Cd-4 an Introduction
Quadradisc
Technics JVCI ItCil by Panasonic HANDBOOK!
A discrete point of view/ about the quadraphonic evolution
® 6060B PnnlOCf in Japan It is a decision that should be made as quickly as possible for the benefit of PAGES 15- 16 It's time to producer, retailer and "I've already chosen." consumer alike. A decision I/I/here Some choice words from that will inevitably deter people who already know choose again. mine the future course of high fidelity sound it's at. To the audio industry's When it inevitably came reproduction. great credit, critical time to choose a single | PAGES 3 5 choices made during the industry method of That's basically why we've Just (or the record. astonishing evolution of producing a stereo disc, put this book together. high fidelity sound have the system chosen We'd like you, the concern A quick look at the disc from always been made using represented the greatest ed individual who'll be Thomas A. to present day uncompromised accuracy possibility for utmost directly affected by that of reproduction and accuracy and flexibility | PAGE 17 decision, to fully under | PAGES 6 9 greatest creative flexibility through two totally separ stand what we believe that The CD-4 roster. as the final standards of ate channels with the choice must be: the CD-4 The quadraphonic multiple The people who make the judgement. The first lowest crosstalk of Compatible Discrete choice game. equipment you'll use saleable home equipment, information between them. 4-channel disc system— The quad disc systems and for instance, was big and Once that decision was the "Quadradisc." Why? how they basically work bulky—a difficult marketing made, "stereo" soon Because Quadradisc is f 'PAGES 18-20 problem, to say (he least. became a household word the only genuine 4-channel The sound on CD-4. But that was the only way everywhere. disc system. Because no | PAGES 10 ^-11 Quadradisc artists the industry knew how to other system offers the provide uncompromised Will the real 4-channel and albums Now quadraphonic sound pure accuracy ol repro state-of-the-art accuracy disc please stand up? has truly come of age. duction and vast creative and greatest creative A closer look at the CD-4 Hardware production and flexibility of Quadradisc. f— PAGES 21 -22 flexibility-so big and sales are riding a con And it's just as simple as Quadradisc bulky it was. Coming to terms with sistently increasing sales that. quadraphonic. curve. Quadraphonic | PAGE 12 software releases and A glossary ot quadraphonic sales are paralleling that We invite you to step into Getting hooked on CD-4. terminology curve. New technological the world of the CD-4 What you need and how It's advances are occurring Quadradisc. Read about it, connected fmmm> PAGES 23 24 almost daily. learn about it. listen to it. Then critically compare it Q & A X4. to any of the other pro | PAGE 13 The time has come once Most commonly asked ques posed systems. more for the sound CD-4 is in the air. tions and answers about the industry to make another A bit about quadraphonic FM 4-channel situation evolutionary decision—to It history means anything what quadraphonic disc at all, Quadradisc will f PAGE 14 | PAGE 25 system should its combined become the key that opens technological and market up the next great dimen Suggested speaker More about CD-4. ing efforts be directed? sion in sound. placement for CD-4 Where to get the latest listening. information O 0
gear equal to the task. The pressed into each wall of its ol a musical dimension that Like any developing thing. "LP" ushered in the era of liny grooves, was a great only the alliance of artistry Edison's amazing little "high fidelity." new tool for creative tech and technology could have cylinder was destined lo go The 45 RPM single play nician and artist alike. Multi fostered Just for the through a lot of changes. "doughnut" made its channel recording techniques First it was flattened into a Not even the fertile and entrance in the early fifties, provided far greater accuracy Today, another dimensional disc made ot wax This visionary mind ot Thomas and hundreds of musical and depth in the final 2-chan word has burst into the world record. Alva Edison could have provided a much easier re performers rose to star nel master. New disc raw ol sound. 'Quadraphonic." cording medium to work with, imagined the full scope of dom or melted into ob materials and pressing tech 4-channel sound. Sound that and eliminated much of the what he'd started when he scurity on its revolutions. niques were developed that surrounds. Sound that lifts background noise inherent in first captured sound on a tiny But the next real milestone increased durability, expand the listener up and drops the cylinder. Wax soon gave tin foil cylinder. In less than in the art of sound re ed frequency response and him right in the middle of way to the durability ot a single cnnlury. that initial production was the crea assured the kind ol complete things Sound with a whole shellac, and the 78 RPM permanent record" of tion of a thing called channel separation neces new experience of involve record Grandma used to play sound reached the cars of stereo". Up until then, sary for each speaker to ment. Sound that many ex on her windup was born the world and changed the everything was recorded on reproduce a proper sound perts believe is a greater life style ot its people. It a single track and played field. FM stations rapidly advancement over stereo became the sound of an Then came microgroove Now back through a single adapted to stereo multiplex than stereo was over ever-expanding industry an entire symphony could be channel—just as though broadcasting—a system in monaural. from which millions make recorded on one disc with you had only one oar But which two separate chan their living. The sound of far bettor fidelity than ever with the development of nels are sent out on the But there was an intrinsic the rich gift ot music and before. Equipment manu multi-track tape equipment, carrier and sub-carrier of a problem with quadraphonic entertainment we find at facturers quickly created sound was no longer limit radio wave Equipment sound reproduction. With our fingertips today mechanical and electronic ed by the unavoidable manufacturers once again tape, everything was easy. flatness of monaural re rose to the occasion, and a Simply record four separate production The ability to whole range of home gear channels on the tape, and record and reproduce 2- designed to take full fidelity play It back through four channel source material advantage of the higher separate channels—Ihe raised the curtain on an quality source material soon discrete recording process immensely wider stago of appeared on the shelves of now being used on quadra musical realism and the local hi-fi store. phonic tapes and cartridges. creativity. After a few years of learning But what about the prime what this new tool could do. vehicle of sound for the Yet stereo sound didn't make the technician and the artist home listener—the record? its big impact until a stereo formed a creative alliance There were only two walls on disc system was standard that turned on the world to a the groove, and quadra ized. The "stereo LP", with two-earod era of electronic phonic sound demanded four a totally separate channel imagination. It was the birth channels of information. 0 O
The lirsl and simplest solu full efforts behind the mas tion was to take tour chan sive research and develop nels ot recorded material, ment program it takes to meet that kind of challenge. The quadraphonic scramble it in a predictable pattern Into two channels, Using compatibility (ability to and approach to 4-channel then unscramble it Into four perform equally as well on sound reproduction. And stereo equipment with ihe multiple choiceeac h has certain advantages channels again with special electronic circuitry in the equivalent durability ol a Whatever initials you and disadvantages. playback equipment. This stereo record) and christen them with, there are But before any valid discreteness {the maximum game. basically only two quadra comparison can be made, a "matrix" method worked to a degree. The enhancement separation of Information on phonic disc systems on the firm understanding of the it provided to otherwise each of the four channels)as market—matrix and discrete. basic techniques of each straight stereo source their basic standards of Matrix systems may be SQ, system is an absolute must. material was clearly audible, performance evaluation, they QS, or in some other form. We offer the following and as a stereo enhancer, developed the revolutionary The only discrete system is : capsulized descriptions and matrix 4-channel reproduc CD-4 "Quadradisc " CD-4 CD-4. detailed illustrations towards tion should provide the home means Compatibility and Each has its own philosophy that end. listener with a lot of musical Discreteness on all 4 chan pleasure in the future. nels. The first and only The 4-2-4 Matrix system But even with the best quadraphonic system that Mixed sound after inter combines uncompromised electronic matrix unscram- change over each channel blers ever devised, some accuracy of reproduction and unlimited creative flexi Four channels ol discrete thing was always lost in the Information are mixed (encoded) 4-2-4 translation. The result bility on a disc. Now it's Into two channels, ihon unmixed (decoded) into tour-channels was loss of the defined inevitable. during playback. Note ihe "lane changing" ot information thai separation necessary for Recording Encoding Matrix Record Decoding Playback ineviiably occurs during the 4 Channel. 2 Channels A Channels 4-2-4 process. accurate reproduction ol the The sound of the future will 4-channel master tape. The have four sides. CD-4 only real solution was to welcomes you to all of them, The 4-4-4 Discrete System find a way to put lour totally isolated, complelely sepa Pure and unmixed sound rate channels on an LP disc. from start to finish. Somehow. By recording the sum ot front and rear channels in the audible region and the dilforence between Iron! and rear channels as modulated FM signals in the The idea captured the fancy 20 - 45 kHz region, tour discrete channels can bo maintained ol a team of Japanese Recording Modulating CD-4 fleco'd Demodulaimg Playbaefc Irom master tape to loud engineers. Unable to resist 4-Channels 4 Channels A Channels speakers—yet remain tully compatible with mono or stereo the challenge, they put their playback equipment. O
The Malrix System four discrete tracks of the discrote channels are The Discrete System on better records. But why, signals up in the 20-45,000 In theory, the matrix system original master lape. mixed together, there is The discrete approach to the they reasoned, must that be Hz region? That way. the appears to be the simplest no known way to recover quadraphonic disc repre the uppor limit? Available resulting disc would bo fully and most logical approach to Sounds easy enough. No them exactly as they were sented an entirely different techniques permitted compatible with existing the quadraphonic disc. Just major changes necessary in What happens during the point of view right from the pressing up to 45.000 stereo equipment, yet provide take lour separate channels record material, cutting and "4-2-4" process is a blend beginning. Unwilling to Hertz on the groove wall four totally discrete channels ot information, electronically pressing techniques, or FM ing of information between accept the limitations of Cartridge technology was of information with the proper scramble them together in a broadcasting. Just some channels, sometimes to the existing technology, discrete- such that a cartridge could playback equipment. Since the predetermined pattern or extra electronic circuitry, four point where some channels devoted engineers recogniz be produced that would two signals are so far apart matrix, and put this 2-chan speakers, and you were becomo nearly indistinguish ed the pure necessity of accurately track at such in the frequency spectrum. nel matrix on a standard ready for the quadraphonic able Irom others. This four completely separate frequencies and higher. Ihe possibility of interference sloroo disc. Then all you record. mingling ol inlormation is channels on a disc—and would be eliminated. had to do was develop a called "crosstalk", and the then set out to produce one. Then why not record the sum device that could decode But one problem—and result is varying degrees of of front and rear channels In Then all that was needed was that matrix during playback apparently an unsolvable separation loss. First, they looked at the the normal audible region some good FM demodulation and restore the sound as one—flaws the matrix theory. signal being put on the and the difference between circuitry in the playback closely as possible to the Once those four original standard 45-45 stereo record front and rear channels as equipment—the kind that's groove—up to 18.000 Hertz ultrasonic modulated FM
CD-4 Recording and Playback Processes Source Recording Proceaa CD-4 Record Unfortunately, even the bost Modulation matrix decoders with so phisticated phase shift and logic Circuitry can't prevent crosstalk, nor can they provide the kind ot channel separation we've come to Rocordmg Ericooing Mat"« Record Decoding, with Playback expect from stereo. A 4 Channel* 2 Channel* Logic Circuitry 4 Channels decent stereo system has That's very close to being standard stereo records. 2-channel Playback 4-channel Pluyback channel separation of around monaural sound, and far less Anyone who's heard their CD -4 Rcf or a CD-4 i.-.. - • 20-25 dB. But unless your than necessary for accept favorite stereo LP played Demodulating matrix quadraphonic home able reproduction of the through a good matrix equipment has full logic quadraphonic sound fields system will testify to that. For circuitry (and less than 20% portrayed on 4-channel that reason alone, it's an ot the products made today masters. advantage to have matrix do), channel separation can Where tho matrix system circuitry in your quadraphonic drop to as low as 3 dB during really shines, however, is in playback equipment. the matrix decoding process. its ability to enhance fa +L,H«U zMmjf
tU tUrjtV -U)_u
U +U -L |R# +Bal + (B) -B»)_„r been used in FM stereo the unlimited creative free multiplexing for years—and dom afforded through the a stylus capable of deliver discrete channel medium— M/ill the real 4-channel ing the ultrasonic frequency and the listener would be response required. able to hear everything thai creative freedom had to offer with absolute accuracy—all disc please stand up? Utilizing this new concept, the artist, engineer and In an amazing new disc. A lot ol new developments been accomplished with the instance, was to provide the record producer would for had to take placo betore the uncompromising concern consumer with a product that the first time be able to use The result was Quadradisc. CD-4 discrete Quadradisc for accuracy and artistic had at least equivalent process could become a freedom that has been the durability and performance viable concept in the quadra very foundation ot the life ol its stereo counterpart. phonic marketplace. A discrete disc philosophy. Record companies soon came tribute to today's audio up with new materials that technology, all of those nec One of the basic require were significantly harder with essary developments have ments of the Quadradisc, for lower noise characteristics
Tho Quadraphonic Sound Quadradisc Field Effects A clear look at the typo ol sound Some illustrations of me effect iioxibiiily and accuracy possible fields created by discrete and only with Quadradisc. matrix systems. Diagram A represents the exact sound field (a) A direct sound may bo (n) "Panning" (Ihe ability lo produced by Ihe original 4- assigned to a single chennt move tho location ol a sound channol master tape. Diagram while the remaining three within the sound field) Is B shows tho crosstalk inevitable may bo usod lor ils natural possible In any direction— in a matrix system. ambience. Since crosstalk even overhead. Absence of is absent in the discrete crosstalk makes Ihoso system, the etfecl is totally movements as clear and A Discroto Quadraphonic Sound accurate. precise as the original Field 4-channel master tape
A Matrix Quadraphonic Sound (c) Tho "stago-hall" relation Field ship— particularly important (d) A soloisl can be placed In in classical music—remains the center ol the room, pure and uncolored because while four totally separate of discreteness. The orche instruments or groups of stra always remains up Iront, instruments appear in each while rear speakers provide corner—a unique discroto necessary natural ambience. listening experience. than ever before possible. the quadradisc—and beyond. quality advancement that will This new Quadradisc A whole new shape in styli— eventually spill over Into compound actually adds to the Shibata type—was con stereo products. Demodula- Getting hooked on performance longevity up to ceived and perfected. lion systems were designed 50% and will soon be used This new super-stylus meant that deliver four discrete for CD-4 disc reproduction, sonic diamond that really for producing top quality greatly increased frequency channels of sound equivalent CD-4. preferably with the Shibata sparkles I" stereo records. response and significantly in separation to some of the or equivalent stylus. Now add Getting hooked on CD-4 is a Several cartridge manufac decreased record wear. lines! stereo recordings— a CD-4 demodulator, ex II you haven't already ex lot easier than it may sound. turers designed and now Extra-precision cutting, without adding noise or color ternally or built into Ihe perienced the indescribable produce fine ultra-broadband mastering and pressing ation of Its own to the signal. Begin with a basic 4-channel turntable or quadraphonic surround of sound provided cartridges fully capable of techniques were required playback system—a good receiver. by the CD-4 Quadradisc, we reaching the upper limits Of and implemented—another turntable, a 4-channel can only suggest that you ask receiver (or amplifier), and Now pick out some ol your your favorite hi-fi dealer Ffonlviow ol *ly four speakers closely favorite musical artists from to demonstrate it to you, If matched in efficiency that Ihe evergrowing Quadradisc his equipment ts properly please your listening list Then take them home, arranged, it won't take long SHIBATA Myitis preferences. Add to the listen to them, and as one to convince you thai we're turntable one of the many Quadradisc reviewer so now living in the year of excellent cartridges designed graphically slated, hear "a 19CD-4.
A new shape in styli that means 4-cfiannol Receive greater wall area contact and The ellecl of (racking lorce (2 The effect ol tracking force (2 CD-4 System Combinations ultra-sonic frequency response— grams) on a disc using a SHI grams) on a disc using a The possiblo hardware combinations yet with less wear force on Ihe BATA stylus. conventional oiiiptlcal stylus. that let you hoar the full record than an elliptical stylus. audio dynamics ol the Quadradisc. Other styli with Iho same Shibata slyius effect ho«o boen de veloped Til 1 H'.ltlll' CO-4 Demodulator
Now the CD-4 Quadradisc is record companies are matrix circuits. the potent force it deserves producing their top talent on to be in the audio market CD-4 Quadradiscs. Will the real—and only— place. Artists and producers More and more hardware 4-channel disc please 4-channel receiver with external demodulator. stand up? --! ha I-I . ••; Receiver with built-in who've used the system extol manufacturers are including Turntable CD-* Demodulator its virtues and proclaim it a CO-4 demodulation circuitry creative tool destined to in their 4-channel products, Thank you. Quadradisc. spawn new vistas of musical less and less ar© providing involvement. More and more Ihe more cosily full logic 4-channel receiver with built-in demodulator.
Turntable with built-in CD-4 Demodulator 4-channel Receiver
4-channel receiver with turntable containing built-in demodulator. of quadraphonic software and the increasing sales ol CD-4 is in the air.quadraphoni c hardware will Suggested speaker assure him of material to play As it was during (ho Initial himself to the expenditure and an adequately largo on a sofa which is against development of stereo, the and format alterations audience to listen to it a wall, making il impossible FM broadcasting medium is required to make Ihe placement for to move tho speakers in lagging behind tho rost ot changeover to 4-channel Other questions, however, back of you. In this case if industry in its commitment transmission, he must be still remain unanswered—but you simply put the speakers to 4-channel. This is not to totally satisfied with tho not for long. A long series of CD-4 listening. against the wall on each fault the FM broadcasters, answers to some very comparative tests using the Your room furnishings were stand or mounting it on the side ot the couch, you will however. To the contrary, it important questions For discrete disc and all of the be literally listening to the probably arranged before wall. is prudent policy on their instance, will there be newly developed discrete 4- you joined the ranks of back of the speaker. This is part. enough quadraphonic source channel transmitting systems quad high fidelity music The first step is to decide hardly ideal. Hanging the material to Ml his huge is in its final stages. It is felt listeners. Here are some where you will sit for your speakers up high toward the The reasons are simple appetite? by most broadcasters that tips and insight to get the most serious listening— ceiling or putting them at the when looked at through the once the results of this test What will the standard most from your new listen perhaps a favorite chair or extreme lelt and right with perspective of the station are fully compiled, an FCC quadraphonic disc process ing experience. Firsl sofa. Then locate the front a slight angle will Improve owners and operators. decision on the standard be? What kind ol equipment romomber that each set-up speakers directly across the depth of sound. Although some stations method of quadraphonic will he need to assuro good is as unique and personal from tho listening sofa just utilize tape source material, broadcasting would be less quality quadraphonic trans as the individuals who as you would il the system Although quad requires a most FM programming is than a year away mission and how exponsive listen to it. Don't be afraid woro only a stereo. Now place little more attention to derived from disc. That is it? Will there be enough to experiment. Moving a the rear speakers in back speaker placement than means the purchase and One final observation. It is people in his listening speaker toward a corner of you if possible, remember stereo, the end listening installation ol special significant to note that III audience who have the increases the bass, just as in ing to keep the rear left on result will be a much larger quadraphonic broadcasting systems being tested are proper 4-channel recoiving stereo. II you hear too much the same side as the front listening area than you can equipment designed to discrete, using CO-4 Quadra- equipment to make this a bass for your taste move the left. hope for from stereo. utilize the source material 7 discs and discrete 4-channel profitably wise venture speaker away from the available on quadraphonic tape as the prime source corner, or get it up off the discs. material. It often occurs that the Some of these questions lloor by placing it on the desired listening seats are But before the FM broad have already boon answered. That should tell you some caster is willing to commit The rapidly expanding library thing Is in the air.
The Discrete Broadcasting System Flo- (1) shows tho sloroo FM Fig. (2] Illustrates the pro method ol b'oadcasllng used posed discrete quadraphonic today, with the main base signal broadcasting system. Hero the carrying the sum ot (ell and right main signal carries the sum ol channels, and the subcarrler all channels (mono) while an providing the di'foronco botwoen "in phase" subcarner provides iet and right chonnois. This standard stereo reproduction method allows tor two discroto A second subcarner and B channels ot stereo in formation "quadrature" subcarrier deliver and full monaural signal as well ihe remaining information nocdod The ideal location of speakers In this configuration the rear For a typical living roorruOimng to broadcast discrete 4-channei and listeners Tne serious speakers may be placed slightly room combinations in contempo information and reproduce it listener may insisi on being at above Ihe listeners and mourned rary home*, this arrangement exactly as it appears on the lap* the center, even il furniture must on ihe wall 'or excellent may serve to Illustrate an idea or Quadradisc source material be rearranged. coverage ol Ihe listening area. that will make an effective quad at the station II Ihe speaker* nave narrow environment dispersion, angle them slightly to provide >or adequate coverage Jac Holzman CD-4, he knows what he's Richard Perry talking about. "I've already chosen." "I think I can sofoly say I've boon involved with virtually Advocates ol the CD-4 flfw/o Moitleiieyro Henry Mancini every kind of music that's Compatible Discrete 4-Chan being produced today. The nel Disc are an unusually en more we get into four-channel thusiastic bunch Because recording, four-channel mix once anyone involved with ing, and creating special ef the art ot sound reproduc fects, the more we want the tion—be it artist, producer, most faithful reproduction ot engineer or industry leader- "Our commitment to CD-4 a man who knows our efforts. I'm confident becomes involved with CD-4. was the result ol almost two when I say lhat CD-4 Is the avid enthusiasm tor its years of exhaustive research what he's talking truest reproduction there is. uncompromised sonic ac by the Warner/Eioktra/ about talks about "I'm concerned with the total curacy and unlimited creative "4 h- i in vans Quadraphonic the new sound Atlantic engineering team. CD-4"- musical environment I create flexibility is a natural result. freedom? Involved was a scrupulously I want my music to be as "Quad shouldn't be com Richard Perry Is one of the "The fact is that 4-channel detailed evaluation of all exciting visually as It Is pared to stereo.'says main men in the music Listen to what a tew of this sound has opened up a new competing quad systems. musically. The only way to Mancini. it's a whole new business today. Not only is growing group of CD-4 world of creativity for the Only then did we make our achieve this potential today listening experience, a he the brilliant independent devotees have to say about composer/arranger/producer. decision." says Jac is to do the disc in CD-4. real wrap around sound. producer tor Ringo Starr, the discrete disc Once you We now have the freedom to Holzman, Senior Vice One of the highest moments Actually, it's an extension Carly Simon, Barbra do. you won't find it difficult surround the listener with President. Warner Com I've ever experienced in a into the home of the new Streisand, Harry Nilsson and to understand why CD-4 has any sound environment our munications and Chairman studio was the first time I techniques that have boon Ella Fitzgerald, he's also a become the overwhelming imaginations can conceive Quadraphonic Planning heard my work back In four- developed lor wido-scroon twlco-named producer ol tho choice of professionals who Tho freedom to locate a Group of the Warner/Elektra/ channel. What I hoard really movies, mixed media shows year with 10 gold albums won't accept anything less sound anywhere within tho Atlantic Labels. made me believe that CD-4 and the new environments and 5 gold singles to his than the very best in sound environment. And the free "Why CD-4? The WEA labels is the only way to go." in which the listener is com name. In other words, when reproduction dom to manipulate and movo are blessed with an awesome pletely immersed in sound. Richard Perry talks about sound in any direction. roster of talent. Frank It's amazing what it docs for But these new freedoms Sinatra Carly Simon. any kind of music, from or compromise. "And. public gets a fair deal, too can onty exist—and be Gordon Lightfoot. Aretha Mozart to Sousa to Jazz. I they'll settle for nothing loss With CD-4. the record utilized, if the final product Franklin. have my own system in my "Our software efforts, buyer—with his quality can bo faithfully reproduced billiard room In Malibu with The Doobie Brothers. Bread. when added to comparably equipment—doesn't have to on disc without any limita four speakers mounted in Deep Purple. Alice Cooper. vigorous thrusls by RCA and settle for a disc that is less tions. Of tho several quadra corners. With Sousa in quad, Mystic Moods. Seals and other important CD-4 record discrete* than the quad tape phonic disc formats on the the bold lines of the writing Crofts. Judy Collins. ing companies, provides he plays over his moro market, in my opinion, only and the bright colors of the Artists of this magmtudo continuing dramatic evidence modest car system. the compatible discrete 4- instruments come jumping demand the ultimate in state- ot our far-reaching com Today's CD-4 discs stand channel record meets these out of the speakers. I get of-the-art recording tech mitment to CD-4. Everyone, toe to toe with any stereo criteria. That's why. to me. that 50-piece band marching nology. They deserve the from hardware manufacturer product. In frequency CD-4 means freedom." right into the room" only 4-channel disc that to retailer to customer can response, total playing time encourages full creative be assured there will always and in physical durability. freedom without limitation bo CD-4 product. "The And, they play true quad." as those who provide full However, many now CD-4 logic matrix circuitry. An ab albums featuring the most The CD-4 roster,solut e must, by the way. for The sound on popular artists of today arc II doesn'l make any diffe invest Ihe many thousands matrix performance that even Many of the world's great scheduled for release after rence how good the of dollars required to make begins to approach ihe musical artists have already the printing of this publica quadraphonic disc recording that kind of production and separation quality ol CD-4, CD-4. made their CD-4 debut. We tion. For the most current list process is. If Ihe audio marketing conversion. and then only under certain think it's an impressive list of CD-4 Compatible Discrete hardware manufacturers performance conditions. and present it here for your 4-Channel Discs, check with don't produce the equip That's why we're excep convenience. your local record retailer. ment you need to hear il in tionally proud of the growing Look through the following Peny Como Ooyd Cramer And I Love Voi. So APDi-0'00 in COnceri . APDl-0661 all its glory at home, it isn't roster of hardware manu list of hardware manu The jimmy Castor B Linen Uimwiion III . APD1-D103 "he C» E*an* OicifS"* Plart 110 MUM: DI Jim Hundiu APOI-D&&? the Guess Who • • ID APD1OI30 worth a hoot. But again, facturers who have joined facturers who think enough Horny Hugo Montenegro tiro Modem Quartet i.u.i Oul v. 1 • 1 Homy Mancini ...APDt-06'2 that takes a major commit the CD-4 ranks. Today, there about Ihe potenlional of CD-4 O'ues Are Back Q0-I6S? Kail's D-amonos APDI-0U7 Tho Jan Piano Quartet C harms Minflii* JOSO Fo-einno LOI II Happen . APD1.D680 ment on the pari ol the hard are more than 25 CO-4 to make their equipment Mmgus Move* QO-teS) Com pa rim cits APO'-OU' jotloraon S'arsnip Btlii Coh'iam Dot lie Weal Drooon Fly APD1-07U ware manufacturer It means cartridges to choose Irom. completely ready for the Speciium QD-72W il M's AingN w-lh Vou' Jasf *hai CliSrely Pride Honorta Fi.uk i ve Looking Far APDI O'il Peide ot Amer.ea APCi-O.'J' new designs, new tooling, And al latest count, more significant marketplace it -;• . , mo SoBiy QU '21' Floyd Cramer Danny Oavis and Ine KnihuHe D'asn nwbnj Mann Super Country H.» AP01011S Latest and dealest APDI-0J7* new models, new marketing than 50 electronic equip represents. Hold On I'm Comm QD-1632 David i. i' • i • T -.. APO'0i'3 The Hues Corporation Haun-n'r. He>:l Livo Cianoy P'ldo Ftoekm' Soul APDt-0»5 direction. It means that he ment manufacturers include BlMh Oa" *-dn»a* OU (019 You might come to the con S*COl Country APDV021I The Guosi Aha i.'. • -• mvitwtr Flavours APD1.0H3B CD-4 demodulation capabili Danny Uavs ani! The msnv.no SMaii has to believe In the techni clusion that most hardware E>1«n»ior. of * Man Q3-TOS Hugo Moniarsnra Buna Midler ConObean Ciurse APO-W32 cal and sales viability of the ties m their quadraphonic manufacturers have already fhe Onine M 00*239 Ji>i-y Rfincl Dinora oy QroiF-ari _ APOt-0764 rno Spinner» lorri Mr fee APOV073B Dun on Man Dai APOi-Ods? products—over 5 as many Honmo Ml map product strongly enough to made their choice, too. rho $atnn#f* 'o> I 'ic Be»l ol Inn 'J*M Who A Leotnd In My Time APD1^IB« Aretha Franklin Vol U A PDI 0269 Elvis Presley Equipment Manufacturers 'He Boil Ol Arelho Fit|n«lin QD 0JJ1 Henry Mancini Hi« Piano. Orcn Promina Land .. ...AP0:-0j?3 AKAI Kokusai Musen Rotel Out? Lllinolon ml tho Country Genlioman APDI-07M Floye Cramer Ne* 0>l««ni Suit* QO-1M0 r»o friondl Ol Oi*lineli0i Plono Masierpieces I9C0-I9'5 APD'-OiSJ Audio World Magnavox Sanyo Oil FJvao* GrealestH.!* APDl-03?a Svengah QO-IM Doily Par:on OrmanayrTne PnlladeiB'na O-ci B&O Marantz Sansui Aretha FtttkMn i' - : Ovor APDIJJ6S T'H' Famashc Pr.iijdelpnmn% HeyrJ C>nrrni Vol 1 AFtni-CW? tly* al ivimoic .Veil OD-JJOS B.G.W. Miida Sharp CiaMol73 APDIOJM O'mandy.'The PhilaCetphu Oien M.ke Oidl-eio hiliMtn achrmi'son APDi-Ui9 ShnsTa'oviCh Symphony Ha IS ADOi-OOH Brother Mitsubishi Sherwood Tubular Dels ODO-'Ob Je« ••son Air piano 0' Teier.«s Ine'ed'h'e Plugflon m £nc Clapton . i 1 • i' • • • • i • - A PD 1 - II] M Clarion Muntz Shin Shirasuna Denki •ffti Ocean BivO 00 to3t G'inasira-Kvn Hr*ard and GM Alvma Alan UUla;e< Prcsc! Stolen Goods Cybernet NEC Sonab George Fiynn Super B-iker* APD1-D329 join Cage OC-OT06 Cams L.Wed Irum ihe Uasiers AHOIO016 Charley Pr.ce O-mandy'Thu Pr»iacmpn.J Orefi. Crown Radio Nikko Standard B>ii . " i- -•I ..-I.... i.... AP0'-rjJ9r MoMeyfl'ip OD/9'00 Iho 'aniaunr Ph.laOn'phians ihe Gje'-i vweo Vol. 2 .. AROI-Wt; Denkl Onkyo Nippon Columbia Superscopo EnoSaumte PoaO rooO APDI-C40S Wiretap QO-MC6 Ormandy the Pniaaeln*iio Cch Electrohome Noresco Sylvania D Sibelius Symphony No. 2 AttOI-MiB NB'Dm Mono Caiapasas APOI-CHIO '" '11 1' I' ' -i OlCh. Fisher Onkyo Tanasawa R«BBH OD-IOSi Hugo Monierogio Bach's Cinatesi Fuflues . . A1DI-C076 •'•i\ i ji> Wh.to Band QO/308 Mjgo m WondorLand APQ1-WI3 Ormandy'tno PMiaaelflia O'Ch Foster Panasonic Technics by Panasonic J GeJIsBand Elvii fre-.ky Icnaikovsty Suilei'cn KiOMmaien 00-1810' CUi9-Mor.a l.«m Hawaii V.a The Nuicracer AitDl-W?' General Philips Terutron New Ana improved .. QD-iaiin Saieime VPSX WOW Ormangi'Tht Ph.lae»iphia Orch Hair (Trs Amurican Tnnai Gladding Claricon Pilot Toshiba KoMil Gioran flimskyKona*^v " • > . * DO 1 07*6 • 1; APOl-OP?? ineProphoi 00-IB12C lue Ne
ambience separation and decreases joystick. discrete 4-channel record. Q-8: A pannlng-typo audio control A sound characteristic the full dynamics of the quadraphonic 8-track tape cartridges resulting from reverberance— designed to facilitate 4- containing 4-channel Gbming original master recording. broadcasting: such as the effect that occurs Particularly detrimental to channel balancing. Usually programming. 4-channel transmission via in a concert hall when the quadraphonic sound on the panel of the d-channel RM: FM signal Although no direel sound t>f an instrument accuracy- receiver. Performs the same Stands for "regular matrix." to terms standard system has yet reaches your ear a split decoder function as separate left- Also known as the QS been adopted, tests are second ahead of the same An electronic device that right, Iront-rear controls system. currently being conducted sound after its been reflected takes matrix encoded logic: separation: with in both the matrix and off the walls and ceiling of signals and translates them A special circuit in an SO The degree of isolation discrete formats. Since FM , the auditorium, into 4-channel output, matrix decoder that elec maintained during the stereo broadcasters consider matrix carrier* demodulator: tronically reconstructs some or quadraphonic recording quadra to be basically a stereo The primary signal transmit of the quadraphonic effect and reproduction process. Circuit used to extract the system, tho greatest test ted in radio broadcasting. lost during the SQ encoding- The opposite of "crosstalk." four discrete channels from interest has been in the Also used to describe the decoding process. Various A high degree of separation phonic. the CD-4 Quadradisc. discrete area. The selection ultrasonic frequency signal degrees of logic are provided prevents dilution and distor discrete: of a standard 4-channel FM Every new technological that provides the two addi in playback equipment, but tion of the sound field A constantly independent system is expected about a advancement brings wilh II tional discrete channels on only a "full logic" circuit has present on the original audio signal, such as those year after those tests are its own unique language. the CD-4 Quadradisc. the ability to reproduce master tape. stored on each track of a concluded and the results Words that suddenly mean CD-4: quadraphonic recordings with master tape. Also used to submitted to the FCC. Shibata stylus: something different than Stands for Compatible describe the type of sound separation approaching that quadraphonic sound An advanced stylus design they've ever meant before. discrete 4-channel. produced by the CD-4 of present stereo records— Also called "quadrasonic" created to reproduce the Words that have been The only full range discrete Quadradisc system. and then only under special and often shortened to discrete 4-channel disc, yet invented to describe the 4-channel disc system on the Dorren system: conditions, "quad." All refer to the provide perfect compatibility features and functions of a market. Bears the trade A discrete 4-channel FM matrix: sound field created by in wilh existing stereo or new invention name "Quadradisc." broadcasting system. Named Any system that reproduces formation being recorded monaural records. Permits channel: for its inventor, Lou Dorren. quadraphonic sound by and reproduced from four retrieving ol signals up to mixing 4 channels into two Quadraphonic sound—an A sound path. Monaural dynamic range: different directions—a 360 60,000 Hertz. Also provides (encoding), and elec longer record life than invented term in itself—is no (mono) systems utilize a The volume span between degree circle of sound with tronically returns Ihem to different. To help you under single channel. Stereo uses the listener in the middle. elliptical stylus tracking at the softest and loudest four channels (decoding) stand 4-channel sound two channels—left
surface al least, a battle between two matrix systems and one laclurers can bring out throe or Whoro is 4-channel sound golm, discrete disc system four models of electronics Add In tho U.S.? Is it, as many say. Our advice to tho consumer is Is 4-chnnnel software gelling to that the material shortage What Is Ihe playing lime of n Q&A*4.dyin g out as a market entity? easier lo lind? caused by such an unpredict 4-channel disc? simply IfiHl he shouldn't worry about any battle. Just buy the able thing as a petroleum Even though quadraphonic program material he wants shortage. sound has been around lor Quadraphonic sound is more rogardiess of the format. The prime (actor a record As 1974 progressed, however, Essentially the same as a stereo many years now. there are alive than it over has been, and Nearly all new a-channol retailer has to consider is there was a significant relaxa disc. it's {jutting healthier all iho lime recoivors provide circuitry lo product movement. He has to tion ol the compound shortage, a number of disturbing ques Today, however, the audio reproduce both matrix and give the most room to tho and quadraphonic reloasos aro tions that still cast their industry has a much more discrete formats, so tho product that moves through his back on schedule. Right now. realistic view ot its growth consumer really won't have 10 store the quickest. There is no the total availability ol CO-4 Will a 4-channel disc syslem shadows on the efficacy of potential, it has nol become, as make any choice at all. question that currently stereo product in the U.S. >s about still play my slereo records? the 4-channel medium. Since somo initially professed, a From our point of view, the records are that product. 200. and the hopes aro to at complete revolution in Ihe battle ol the 4-channel disc is However, with more and bolter leasl double that number by the one of the prime functions marketplace, nor was it ever also over There is only one real 4-channel records becoming end ol 1975. Absolutely. Any system realistic to believe it would bo 4-channol disc—the CD-4 available and a more positive of this publication is to shed designed to play CD-4 records Quad Is not a revolution, bul Compatible Discreio Disc. As we attitude about the future o! tho will also play any standard more light on the field of instead an evolution. An orderly sou tfio luiure ot the quadra 4-channel disc, sales of quadra stereo record—bul with a now growth In Ihe hardwaro markal- phonic disc, the discrete catalog phonic product are moving closer quadraphonic sound, we Is a 4-channol sound syslom a degree of depth possible only place goared to as fast a soft will grow rapidly and ovoniually to those of stereo product, present the questions we lot more expensive than a with a 4-channel playback sys ware growth as can be reason tho matrix systems will bo accounting tor a moro significant stereo syslem? tem most frequently encounter ably oxpected from record relegated to their primary role- share of the retailer's profit. about 4-channel sound's companies. enhancement of stereo product For thai reason alone, Ihe availability of 4-channol software Since additional circuitry and present position and future In addition, new technological has Increased dramatically in additional speakers are needed achievements in quadraphonic the past year. Add to that the Are 4-chann-l records any more potential, along with for 4-channel reproduction, a integrated circuitry have recently tact that record producers now difficult to handle than o slereo quadraphonic system is initially answers we hope will reduce made their appearance Which see the potential of iho 4-channel record? Are rclail dealers responding more expensive than an equi now means better performance disc and are recording more some of the unnecessary valent slereo system. However, al a lower price— and an favorably to 4-channel in both and more of their artists In apprehension that surrounds with new developments in IC's Incroaso in the market potential hardware and software markets? this medium. A bigger quadro and 4-channel technology, No. Simply clean them ft. Add lo il the fact that quadra phonic catalog means groator oxcellenl quadraphonic systems frequently as you would a phonic software releases consumer interest and n can now bo assembled lor about standard stereo rocord, uso Ihe continue to emerge, quadra As dealers and salesmen on Iho correspondingly great availa tho same outlay as a modlum- proper stylus pressure, and youi phonic hardware sales continue tetail level gain greater ox- bility of 4-channel soltwnie at pneed stereo system. Qui CD-4 disc should deliver the to grow, and many touring rock porionce in the 4-channel the retail level. whatever ihe additional cost, same amount or even more groups and motion picture medium, their response is be any truly involved music lovor performance lite than tho samo theatres have now converted to coming increasingly more who has already mado tho 4- stereo disc. quadraphonic sound systems. enthusiastic. Software dealers channel Invesiment will loll you It simply means that 4-channoi are now asking for larger slocks thai iho new experience in lotal sound is very much alive, and ot Ouadradiscs. Audio hardwaro How last is the 4-channel sound it provides Is well worth its growth rate may surprise us dealors are devoting more software catalog growing, and it—and more. al) very pleasantly. display and demonstration how fast will it grow in Ihe space to 4-channet equipment. luiure? In lact, those dealers who have mndo a lull commitment to 4-channel are finding that it is Il is difficult to view ihe giowfh What do 4-channel records representing a larger and larger Whon will the battle ot Ihe ol the catalog apart from tho cosl? portion of ihelr overall business systems bo over, and who will world's economic developments The key to quadraphonic growth bo tho winner? There is always a shortago of however, is knowledge and the product during tho initial CD-4 records cost only slightly dissomination ot accurate, introduction of any soltwaro more than stereo records— understandable information medium, because it is simply about 20% on tho average—yet In the tape format, there are no about it. Wo hope this publica impossible to "create" a catalog doiiver twice as much informa tion will help toward thai end. competing systems. With Ihe of "1500 or so items in as short tion and an exciting new musical disc, however, there is. on the a time as hardware manu- dimension to the listener. We gratefully acknowledge the mutual cooperation of JVC America. Panasonic. Technics by It takes someone with a Panasonic, RCA Records and Warner/Elektra/ special kind of artistic ap Atlantic Records in the publication of this booklet. preciation to comprehend the aural magnitude of Matsushita Electric Corp. of America quadraphonic sound. Some 1 Panasonic Way. Secaucus. New Jersey 07094. one who wants to hear more than sound, listen to more JVC America, Inc. than music. Someone who 50-35 56th Road. Maspeth, N. Y. 11378. is totally involved in the music as well as the RCA Records As a recording engineer, 1 have medium. If you've taken tho 1133 Avenue of the Americas, Now York, N. Y. 10036. always fell that any quad disc time to read this entire system must offer the listener booklet, you're that Warner Communications Inc. true concert hall realism and someone. And if you'd 75 Rockefeller Plaza New York, N. Y. 10019. spatial integrity. To achieve like someone who feels this result it must have the same the same as you do to keep degree of separation which is you informed about the inherent in a 4-channel master latest developments in tape. In the long run, the con quadraphony, simply send sumer will be satisfied with your name and address to: nothing less. CD-4 has evolved rapidly over the last two and JME Associates one half years and represents 6363 Sunset Boulevard the only practical disc system Hollywood, California 90026 embodying discrete performance. A free copy of our informative newsletter, CD-4 Forum, will be sent to you each time it's published—our way of saying "thanks for being John Eargle someone special."
John Eargle Is ono of America's foremost aulhorltles In the field of sound recording. His present company, JME Associates, is a consultant to the CD-4 advocates Panasonic, JVC, RCA Records and tho WEA Record group in areas relatad to four- channel technology. He holds the Degrees of Bachelor ol Music. Bachelor of Science, Master of Music, and Master of Engineering. Mr. Eargle has written and lectured extensively In areas of recording technology. He is a member of the Acoustical Society ot Amorlca. a senior member of tho Institute of Electrical and Electronic Engineers, and currently president of tho Audio Engineering Society.