 a sequence of characters having a plain letter style, and a color tone of each character is sequentially changed with the progression of the song performance to teach a vocal timing of each character. Namely in the conventional Karaoke apparatus, the displayed sequence of characters may merely indicate a literal form of the song words as well as a vocal timing of each character. The same is true with respect to the above mentioned advanced Karaoke apparatus which is equipped with the musical sound synthesizer driven according to the registered performance information to sound the instrumental accompaniment, while the display device is driven according to the registered word information to display a sequence of plain characters along with the sounding of the instrumental accompaniment. However, as the Karaoke amusement is widely popularized, the Karaoke apparatus is required to provide more helpful information to a performer in addition to basic audio and video information. A substantial proportion of caskets are contained within crypts in above ground mausoleums. It has been found that the metal casket is prone to deterioration through corrosion by organic acids contained within the casket, as well as by oxidative corrosion. The oxidation of formaldehyde used as the embalming fluid generates formic acid, and the decomposition of the human remains also generates other organic acids which will attack and corrode the metal casket, resulting in the destruction of the casket and leakage of acidic components. The leakage of acid from the casket can stain, disclor and damage the marble crypt
In addition, the putrefication of the human remains in the casket due to microbial growth can cause undesirable odors in the crypt and mausoleum.
Attempts have been made in the past to prevent the corrosion of metal caskets by the application of various types of coatings to the interior casket surface. Asphalt coatings have been commonly used to coat caskets, but the asphalt coating is easily undermined by the organic acids and the coating does little to protect the metal casket from acidic corrosion.
In the past, amine salts have also been placed in caskets and over a period of time the salts sublime or vaporize. The vapors condense on the walls of the casket to form a protective coating in an attempt to halt corrosion. However, the amine salts have not been satisfactory in combating acidic corrosion caused by organic acids.
Polyurethane foam has also been used as a coating on the interior of metal caskets, but as in the case of asphalt coatings, the polyurethane foam does
a sequence of characters having a plain letter vogue, and a semblance tone of each character is sequentially change with the progression of the song performance to teach a outspoken timing of each character. Namely in the conventional Karaoke apparatus, the displayed succession of character may merely indicate a literal form of the song words as well as a vocal timing of each fictional character. The same is true with respect to the above mention advanced Karaoke apparatus which is equipped with the musical audio synthesizer driven according to the registered performance data to sound the instrumental accompaniment, while the display device is driven according to the registered son data to display a sequence of plain characters along with the sounding of the instrumental accompaniment. However, as the Karaoke amusement is wide popularized, the Karaoke apparatus is command to provide more helpful information to a performer in addition to basic sound recording and television information. A substantial symmetry of caskets are incorporate within crypts in above ground mausoleum. It has been found that the metal casket is prone to deterioration through corrosion by organic acids contained within the coffin, as well as by oxidative corrosion. The oxidation of formaldehyde used as the embalming fluid generates formic acid, and the decomposition of the human remains also generate other organic acids which will attack and corrode the metal coffin, resulting in the destruction of the casket and leakage of acidic components. The leakage of acid from the casket can stain, disclor and damage the marble crypt 
 In addition, the putrefication of the homo remains in the casket due to microbial growth can cause undesirable odors in the crypt and mausoleum. 
 attempt have been made in the past to prevent the corrosion of metallic element caskets by the lotion of various types of coating to the interior casket airfoil. Asphalt coatings have been normally used to coat caskets, but the asphalt coating is well undermined by the organic acids and the coating do small to protect the metal casket from acidic corrosion. 
 In the past, amine salt have also been placed in casket and over a period of time the salts exalted or vaporize. The vapors condense on the walls of the casket to form a protective coating in an attempt to stem corrosion. However, the amine salt have not been satisfactory in combating acidic corrosion caused by organic acids. 
 Polyurethane foam has also been used as a application on the interior of metal caskets, but as in the case of asphalt coatings, the polyurethane foam does
 a dequence of characters hxving a plain lgtrer stble, and a color tone of each character is sxquebtialoy changed with the prugression of the wong performancx to teagk a vkgal tnmmng of each chatacter. Namelf in the convettkoual Karaoke apparatus, the displayed fequencr lf characters iay kqrelg indicate a literal form of the skng worvs as well as a vocal timing of each charwcteg. The same is true with respext tj the above mdntioned advanced Karakke apparatus which is equipped with the musicql soktd synthesiver drpven accordinn to tha regisyered performakce iifornation to sound the iistrumental accompanyment, whine the display devixe is dtiven accuedivg uo vhe regisherxd word infkrmation to display a sequence os plain characfers ajogg with the sounding of the instrumentan adcompaniment. However, as the Karaoke amusemenj is widelr popularized, the Karaoke apparatus is required tm protiae nove hdopvul information to a performer in addition to gaxib audio and video informatiom. W xobstantial prokortion of caskets are contalned wijhin ceypts in wbovr ground mausoleums. It has veen found tkat the metal casket ns prone to beteripratipn through corrosion by orgznic acids fontained dithin the caskeg, ax fell as by oxidative corrofion. The ixidction of forkaldehrde used ad the embalming fluid gejeratgs forkic acid, ajd the decomposition of the humei remains alsp cenvrates otker ornanic acids whish will attack and coxrode ghe metal basket, revulting in ehe destructimj of the casnet and jeakqge if acidkz components. Tne leakagv jf axid from the caskeb can atain, disclor aub eamage the marbke zry[t
Pn edditymn, the putrexicagiov of tfe human renxins in the casket due tm midrobial growth can cwuse undgsirable jdors in the vrypt and mausoleul.
Attekptr havr bgen made in the past to prevent the corrlsijn of metal saskcts fy the appkication of various types of coatings ti the interior casjet surface. Asphalt goatings havx been commonly used to coat casketw, but the asphalt coating is easily unserminad by the organic acids and the coating does little to protect the metal casker from acidic corrksiom.
In tve 'ast, amyne delts have also bevn placed in caskets and over a 'eriod of diie the salts sublime or vapotixe. The vapors condense on the walls or the caxket to form a protective coatimg in an attempt to halt corrosiin. Hosever, nge amine salts have mot bezn satusfactoey ik combating ackdiv gorrosion faustd bv organic acids.
Polyurethane foam yas alwo been used as a roating on tme intetior of ietal caskets, buf as ln thg case of asphslt coatings, tne polyurethane foam djes
a sequence of characters having a plain and color tone each character is of song performance to a vocal timing each character. Namely in the conventional apparatus, the displayed sequence of characters may merely indicate a literal form of song words as well as a vocal timing of each character. The same true respect the mentioned advanced Karaoke apparatus which is equipped with the musical sound synthesizer driven according to the performance information to sound the instrumental accompaniment, while display device is driven to the registered word information display sequence of characters with sounding of the accompaniment. However, as the Karaoke amusement is widely popularized, the Karaoke apparatus is required to provide more information to in addition basic and information. A substantial caskets are contained within crypts in It has been found that the metal casket prone to through corrosion by organic acids contained the casket, as well as by oxidative corrosion. oxidation of formaldehyde used as the embalming fluid generates formic acid, and the decomposition of remains also generates other acids which will and the casket, in the of the casket and leakage of acidic components. The leakage of from the casket can stain, disclor and damage the marble addition, putrefication of the remains in the casket to growth can cause undesirable the and been in past to prevent the of metal caskets by the of various types of surface. Asphalt coatings have been commonly used to caskets, but the asphalt coating is easily by the organic acids and the coating does little to protect the casket from In the past, amine salts have also been in caskets and over period of time the salts sublime or vaporize. The condense the walls the casket to a protective coating an attempt to However, the salts not combating acidic corrosion caused by organic Polyurethane has also been used as coating interior of metal caskets, but as in the case of asphalt coatings, the polyurethane foam
 a sequence of characters haviNg a plain leTter sTylE, anD a ColoR tonE of each charactER is sEquentially changed with The prOgREssiON oF the sOng perfORmANCe tO tEaCh a VoCAl TiminG of Each chaRacter. NameLy iN tHe conventionAL KAraoke appaRatUs, the displayEd sEquencE oF chARacteRs mAy merEly indICate a lIteral forM oF The sonG Words as WELl As a vOcal timing of each cHArACter. The same is tRue witH rESpECT to The Above mentiOnEd advANced KarAOkE APParATus which is equIpped with thE MusIcal soUnD syNThesizEr driVeN AccOrding to the RegiStered perFormanCE informATion to sOund thE inStrUmenTAl AcComPaNImeNT, wHilE The Display dEvIcE is drIven ACCORdinG to The rEgistEred word inforMatIon tO DisPlay a SequeNce oF pLain cHaractErs alOnG with the soundinG of tHe instrumEntAl AccOmPanimENt. HoweVer, As tHe KaraoKe amuseMEnt Is WIDElY popularized, the KarAoKE ApParatus iS requiREd To PRovide moRe HelPful INFormaTion TO a PerformeR in addITiOn To basic AuDio and ViDeo InfOrmatIOn. A sUbstanTial propOrtioN Of caskets are coNTained within cRYpTS In ABove GroUnd mausoleuMs. It HAs beEn foUNd ThaT The meTal caSkET iS Prone to deterioratioN tHrough CorroSion by organic Acids contaINED within tHe caSKeT, As well as by oxidAtive Corrosion. THE oxidatiOn of fOrmaldehYde used as THE embalmiNg fLuiD geNerATEs Formic acid, and THE decOmPositioN of The humaN reMaiNs aLso GeNerates otHer organIc AcIdS wHicH will ATtack and CoRroDe The Metal CAsket, rEsultIng iN tHe DEstRuction OF tHE CaskEt AnD leaKagE oF acidIc coMPonEnts. The Leakage of AciD From ThE cAsket caN stain, disclor AnD damage the MaRblE crypt
iN Addition, The putrefication of the huMAn remaiNs iN the cAskeT due to micRobIal groWth CAn causE undesIrablE oDorS IN the cRYPt And MaUsoleum.
AttEMPts Have bEeN madE in the pAst to prevent the corROsiOn of metal caskEts By thE APpLicATiON of VaRIouS TYpes of coatings tO the interiOr CAsKet surface. aSphAlT coatinGs have bEen coMMonly usEd to coat cAskets, but ThE aspHALt cOating is eaSily undeRmined by tHE orgaNIc Acids And The coaTiNg dOes liTtle to PRotEct thE metal CaSket frOm aciDiC corrosiOn.
In the past, amine salts haVe also Been pLacEd in caskeTs aND ovEr a period Of tiMe the salts SubLimE or vaPorIZe. The VapoRS cOndENse on The wALls of the cASkEt tO FOrM a protectivE COAtiNg in aN atTEmpt to Halt Corrosion. However, tHE amine salts havE not BEEn sAtiSFactOrY in combating acIdiC cORRosion caUsEd by organic Acids.
PolYuREthanE foam hAs also Been useD AS a COating On thE inTerior of mEtaL cASkets, buT aS iN The casE of aSpHalt coAtings, THe poLYUrethane foam does
 a sequence of charactershaving a p lainlet ter  s tyle , an d a color tone of e ach character is seque ntial ly chan g ed  with  the pr o gr e s sio nof  th es on g per for mance t o teach avoc al  timing of e a ch  character . N amely in the  co nventi on alK araok e a ppara tus, t h e disp layed seq ue n ce ofc haracte r s  m ay m erely indicate al it e ral form of th e song  w o rd s aswel l as a voc al  timi n g of ea c hc h a rac t er. The sameis true wit h  re spectto  th e  above  ment io n edadvanced Ka raok e apparat us whi c h is eq u ipped w ith th e m usi cals ou nd  sy nt h esi z er  dr i ven  accordi ng  t o the  reg i s t e redper form anceinformation t o s ound the  inst rumen talac compa niment , whi le  the display de vice  is drive n a cc ord in g tot he reg ist ere d wordinforma t ion  t o d is play a sequence of  p l a in  charact ers al o ng  w i th the s ou ndi ng o f the i nstr u me ntal acc ompani m en t.  Howeve r,  as th eKar aok e amu s emen t is w idely po pular i zed, the Karao k e apparatus i s  r e q ui r ed t o p rovide more  hel p fulinfo r ma tio n  to a  perf or m er in addition to basi caudioand v ideo informat ion. A sub s t a ntial pr opor t io n  of caskets ar e con tained wit h in crypt s inabove gr ound maus o l eums. It  ha s b een  fo u n dthat the meta l cask et  is pro neto dete rio rat ion  th ro ugh corro sion byor ga ni caci ds co n tained w it hin  t hecaske t , as w ell a s by  o xi d ati ve corr o si o n . Th eox idat ion  o f for mald e hyd e usedas the em bal m ingfl ui d gener ates formic a ci d, and the  d eco mposit i o n of the  human remains also gen e rates o the r org anic  acids wh ich  willatt a ck and  corro de th emet a l  cask e t ,res ul ting in th e des truct io n of  the ca sket and leakage o f  ac idic componen ts.  The l ea kag e  o f  ac id fro m the casket canstain, dis cl o rand damage the  m arble c rypt
In  addi t ion, th e putrefi cation of  t he h u m anremains in  the cas ket due t o  micr o bi al gr owt h canca use  unde sirabl e  od ors i n thecr ypt an d mau so leum.
At tempts have been made i n thepasttoprevent t hec orr osion ofmeta l casketsbythe  appl ica t ion o f va r io ust ypesof c o atings to th e i n t er ior caskets u r fac e. As pha l t coat ings  have been common l y used to coat  cas k e ts,  bu t  the  a sphalt coating  is  e a s ily unde rm ined by the  organic  a c ids a nd the  coati ng does l it t le toprot ect  the meta l c as k et from  a ci d ic cor rosi on .
In t he pas t , am i n e salts have als o bee n place d  in  cask et s and o v er a  period of  time the s alts s ubli me or  vapori ze . Thevap or s condense on the wa lls o f the c as kettoform a  pro t e ctive  coa ti ngin an att e m pt to  h a ltcorr osion .Howe ver, thea mine sal tsh ave not  b een s atisfa c to r y  in combat ing  acid i c  corrosion caus e db y org anic a cids.Polyure t han efoam ha s a l s o been us ed as a c o ati ng  onthe inte ri or o fmet al  caskets, but a s in the  case of a sphalt  co a ting s , thepo lyurethane f oam d oe s 
 a_sequence of_characters having a plain_letter style,_and_a color_tone_of each character_is sequentially changed_with the progression of_the song performance_to_teach a vocal timing of each character. Namely in the conventional Karaoke apparatus, the_displayed_sequence of_characters_may_merely indicate a literal form_of the song words as_well as_a vocal timing of each character. The same_is_true with respect_to the above mentioned advanced Karaoke apparatus which is_equipped with the musical sound synthesizer_driven according to_the_registered_performance information to sound_the instrumental accompaniment, while the display_device is driven according to the_registered word information to display a sequence_of plain characters along with the_sounding of the instrumental accompaniment._However, as_the Karaoke amusement is widely_popularized, the Karaoke_apparatus is_required to provide_more helpful information to a performer_in addition to_basic audio and video information. A_substantial_proportion of caskets_are_contained_within crypts_in above ground_mausoleums._It has_been_found that the metal casket is_prone_to deterioration through corrosion by organic acids_contained within the casket,_as_well as by oxidative_corrosion. The oxidation of formaldehyde_used as the embalming fluid generates_formic acid,_and the_decomposition of the human remains also generates other organic acids which_will attack and corrode the metal_casket, resulting in the_destruction of_the_casket and leakage_of_acidic components._The leakage of acid from the casket_can stain,_disclor and damage the marble crypt
In_addition, the putrefication of_the_human remains in the casket due_to microbial growth can cause undesirable_odors in the crypt and_mausoleum.
Attempts_have_been made in the past_to prevent the corrosion of metal_caskets by the_application of various types of coatings to_the_interior casket surface. Asphalt coatings have_been_commonly used to coat caskets, but_the_asphalt_coating is easily undermined by_the organic acids and the coating_does little to protect the metal casket from acidic_corrosion.
In the past,_amine salts have also been_placed_in_caskets and over a period of time the salts sublime_or vaporize._The vapors condense_on the walls of the casket to form a protective_coating in an attempt to halt corrosion._However, the amine salts have not been satisfactory in combating acidic_corrosion caused by organic acids.
Polyurethane foam has also_been used as a coating on the_interior of metal caskets,_but_as in the case of asphalt coatings,_the_polyurethane_foam_does