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IntroductvoicecircuitWiththedevelopmentofsocietyandtechnology,themodernelectronicproductsdesignpaysgreatattentiontoproducttheeasyoperationaltype,themanmachinecontactsurfacecertainlytohavetobegood.Thesound,theimageandsoonmakethemostimportantmethodwhichassociateswiththehumanity,alsoismanifestedintheelectronicproductsdesign.Usesapronunciationchip,letstheproductopenthemouthtospeak,maygetupstrengthenedfunctionandsoonpropagandabrand,instructionuseruse,breakdownurgentprompt,entertainment,novelcausestheproductdesigntobepractical,toforestallopponentbyashowofstrengthenfeatstheenemybyasurpriseattack.Differentproductfunctionaldesignandmarketdemand,whendesignmustcorrectlyselectthedifferentpronunciationchiporthemoduleachievesthebestnaturalpriceratio.EngineermayfromfollowingseveralaspectsconsiderwhichkindoftypeselectsthepronunciationchipAfterfirst,thepronunciationcontenttranscribesthepronunciationchip,whetherthecontentdoeshavefrequentlytoreviseIfthepronunciationcontentfrequentlymustrevise,forexample,recordinggreetingcardproductdesignandsoontheelectronicmessagemachine,shouldusetheISDseriesortheAPRseriespronunciationrecordingandsendingoutelectriccircuit,thesetwokindofchipsallsupportnomatterwhatrecords,fallstheelectricitypronunciationcontentnottobeabletolose,some10second16minuteeachkindofdifferentchipmaysupplythechoice.Theacousticfidelityisbetter,mayapproachthemagnetictapeacousticfidelity.Ifafterthepronunciationcontentreadsindoesnotneedtorevise,mayconsiderusesOTPdisposablefevertowritethepronunciationelectriccircuitandtocoverthemembranepronunciationelectriccircuitSecond,howchoosesOTPperhapstheMASKpronunciationelectriccircuitHowthesetwocenterselects,thenmainlyreadstheorderformthequantity,thevarietyaswellasthedateofdelivery.AftertheOTPpronunciationelectriccircuitmustusespecialpurposeprogrammingfeverwritingtoburnintothepronunciationcontentedition,needsthePCmachinesupport.Thiskindofchipnotsubscribesthequantitylimit,apiecealsomaymanufacture,thedeliveryisquick.Peripherypartfew,partitionsimple,thepriceislower,atpresenthas10second/21second/42second/85second/,170second/,341secondandsoonthemanykindsofmodelstobepossibletoelecttobeallowedtodividemultistageapplication.Suitsmustfastpromotetheproduct,thebatchfew,thevarietyaremany,thepronunciationdoesnothavetomodifytheproductselects.Oneachkindofproductandsoonelectricalappliances,motorcycle,coalgasalarmapparatus,rentalcarmileagefaremeterhasobtainedthewidespreadapplication.Iftheorderformquantityisverybigabove20,000pieces,requestpriceverylowapplication,likeeachkindofelectronictoy,electronicprayingtoBuddhamachineandsoonproduct,thenshouldusecoversthemembraneMASKthepronunciationelectriccircuit.Atpresenthas3second360secondmanykindsofspecificationstosupplythechoice,maydivideintothemultistage.WhenMASKchiporderinghastosubscribethequantityandManDanliang,ifthrowsthesinglequantitynottobeabletoachieveforthefirsttimethefactorystipulationcompletelythesinglequantity,usuallyalsomustpay15003000Dollarlightcovertospendgeneralfactoryalltopledgethrowsfullstipulationquantityinayeartoreturnlightcovertospend.Theproductioncycleislonger,usualneed3545day.Throwsafterthelist,isunabletochange,theriskisbigger.Third,looksatpronunciationtranscribingthelengthMayseefromtheaboveintroduction,theISD/APRmonolithicpronunciationrecordingandsendingoutchiplongestrecordingtimeis16minutesthe4KHZsamplingrate.Inthisrecordingtime,usestheISD/APRchiptohavethebetternaturalpriceratio.FlowsrapidlyBMP5008multistagerecordingandsendingoutboardwhichthecompanynewlypromotes,usesthebrandnew32Ksamplingcircuitdesign,theacousticfidelitygood,maymake48minutemultistagerecordingandsendingout,alsothepriceislow,needsthemonolithicintegratedcircuitsupportnotinaddition,thesuggestionuse.Ifmakesalongertimethesoundrecordingtosurpassabove16minutes,abovechipsuperiorityisnotobvious,suggestedusesflowsrapidlycompanysMP3seriesgeneraldevelopmentboardandtheBSP60developmentboard,itsacousticfidelity,therecordinglength,theeasytooperateandthepriceandsoonhavethesuperiority,islongestmayachieveforseveraldozenshoursthesoundrecordings.Thesetwodevelopmentsboarddetailedintroductionseesthishandbookthread.Fourth,lookedtherequestthepronunciationreturnsputstheacousticfidelityThegeneralpronunciationreturnsputs,theISD/APRmonolithicpronunciationrecordingandsendingoutelectriccircuitandtheOTP/MASKchipshouldallbeabletobecompetent.Butregardingsomeacousticfidelityrequestspeciallyhighsituation,forinstancethedesignmedicinemodelheartandlungssystem,therequestclearlyreturnsfeltrelieved,thelungnormalsound,theunusualsound,thegeneralpronunciationchipacousticfidelitycouldnotachievethedesigneffect,shouldusetheMP3generaldevelopmentboard.Fifth,inthebasisproductdesignhasthemonolithicintegratedcircuitIfhasthemonolithicintegratedcircuit,theaboveintroducedthechipbasicallyallmayuse.Ifdoesnothave,thenonlycouldintheOTPchipandISD1810,1,110,1,420,2,560,inAPR9301,9600chooses.ISD4000andtheAPR6000serieschipallneedsthemonolithicintegratedcircuitsupport.MonolithicpronunciationrecordingandsendingoutelectriccircuitISD1110monolithicmultistagerecordingandsendingoutelectriccircuit,10second/6.4Ksampling,butkeymodulationrecordingandsendingout,5VpowersupplyISD1420monolithicmultistagerecordingandsendingoutelectriccircuit,20second/6.4Ksampling,butkeymodulationrecordingandsendingout,5VpowersupplyISD1810monolithic816secondmayadjustsinglestagepronunciationrecordingandsendingoutelectriccircuit,the3Vpowersupply,16feetDIPsealISD2532/40monolithicmultistagerecordingandsendingoutelectriccircuit,32second/8K,40second/6.4ksampling,butkeymodulationrecordingandsendingout,5VpowersupplyISD2560/120monolithicmultistagerecordingandsendingoutelectriccircuit,60second/8Ksampling,butkeymodulationrecordingandsendingout,5VpowersupplyISD336060second/8Kmultistagepronunciationrecordingandsendingoutelectriccircuit,theSPIconnection,needstheMCUcontrol,the3Vpowersupply,theTSOPsealISD40022minute/8Kmultistagepronunciationrecordingandsendingoutelectriccircuit,theSPIconnection,needstheMCUcontrol,the3VpowersupplyISD40034minute/8Kmultistagepronunciationrecordingandsendingoutelectriccircuit,theSPIconnection,needstheMCUcontrol,the3VpowersupplyISD40048minute/8Kmultistagepronunciationrecordingandsendingoutelectriccircuit,theSPIconnection,needstheMCUcontrol,the3VpowersupplyAPR6008themonolithicpronunciationrecordingandsendingoutelectriccircuit,theSPIconnection,needstheMCUcontrol.4K/5.6K/6.4K/8Ksamplingratesoftwarecontrollable,mayrecordandsendout48minute,thereliabilitywell,pricelow,thesourceofgoodsissteady.ButthebottomchirpisslightlybiggerthantheISDchipAPR6016themonolithicpronunciationrecordingandsendingoutelectriccircuit,theSPIconnection,needstheMCUcontrol.4K/5.6K/6.4K/8Ksamplingratesoftwarecontrollable,mayrecordandsendout48minute,thereliabilitywell,pricelow,thesourceofgoodsissteady.ButthebottomchirpisslightlybiggerthantheISDchipAPI8108A10second/8sectionofOTPprogrammablepronunciationelectriccircuit,pricelow,theperipheryelectriccircuitissuccinct.Partitionssimply,thedeliveryisquick.Doesnothavesubscribesthequantitylimit.16feetDIP/SOPseal,3V6VpowersupplyAPI840N40second/31sectionofOTPprogrammablepronunciationelectriccircuit,pricelow,theperipheryelectriccircuitissuccinct.Partitionssimply,thedeliveryisquick.Doesnothavesubscribesthequantitylimit.20feetDIP/SOPseal,3V6VpowersupplyAP89021/04221second/42second/8sectionof/31sectionofOTPprogrammablepronunciationelectriccircuit,pricelow,theperipheryelectriccircuitissuccinct.Partitionssimply,thedeliveryisquick.Doesnothavesubscribesthequantitylimit.16feet/20footDIP/SOPseal,the2.4V3.6Vpowersupply,thebasepinandAPI8108A/840NbAP89341/170/085341second/,170second/85second/,256sectionofOTPprogrammablepronunciationelectriccircuit,pricelow,theperipheryelectriccircuitissuccinct.Partitionssimply,thedeliveryisquick.Doesnothavesubscribesthequantitylimit.HasthehighacousticfidelitypatternPCM/theordinaryacousticfidelityADPCMtwokindofacousticfidelitytobepossibletoelect.Thepressedkey,theMCUserialmouthcontrol/parallelmouthcontrolmanykindsofwaystriggerthewaytobepossibletoelect.24feetDIPseal,2.4V3.6Vpowersupply.TheOTPpronunciationchipintroducedandmakestheflowonSeptember14,2005ThemanufactureusesintheOTPpronunciationelectriccircuitsounddocument,whentranscribesthenewsoundcertainlymustchoosethesingletrackpattern,thesamplingfrequencyactsaccordingtothepronunciationchipmodelwhichyoursoundlengthandusestodecide,samplingfrequencyhigher,thesoundacousticfidelityisbetter,butcansavethepronunciationlonggoespastshort.ThegeneralOTPpronunciationchipsays10second,21second,42secondsforexampleAPI8108,
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