCIALREVERBEFFECTSANDUSINGSOUNDS THAT ARENT NATURALLY OCCURRING THEMSELVES EITHER "ECAUSE OF THIS ALGORITHMIC REVERBSSOUNDJUSTASNORMALTOUSASREALACOUSTICSPACESANDTHEREFORECON VOLUTIONREVERBS DO!DDTO THIS THE FACT THATNOTEVERYBODYWANTS TOPURELY CREATEASENSEOFAREALACOUSTICSPACE4HISISAGOODTHINGTODOANDANUM BEROF SOUNDS COULDHAVEA SIMULATION TYPE REVERBAPPLIED TO THEMBUT YOU MIGHTWANT TOHAVEANhEFFECTv REVERBONAPARTICULAR SOUND TOHELP SEPARATE IT OUT FROM ALL THE OTHERS IN A VERY DISTINCTIVEWAY 4HE REAL BEAUTY OFMOD ERNMUSICPRODUCTION IS THAT IT ALLOWSUS TO CREATE SOUNDS ANDMUSICAL AND ACOUSTICWORLDS THAT HAVE NEVER EXISTED BEFORE )TWOULD BE A SHAME NOT TO TAKEADVANTAGEOFTHAT

4HEREISHOWEVERANINHERENTDANGERINHAVINGALLOFTHESEOPTIONSAVAILABLETO USh7ITHGREATPOWERCOMESGREATRESPONSIBILITYvASTHESAYINGGOES4HEDAN GERWEFACEISINAPPLYINGADIFFERENTREVERBTYPEORSIZETOEVERYSOUNDINTHE MIXJUSTBECAUSEINISOLATIONTHEREVERBWECHOSESOUNDSREALLYGOODONEACH INDIVIDUALSOUND7HENTHEYAREALLMIXEDTOGETHERHOWEVERTHEREISNOCOHER ENTSENSEOFSPACE.OTWOSOUNDSAPPEARTOEXISTINTHESAMEWORLDWITHSOME SOUNDINGLIKETHEYAREINASMALLREmECTIVEROOMANDOTHERSWHICHshouldBE INTHESAMESPACEFOREXAMPLEDIFFERENTPERCUSSIVESOUNDS SOUNDINGLIKETHEY AREINALONGTUNNELCLADWITHCOTTONWOOL4HISLACKOFFOCUSCANBEVERYCON FUSINGFORTHELISTENER.OTSOMUCHONACONSCIOUSLEVELBUTMOREONASUB CONSCIOUShSOMETHINGJUSTDOESNTSOUNDRIGHTvLEVEL7ITHTHISINMINDWHEN )TALKABOUTCHOOSINGTHEhRIGHTvREVERBFOREACHSOUND)DONTNECESSARILYMEAN THATEACH REVERBHAS TOBEDIFFERENT/N THECONTRARY ) THINK THERE SHOULDBE JUSTA FEWMAINREVERBSSETUPINITIALLY THATAREAVAILABLEASAUXILIARYSENDSSO THATMULTIPLE SOUNDSCANBESENT TO THEMOTHERMORESPECIlC REVERBSCANBE CHOSENFORhSTANDOUTvSOUNDSORFORPARTICULAREFFECTS4HISWILLGIVEAFARMORE COHESIVEENDRESULTWILLUSELESS#05POWERWHICHMAYORMAYNOTBEAPROB LEMFORYOU ANDISINMYOPINIONFARLESSLIKELYTOLEADTOREVERBOVERLOAD

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/NEMETHOD )USE TOCOMBAT THIS IS TO SOLO THE SOUNDANDADJUST THE REVERB LEVELPERHAPSTWEAKINGPARAMETERSIF)AMUSINGANINSERTREVERBTOGETAFEEL FORWHERE)THINKTHEREVERBSHOULDBEANDTHENONCE)HAVETAKENTHESOLOOFF )WILLLIKEMOSTPEOPLEFEELTHATITISNTLOUDENOUGH)WOULDTHENADJUSTTHE LEVELUPWARDUNTIL)FELTITWASABOUTRIGHTBUTTHENCRUCIALLY)ALWAYSREDUCE IT AGAIN BY A SMALL AMOUNT BECAUSEMOST REVERBS EXCLUDING hSPECIAL EFFECTv REVERBS WORKMUCHBETTERWHEN THEYARE SUBTLE%VEN THOUGH ITGOESAGAINST MYINSTINCTSINSOMEWAYS)TENDTOADJUSTREVERBLEVELSWITHTHISINMINDif I can hear it clearly and obviously then it is too loud

!NOTHERMETHOD THATCANWORKQUITEWELL IFYOUAREUSING REVERBSMAINLYON AUXILIARYSENDS IS TOSETUPALL THEREVERBSENDLEVELS TOWHEREYOUTHINKTHEY SHOULD BE AND THEN EITHER WITHIN THE REVERB PLUG IN ITSELF OR POSSIBLY AS A SEPARATE%1AFTERWARDS)WILLAPPLYALOW CUTlLTERAHIGH CUTlLTERORPOSSI BLYEVENBOTHTOREMOVESOMEWEIGHTANDDETAILFROMTHEREVERB4HISMAKES IT SOUND A LITTLE MORE DISTANT AND A LITTLE LESS A PART OF THE SOUND WITHOUT ACTUALLYADJUSTING THEVOLUMEATALL4HISHAS THEOVERALLNETEFFECTOFMAKING THEhDRYvSOUNDSSEEMMOREDOMINANTANDTHEREFORELOUD COMPAREDTOTHE REVERB4HEDOWNSIDEOFTHISMETHODISTHATITCANCHANGETHECHARACTEROFTHE REVERBITSELFANDITMAYSTARTTOMAKEYOURhTILEDBATHROOMvREVERBSOUNDMORE LIKEAWOODENCUPBOARDUNDERTHESTAIRS/FCOURSEINADDITIONTOTHE%1lL TER OPTION YOU COULD ALWAYS JUST LOWER THE LEVEL OF THE OUTPUT OF THE REVERB IN QUESTION BUT THEN IN EFFECT YOU ARE DOING EXACTLYWHAT ) DID IN THE lRST METHOD)DESCRIBED

!SWITHSOMANYASPECTSOFMUSICPRODUCTIONANDTHEREFOREREMIXING REFER ENCINGOTHERMATERIALTHATYOULIKETHESOUNDOFISALWAYSHELPFUL)TCANACTU ALLYBEAREALEYE OPENEROREAR OPENER TOHEARHOWLITTLEREVERBTHERESEEMS TO BE ON MANY RECORDS EVEN ON THOSE WE THINK WE KNOW WELL 7HEN YOU

LISTEN TOMUSICYOUMAYHAVEHEARDMANY TIMESBEFORE INAVERY CRITICAL AND MICROSCOPIC WAY PERHAPS JUST FOCUSING ON ONE INDIVIDUAL SOUND WITHIN THE TRACKOR LISTENINGTOJUST THEREVERBOR JUST THEOVERALLBALANCEOF INSTRUMENTS YOUWILLOFTENHEARTHEMUSICINANEWLIGHTANDHEARTHINGSYOUNEVERREALLY NOTICEDBEFORE)AMNOTSAYINGTHATAPROFESSIONALLYRECORDEDANDMIXEDTRACK WILLNEVERHAVELARGEAMOUNTSOFREVERBBUTIFTHEYDOTHEYWILLGENERALLYBE USEDSPARINGLYONLYONONEOR TWOINSTRUMENTSPOSSIBLY INCLUDINGVOCALSOF COURSE

Reverb Controls )TISQUITEHARDTOGIVEANOVERVIEWOFCONTROLSONAhTYPICALvREVERBUNITINTHE SAMEWAYWEDIDFOR%1SANDCOMPRESSORSBECAUSETHEDIFFERENTMETHODSOF GENERATINGREVERBMAYWELLHAVEQUITEVARIEDPARAMETERSETS)CANTHINKOFONLY ASINGLECONTROLTHATEVERYDIFFERENTTYPEOFREVERBUNITHASINCOMMON

Wet/Dry Balance !NOTHERWAYINWHICHREVERBCANBEHELPFULISTOGIVEOURRECORDINGSdepthINA NEARFARWAY0ANNINGSOUNDSMOVESTHEMLEFTORRIGHTRELATIVETOOURLISTENING POSITIONANDAPPLYINGREVERBWILLPUTTHOSESOUNDSINTOANACOUSTICSPACEOUT SIDEOFOURHEADS5SINGREVERBCREATIVELYANDWELLCANADDAFRONTBACKDIMEN SIONTOTHISSPACEANDALLOWSMORESEPARATIONINOURMIX)FYOUIMAGINEEACH SOUND IN YOURMIX AS A PERSON AND YOUR TASK IS TO lT THEM ALL INTO A SMALL ROOMOBVIOUSLYIFTHEYAREALLPOSITIONEDSIDE BY SIDEINASTRAIGHTLINEACROSS THEROOMTHEYWILLBEMORECROWDEDANDCLOSETOGETHERTHANIFYOUSPLITTHEM UP INTO ROWSANDSPREAD THOSE ROWSACROSS THE LENGTHOF THE ROOMASWELLAS SPREADINGTHEMEMBERSOFEACHROWACROSSTHEWIDTHOFTHEROOM5SINGREVERB ALLOWSUSTOPUSHCERTAINSOUNDSMOREINTOTHEBACKGROUNDANDBRINGOTHERS

MORETOTHEFRONT INASIMPLEANDEFFECTIVEWAY7HATSMORE IFWEAREUSING REVERBINOURTRACKANYWAYTHENITDOESNTMEANUSINGANADDITIONALEFFECTBUT MERELYUSINGTHEONESWEALREADYHAVEINAPARTICULARWAY

)F YOU THINK ABOUT A REAL WORLD SITUATION FOR A MOMENT IT MIGHT HELP TO EXPLAINHOWTHEWETDRYBALANCEORSEPARATELEVELCONTROLSFORWETANDDRYLEV ELS CANHELPUSACHIEVETHISDEPTH)MAGINEYOURSELFATONEENDOFALONGTUN NELORATALLSTAIRWELL7EHAVEALLBEENINPLACESLIKETHATANDMAYBECLAPPED OUR HANDS OR SHOUTED SOMETHING TO HEAR THE LONG REVERB THAT FOLLOWS .OW IMAGINEYOURSELFSTANDINGATTHEENDOFTHISTUNNELWITHAFRIEND9OURFRIEND SHOUTS SOMETHING ANDHIS SHOUT CAUSES A LONG REVERB TAIL BUT lRST AND FORE MOSTYOUWOULDHAVEHEARDHISINITIALSHOUTANDTHENTHEREVERBWOULDHAVE FOLLOWED.OW IMAGINE YOUR FRIEND AT THE OTHER ENDOF THE LONG TUNNEL AND SHOUTINGTHESAMETHING4HIS TIMEYOUWOULDSTILLHEARHIS INITIALSHOUTAND THENTHEREVERBBUTTHESHOUTITSELFWOULDSEEMMUCHLOWERINVOLUMECOM PAREDTOTHEREVERB4HISPHENOMENONISSOMETHINGWEAUTOMATICALLYASSOCIATE WITHASOUNDBEINGDISTANT"ECAUSEOFTHISWECANUSETHEBALANCEBETWEENTHE WETANDDRYSIGNALSINAREVERBUNITTOGOSOMEWAYTOWARDSIMULATINGASENSE OFTHESOUNDBEINGSOMEWAYINTHEDISTANCE

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Reverb Decay Time 4HE DECAY TIME OF A REVERB CONTROLS THE IMPRESSION OF HOW BIG THE ACOUSTIC SPACEISANDWHATMATERIALSITISMADEOF"UTITISNTACONTROLTHATWEWOULD lND ON EVERY REVERB UNIT )N THE EARLY DAYS OF ARTIlCIAL REVERB THERE WAS NO reverb decay time CONTROL AS SUCH )F YOUWEREUSING SPRING REVERB YOU COULD CHANGETOADIFFERENTSIZEDSPRINGTOALTERTHEDECAYTIMEBUTTHATHARDLYCOUNTS ASACONTROL)TWASMUCHTHESAMEWITHPLATEREVERBSBECAUSETHEREVERBDECAY TIMEWASANINHERENTFEATUREOFAREVERBPLATEOFAPARTICULARPHYSICALSIZEAND THEONLYWAYTOCHANGETHEDECAYTIMEWASTOCHANGETOADIFFERENTPLATE!ND NOW AGAIN WITH CONVOLUTION REVERBS THERE ISNT ALWAYS A REVERB DECAY TIME CONTROL4HESAMPLEOFTHEROOMITSELFWILLHAVEAlXEDDECAYTIMESOTHEONLY WAYSTOPHYSICALLYALTERTHEDECAYTIMEOFTHESAMPLEISTOTIME STRETCHORCOM PRESS THE SAMPLE OR ALTER THE PLAYBACK pitch THATWOULD RESULT IN A LOSS OF QUALITYANDlDELITYTOTHEORIGINALROOM-ANYCONVOLUTIONREVERBPLUG INSGET

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Pre-Delay Time !SREVERBISBASICALLYAVERYLARGENUMBEROFINDIVIDUALECHOESARRIVINGATOUR EARSATDIFFERENTTIMESANDFROMDIFFERENTDIRECTIONS IF THESOUNDSOURCEWERE DIRECTLY IN FRONTOFUS AND THE ROOMWERE SUFlCIENTLY LARGEWEWOULD EXPECT THERETOBESOMEKINDOFDELAYBETWEENTHEORIGINALSOUNDANDTHEREVERBSTART ING3OUND TRAVELSAT ROUGHLY FEET METERS PER SECOND SO THE TIME

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ROTARY SPEAKER/LESLIE SIMULATIONS !ROTARYSPEAKEREFFECTISANEMULATIONOFAREAL WORLDELECTRO MECHANICALEFFECT THAT HAS SOME COMPLEX PROPERTIES )T ISMUCHMORE THAN SIMPLY APPLYING A SHORTDELAYTOANINPUTSIGNAL!CONVINCINGEMULATIONOFAROTARYSPEAKERALSO KNOWNASAh,ESLIEvAFTERITSINVENTOR$ONALD,ESLIE HASBEENSOUGHTAFTERFOR QUITE SOME TIME PARTLY BECAUSE A REAL ,ESLIE SPEAKER ISNT THEMOST PORTABLE THINGINTHEWORLD4HE,ESLIEISLARGEHEAVYANDCUMBERSOMEBUTFORMANY

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SOUNDALSOAPPEARSTOBEMOVINGFRONTTOBACK4HESAMEPRINCIPLEAPPLIESIN THAT THE CIRCULAR ROTATIONOF THE SPEAKERWOULDNEEDA SINEWAVEMODULATION TO CONVERT THAT TO A ONE DIMENSIONALMOVEMENT IN THIS INSTANCE FRONTBACK RATHER THAN LEFTRIGHT BUT THATMODULATIONWOULDHAVE TO ADJUST THE AMPLI TUDEOFTHESOUNDINSTEADOFTHEPANNINGPOSITION)TDOESNTREQUIREIN DEPTH KNOWLEDGEOFPHYSICSTOWORKOUTTHATSOUNDSGETQUIETERTHEFURTHERAWAYYOU GET 4HEREFORE WE NEED TO APPLY SOMEMODULATION TO THE AMPLITUDE OF THE SOUNDMAKING ITQUIETERWHENTHEhVIRTUALvSPEAKER ISAT THEBACKOF THECIR CLEFARTHESTFROMUSANDLOUDERWHENITISATTHEFRONTOFTHECIRCLE4HEACTUAL mUCTUATIONS IN AMPLITUDE CAUSED BY THIS EFFECT ALONE WOULD BEMINIMAL SO WENEED TO FACTOR IN THEDIRECTIONOF THESOUNDAT THEDIFFERENTPOINTS!GAIN CALLINGONEXPERIENCELETSCONSIDERAPERSONWHOISASHORTDISTANCEFROMUS FACING AWAY FROMUS AND IS SHOUTING INTO AMEGAPHONE )FWHILEHE CONTIN UED SHOUTING INTO THEMEGAPHONE THEN TURNED TO FACE US THE SOUNDWOULD GETLOUDEREVENTHOUGHTHEDISTANCEHADNTCHANGED4HISISALSOAFACTORTHAT ONLYSERVESTOINCREASETHECHANGESINAMPLITUDETHROUGHOUTTHEROTATIONOFTHE SPEAKER4HATSTHEAMPLITUDEMODULATIONORTREMOLO TAKENCAREOF .EXTWECONSIDERTHESPEEDOFTHESOUNDITSELF"ECAUSEOFSOMETHINGCALLEDTHE Doppler effectWHENANOBJECTEMITTINGSOUNDISMOVINGTOWARDUSTHEAPPAR ENTPITCHOFTHESOUNDINCREASESWHENITTRAVELSAWAYFROMUSTHEPITCHOFTHE SOUNDSEEMS TODECREASE!GAINWEDONT REALLYNEED TO LOOKDEEPLY INTO THE SCIENCEBEHINDITASWEHAVEALLHEARDTHISEFFECTWHENACARORMOTORBIKETRAV ELINGQUITE FAST PASSESUS AND THEPITCHOF THE SOUNDOF THE ENGINE SEEMS TO DROPASITPASSES4HISALSOHAPPENSWITHA,ESLIESPEAKER!STHESPEAKERROTATES IT ISALTERNATELYACCELERATINGTOWARDUSRAISINGTHEPITCH TRAVELINGACROSSOUR STEREOlELDPITCHSTATIC TRAVELINGAWAYFROMUSPITCHDESCENDING ANDTHEN TRAVELING ACROSS AGAIN PITCH STATIC /F COURSE THERE IS A SMOOTH TRANSITION BETWEENTHESEFOURSTATESASTHEMOTIONISCIRCULARRATHERTHANSQUAREBUTTHE ENDRESULTISACYCLICRISEANDFALLINPITCHWHICHISYOUGUESSEDITVIBRATO!ND ONCEAGAINWEWOULDUSEASINEWAVETOREPLICATETHETWO DIMENSIONALMOTION INTOAONE DIMENSIONALMODULATIONVALUE 4HEONEGOODTHINGHERE IS THATBECAUSEALL THREEOF THEATTRIBUTESSTEMFROM THESAMESOURCETHEROTATION THEYAREALLBEINGMODULATEDATEXACTLYTHESAME RATEONLYTHEPHASERELATIONSHIPISDIFFERENT7HENTHELEFTTORIGHTMOVEMENT ISMOMENTARILYSTATIONARYONTHELEFTSIDEOFTHECIRCLETHEFRONTTOBACKMOVE MENTWILLBEATITSGREATESTRATEANDTHEPITCHWILLBEDROPPINGATITSGREATESTRATE )NCONTRASTWHENTHEFRONTTOBACKMOVEMENTHASMOMENTARILYSTOPPEDATTHE BACKOFTHECIRCLETHEPITCHWILLALSOBESTATICBUTTHELEFTTORIGHTMOVEMENTWILL BEAT ITSHIGHEST RATE!SA RESULT THE FRONTBACKMODULATIONANDPITCHMODU LATIONWILL BE INPHASEWITH EACHOTHER HIGHEST AMPLITUDE ANDHIGHEST PITCH OCCURRINGATTHESAMETIME BUTTHELEFTRIGHTPANNINGISEXACTLYDEGREESOUT OFPHASEWITHTHAT)TCOMPLICATESMATTERSALITTLEBUTNOTTOOMUCH 4HESE THREE FACTORS TOGETHER CONTRIBUTE MUCH OF THE CHARACTER OF THE ,ESLIE SOUNDBUTTHEREARETWOSEPARATESPEAKERSTOCONSIDER%ACHSPEAKERROTATESIN THEOPPOSITEDIRECTIONONECLOCKWISEANDONEANTICLOCKWISE ANDATDIFFERENT

SPEEDS4HISWILL REQUIRE THEUSEOF TWODISTINCT SYSTEMS TOEMULATE CORRECTLY BUTBOTHOF THOSE SYSTEMSWOULDBE IDENTICAL FUNCTIONALLY JUSTWITHDIFFERENT ,&/SETTINGSANDDIFFERENTINPUTSIGNALS"OTHOFTHOSESIGNALSTHENNEEDTOBE COMBINEDBACKTOGIVETHElNISHED,ESLIESOUND/NCETHISISDONEYOUHAVE ONA VERY RUDIMENTARY LEVEL COMPLETED YOUR,ESLIE EMULATION 4HE REALITY IS OFCOURSEVERYDIFFERENTBECAUSETHEACTUALSPEAKERSTHEMSELVESWITHTHEIRDIF FERING FREQUENCY RESPONSES WILL TONALLY CHANGE THE INPUT SIGNAL4HE SAME IS TRUEOFTHEAMPLIlERDRIVINGTHESPEAKERSANDITISESPECIALLYTRUEOFTHEACTUAL PHYSICALCABINETTHEWHOLEASSEMBLYISIN4HESIZESHAPEANDMATERIALSUSED ALLHAVE THEIROWN INmUENCEON THE TONAL RESONANCESOF THECABINETAND THIS HASABEARINGONTHElNALSOUND9OUCOULDALSOCONSIDERTHEFACTTHATWITHIN THEPARTIALLYCLOSEDSYSTEMOFTHESPEAKERCABINETTHEREARELOTSOFSOUNDWAVES BOUNCING AROUND AND THEREFORE LOTS OF COMPLICATED PHASING ISSUES TO CON SIDERASWELL4HISISPROBABLYWHYITHASTAKENSOLONGFORDIGITALTECHNOLOGY TOEVENCOMECLOSE TOANAUTHENTIC,ESLIE SIMULATIONANDWHYEVEN THEBEST ,ESLIEEMULATIONSSTILLDONT SEEMTOCAPTURE THE FULLESSENCEOFWHATA,ESLIE CABINETISABOUT$ONTGETMEWRONGTHEYAREGOODTHEYAREdamn goodINFACT BUTTHEREISJUSTSOMETHINGMISSING)HAVEACTUALLYACHIEVEDWHAT)BELIEVEARE MYMOSTREALISTIC,ESLIESIMULATIONSBYTAKINGTHEOUTPUTOFMYROTARYSPEAKER PLUG IN AND FEEDING IT THROUGH A CONVOLUTION REVERB SET ON QUITE A SMALL hROOMvSETTINGJUSTTOPUTTHE,ESLIEEFFECTINTOAspaceRATHERTHANITEXISTINGIN AFULL WIDTHSTEREOIMAGE

"ECAUSEITISEMULATINGAVERYSIMPLEMECHANICALLYSPEAKING PHYSICALDEVICE THECONTROLSONA TYPICAL,ESLIEORROTARYSPEAKEREFFECTGENERALLYMIMICTHOSE ONAREAL,ESLIESPEAKERANDASSUCHARELIMITEDTOSPEEDCONTROLSFOREACHOF THE TWO SPEAKERS SELECTABLEBETWEENOFF SLOWAND FAST AND THENPOSSIBLYA CONTROL THAT AFFECTS THE ACCELERATION AND DETERMINES HOW QUICKLY THE CHANGE HAPPENS BETWEEN EACH OF THESE SPEED CHANGES )N A REAL ,ESLIE THE CHANGES DONTHAPPENINSTANTLYBECAUSEITTAKESTIMEFOREACHOFTHESPEAKERSTOGETUP TO SPEEDOR TO SLOW FROMONE SPEED TO A SLOWERONE 4HEREMAYBEOPTIONAL CONTROLS FOR drive level TO SIMULATE THE SOUND OF REALLY PUSHING THE AMPLIlER ANDSPEAKERHARDANDTOTHEBRINKOFDISTORTIONANDYOUMIGHTEVENlNDCON TROLSFORVIRTUALMICROPHONESWHICHALLOWYOUTOALTERTHEWIDTHOFTHEVIRTUAL STEREOMICROPHONESTOGIVEASTRONGERORAMORESUBTLEEFFECT

) AMSURE THEREWILLBE SMALL IMPROVEMENTSON THE,ESLIE SIMULATIONS IN THE FUTURE AND ) LOOK FORWARD TO THOSE BECAUSE ) REALLY DO THINK IT IS AN UNDER RATEDEFFECT4HEUSESONELECTRICORGANSAREEXTREMELYWELL DOCUMENTEDANDARE APARTOFMUSICALHISTORY%VENITSUSEONELECTRICPIANOSOTHERLIVEINSTRUMENTS ANDVOCALSISQUITEWELL ESTABLISHED"UTITCANBEUSEDONANYSOUND!DDING A,ESLIEEFFECTTOASYNTHPADANDCHOOSINGTHESLOWSPEEDSETTINGCANGIVEAN INCREDIBLY LUSH SOUND SIMILAR TO CHORUS SIMILAR TO mANGING OR PHASING BUT DIFFERENTSOMEHOW!DDINGA,ESLIETOASYNTHLEADSOUNDWITHTHEHIGHSPEED SETTINGCANREALLYHELPTOSOFTENTHEEDGESUPWHILESTILLRETAININGALOTOFCLAR ITYANDCUTINTHESOUND3OMETIMESLEADSOUNDSCANBEHARDTOMIXBECAUSE ONTHEONEHANDTHEYNEEDTOBEHEARDBUTONTHEOTHERYOUOFTENDONTWANT

THEMTOBEHARSHORABRASIVE"YUSINGA,ESLIEEFFECTYOUCANMAKETHESOUND DIFFERENTENOUGHFROMANYTHINGELSEINTHETRACKTHATITWILLSTANDOUTANYWAY WITHOUTYOUHAVINGTOTURNITINTOACHAINSAWOFASOUND

RING MODULATION )N#HAPTER WE LOOKED AT &- SYNTHESISWHICHUSES A COMBINATIONOF TWO WAVEFORMS TO CREATE VARIOUS sideband FREQUENCIES RELATED TO THE TWO ORIGINAL ONESUSED2INGMODULATIONUSESASIMILAR TECHNIQUEBUT THIS TIMEMODULAT ING THE AMPLITUDE OF ONE WAVEFORMWITH THE OTHER RATHER THANMODULATING THE FREQUENCY4HE RESULTOF THISMODULATION IS TWO FREQUENCIESONE THE SUM OF THE TWO INPUT FREQUENCIES ANDONE THEDIFFERENCEBETWEEN THE TWO )F FOR EXAMPLEWEHADAWAVEFORMOF(ZBEINGMODULATEDBYONEOF(ZTHE OUTPUTFROMTHERINGMODULATORWOULDBEONEWAVEFORMOF(ZANDONEOF (Z4HISMIGHTSEEMFAMILIARTOTHOSEOFYOUWITHAKEENEYEASBEINGTHE SAMEAS THEh# -vANDh# -vSIDEBAND FREQUENCIESPRODUCEDBY&-SYN THESIS4HEKEYDIFFERENCEISTHATWHILE&-SYNTHESISPRODUCESASERIESOFTHESE SIDEBANDFREQUENCIESRINGMODULATIONONLYPRODUCESTHETWOWEMENTIONED ANDTHEORIGINALTWOFREQUENCIESARENORMALLY NOTPRESENT

!SYOUMIGHTEXPECTTHERESULTSHAVEMUCHINCOMMONWITH&-SYNTHESISIN THAT THE OUTPUT OFTEN HASMETALLIC RINGING OVERTONES AND A GENERALLY INHAR MONICFEELTOIT"UTTHATSNOTTOSAYIThas toSOUNDTHATWAY)FTHETWOFREQUEN CIES ARE CAREFULLY CHOSEN THE RESULTING sum and difference OUTPUT FROM A RING

MODULATOR CANBEMORE hMUSICALv AND LESSHARSHBUT IT CERTAINLY ISNT SOME THING THAT IS EASILY CONTROLLABLE 3PEAKING OF THE CONTROLS THERE REALLY IS VERY LITTLE TO CONTROL )F THE RINGMODULATORHASAN INTERNALOSCILLATOR TOUSEAS THE MODULATION SOURCEYOUWILLHAVEA CONTROL TO SET THE FREQUENCYOF THATOSCIL LATORANDPERHAPSTHEPHASEOFIT ANDTHATSREALLYALLTHEREISTOIT4HEOTHER OPTIONISTOHAVEAMODULATIONSOURCEINPUTWHICHWOULDUSEADIFFERENTSIGNAL ASTHEMODULATIONSOURCE-OREOFTENTHANNOTTHESEDAYSTHATWOULDTAKETHE FORMOFASIDECHAIN INPUT IN THEPLUG IN4HEREAREOTHEROPTIONSTHAT INVOLVE HAVINGONECHANNELOFA STEREO INPUTAS THE carrierWAVEAND THEOTHERAS THE modulatorWAVE)THINKTHATTHESIDECHAININPUTISFARBETTERITALLOWSSTEREOSIG NALSTOBERINGMODULATEDANDISFAREASIERTOSETUP

2INGMODULATIONISAGREATEFFECT FORTHEMOREEXPERIMENTALPROGRAMMERBUT IT CERTAINLY ISNT SOMETHING ) OFTEN THINKOFUSING 4HERE IS PERHAPS ABETTER IMPLEMENTATIONOFRINGMODULATIONTOBEFOUND/NEOFTHEPROBLEMS)HAVE WITH IT IS THAT YOU CAN lND A REALLY GREAT SOUND BY ADJUSTING THEMODULATOR FREQUENCY WHILE HOLDING DOWN A CERTAIN NOTE BUT WHEN THAT NOTE CHANGES THERELATIONSHIPBETWEENTHECARRIERANDTHEMODULATORFREQUENCYCHANGESSO WHATEVERHARMONICSWEREBEING GENERATEDHAVENOW CHANGED )F THEPITCHOF THEMODULATORINSIDETHEPLUG INCOULDTRACK-)$)NOTESSOTHATONCEYOUHAD FOUNDAGOODPOSITIONFORITRELATIVETOANINPUTNOTETHElNALFREQUENCYOFTHE MODULATORCOULDTHENBEhPLAYEDvBYA-)$)SEQUENCETHATFORMEWOULDBE FARMOREUSEFUL ANDWOULDEXTEND THE SOUNDPALETTE FROMBEINGMOREABOUT METALLICANDCLANGINGSOUNDEFFECTSTOMOREOFASOUNDDESIGNTOOL

FREQUENCY SHIFTER !FREQUENCYSHIFTERDOESEXACTLYWHATITSNAMESUGGESTSITSHIFTSFREQUENCIES4HE UNIQUENESSOFTHESOUNDOFAFREQUENCYSHIFTERCOMESFROMTHEFACTTHATITSHIFTS ALLOFTHEDIFFERENTHARMONICSINASOUNDBYTHESAMENUMERICALAMOUNTRATHER THANBY THE SAME RATIO!S YOUPROBABLY REMEMBERHARMONIC FREQUENCIES ARE

WORKED OUT ASMULTIPLES OF A ROOT OR FUNDAMENTAL FREQUENCY ! FUNDAMENTAL FREQUENCYOF(ZWOULDHAVEHARMONICSAT(Z(Z(Z(Z AND SOON AND IFWEWERE TO INCREASE THAT FUNDAMENTAL FREQUENCY TO(Z THEHARMONICSERIESWOULDTHENCHANGETO(Z(Z(Z(ZAND SOON"UTIFWETOOKOURlRSTSEQUENCEANDRANTHATTHROUGHAFREQUENCYSHIFTER WITHASHIFTVALUEOF(ZTHERESULTINGSERIESWOULDENDUPAS(Z(Z (Z (Z (Z AND SO ON /N ITS OWN THIS WOULD PRODUCE A VERY INHARMONICSOUNDWHICHCOULDPOSSIBLYBEWHATYOUARE LOOKINGFOR/NTHE OTHERHANDTHEREAREVARIOUSWAYSINWHICHWECANUSETHISGENERATEDSOUND

)FYOU LOOKBACK TOWHATWESAIDABOUTPHASERSYOUMIGHT REMEMBER THATA PHASERWORKSUSINGCOMBlLTERINGANDASERIESOFEVENLYSPACEDNUMERICALLY SPEAKING NOTCHESINTHEFREQUENCYSPECTRUM7HATWEDESCRIBEDASAPOSSIBLE OUTPUTFROMAFREQUENCYSHIFTERISASERIESOFEVENLYSPACEDNUMERICALLYSPEAK ING hSPIKESvWECOULDUSEIFWESUBTRACTEDTHEMFROMTHEORIGINALSOUNDTO CREATEASIMILAREFFECT TOCOMBlLTERING0ERHAPSNOTUNEXPECTEDLY THEOUTPUT FROMAFREQUENCYSHIFTERcanSOUNDVERYMUCHLIKETHATFROMAPHASER)NMANY WAYS THOUGH FREQUENCYSHIFTERSARE LIKERINGMODULATIONESPECIALLYADEPTAT CREATINGMETALLICRESONATINGANDINHARMONICSOUNDSANDEFFECTS

SUMMARY !S ) STATED AT THE BEGINNING OF THIS CHAPTER TIME DOMAIN AND MODULATION EFFECTSAREMUCHMORELIKEFAIRYDUSTWESPRINKLEOVERTHESOUNDSINOURMIX (OPEFULLYAFTERREADINGTHISCHAPTERYOUHAVEAGOODIDEAOFWHATTHEYALLDO ANDWHYWEMIGHTWANTTOUSETHEM-OREIMPORTANTLY)HOPETHATYOUHAVE ANAPPRECIATIONOFWHYTHEYSHOULDBEUSEDINMODERATION)NGENERAL)LIKETO USEREVERBEFFECTSTOHELPGIVEASENSEOFFRONT TO BACKDEPTHINAMIXASWELLAS PROVIDINGSPECIlCMOREDRAMATICEFFECTSONCERTAINSOUNDS)USEDELAYEFFECTS MOSTLY TO PROVIDE ADDITIONAL RHYTHMIC INTEREST AND OCCASIONALLY AS resonators FORSPECIALEFFECTS

7HEN)USEMODULATIONEFFECTS)TRYTOMAKESURE)USETHEMSUBTLYANDDONT USE THEMOREDRAMATIC EFFECTSON TOOMANYDIFFERENT SOUNDSATONCE )F )DO THEYACTUALLYTENDTOLOSETHEIREFFECTASTHEYBECOMELOSTINASWOOSHINGAND SWIRLINGFOG#HORUSANDENSEMBLEEFFECTSARETHELEASTOBTRUSIVEINTHISRESPECT ANDmANGERANDPHASEREFFECTSARE THEMOSTOBTRUSIVE )HAVENOOBJECTION TO ANYOFTHEMANDINFACT)REALLYLIKETHEEFFECTAWELL PLACEDmANGERORPHASER CAN HAVE ) OFTEN USE mANGER OR PHASER EFFECTS ON THEWHOLEMIX OR AT LEAST SUBSTANTIALPARTSOF IT ASAMEANSOFBUILDING TENSIONCOMINGOUTOFADROP ANDTHEYCANBEREALLYEFFECTIVEASAlNALMEANSOFADDINGTHATlNALLIFT,IKESO MANYTHINGSHOWEVERIFYOUUSETHEMTOOMUCHORTOOOFTENTHEYSTARTTOLOSE ALITTLEBITOFTHATMAGIC

!SURPRISINGTHINGABOUTTHESEEFFECTSISTHEDIFFERENCEWHENYOUREMOVETHEM ALL !S AN EXPERIMENTWHEN YOU HAVE COMPLETED AMIX TRY BYPASSING ALL OF THEREVERBDELAYANDMODULATIONEFFECTSANDTHENLISTENTOHOWMUCHSMALLER

NARROWERANDSHALLOWERFRONTTOBACK THEMIXSOUNDS%VENINSOMEOFTHE CURRENT QUITE DRY SOUNDING PRODUCTION STYLES THERE IS STILL A LOT YOU CAN DO WITHSUBTLEREVERBANDDELAYEFFECTS THATGIVEDEPTHANDSEPARATIONWHILESTILL MAINTAININGAVERYUPFRONTANDDRYSOUND

)NTHENEXTCHAPTERWELOOKATSOMEMORECOMMONEFFECTSYOUMIGHTNEEDOR WANTTOUSEINYOURREMIXESBEFOREMOVINGONTOTHELASTCHAPTERINTHISSEC TIONWHEREWELOOKATTHEMASTERINGPROCESS