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Antique Hi-Fi Archive Connecticut Audio History

UPDATED: Cook Labs Test Records Circa 1952

CookLabs_LP10_CoverSeveral weeks ago I ran an article on Emory Cook, binaural recording pioneer and Connecticut entrepreneur.  Click here to read that piece.  T.F. contributed the wonderful and very-hard-to-find resources for that article, and we follow up today with some scans of a notable early Cook Labs product: the LP10 test-record.  You can download several of these resources here:

Emery Cook – Test Records brochure

Emery Cook – Series 10LP test record sleeve

Emery Cook – Series 10LP data sheet

Emery Cook – Series 10 Test Record Technical Bulletin

Cook_feedbackCuttter************

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I have a small collection of Test LPs myself, but I know nothing about the history and development of this type of product. T.F. graciously provided some background in the comments section, and I have reproduced that text here to facilitate easier reading:

“The way I understand the history (of test records), both RCA and Columbia produced microgroove test records when they developed their microgroove formats (45RPM 7″ disk for RCA, 12″ and 10” 33 RPM disks for Columbia). But these test disks were for professional mastering places, playback equipment designers and manufacturers, etc.

The Cook record seems to have been aimed at both professionals and serious hobbyists who were building and/or setting up phono playback equipment. Cook was also clever with marketing, this record proved the quality of his cutting equipment. In the early days of the microgroove, I don’t think there were very many other options for the hobbyist beyond the Cook record.

In 1954, when the industry adopted the RIAA curve, a bunch of semi-professional “test and demo” records came along, sometimes including calibrated test tones and sometimes just including “tracking challenge” music and sound effects. There was another bevvy of “test record” releases when the stereo LP debuted in 1958. In the 70s, we had more.

From the early days of the stereo LP, the CBS Labs test records were the standard device for designing and building playback equipment.  The Command Stereo Test Record was made at Fine Recording. It includes calibrated tones to set level and check frequency response, as well as a phase test and a silent groove to test for rumble. Side two is a narrated tour of some Command pop tunes pointing out what to listen for, to determine if the cartridge is tracking correctly.

The most recent calibrated test record is from Analogue Productions. Its levels test out to be accurately described and it is well calibrated to the RIAA curve, so it’s quite useful for setting levels, balance and testing the frequency response of a cartridge. It’s also got a useful test for wow and flutter and a speed-check tone (which shows that many of the modern lower-priced belt-drive turntables don’t hold 33.3RPM due to cheap motors and cheap platter bearings). The Analogue Productions record is very well manufactured, on quite and pretty much tick-free vinyl.

One big thing that test records have shown me is how many cartridges have uneven channel-to-channel levels and sometimes uneven frequency response. In the lower priced world, you can’t beat the Denon DL-110, it’s super-flat and nearly identical channel-to-channel (3 different units tested, manufactured over a 10-year period).

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Connecticut Audio History

Scully Model 100 Sixteen-Track Tape Machine of 1971

Scully_100_16trackMachine_1971Above: The Scully 100 is introduced: 1971.  I love these headlines…  “…turns you on…   blows your mind….”   Amazing.  Anyhow… any of these still makin albums out there?  Let us know…

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Connecticut Audio History

The CBS Tech Center, High Ridge Road, Stamford CT

CBS_Tech_Center_1975Above: The CBS Technology Center, development site and testing-ground for audio hardware, as seen in 1975.  An important piece of Connecticut audio history.  Any of y’all ever work at this location?  Is the building still standing?  Drop us a line and let us know.

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Connecticut Audio History

1973: The Mark Levinson Pre Amp

Mark_Levinson_Preamp_1973No account of CT audio-history could be complete without Mark Levinson.  Above: a 1973 advert for his first product, the LNP-2 pre amplifier.  Although it cost $9,050 (yup….) in 2013-dollars, a unit recently sold on eBay for $4500.… so not a terrible investment overall.

Click here to download (not my link…) Barry Willis’ account of the career of the CT audio legend.  It’s worth a read.  Starting with…  age 22, he built the console for Woodstock.

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Antique Hi-Fi Archive Connecticut Audio History

1958 Bozak Hi-Fi Speaker Catalog

Courtesy of reader T.F., download the complete 1958 Bozak speaker catalog.  BTW, I am trying the PNG graphics format for the first time, so if this post displays incorrectly please let me know in the comments section.

DOWNLOAD: 1958

Products covered include the Bozak B-400, B-300, B-305, B-310, and B-302 hi fi speaker systems, as well as the B-199A, B-209, B-200x, B-207A, and B-200xA drivers.  Bozak N-10102, N-103, and N-104 crossovers are also described.  Bozak apparently also offered all of their 1958 systems as baffle-only, intended for custom installation work…

Bozak was a CT -based operation and we’re proud to have had ’em.  Click this link for our scan of the 1970 Bozak catalog.

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Connecticut Audio History

UPDATED: Emory Cook, Binaural Recording Pioneer

Emory Cook records Long Island Sound at Shippen Point, Stamford CT (with two mics, of course): 1954.  He is using a Modified Magnecorder.  This, and all other reproduced materials in this article are courtesy T.Fine.

***UPDATE: I’ve added a variety of links to relevant Cook-resources at the end of the piece. ***

Thanks again to contributor T.F. for providing an extensive collection of documents relating to one Emory Cook, inventor, Connecticut businessman, and pioneer of binaural sound.  There is much too much information contained within these primary source documents for me to adequately paraphrase, but here is a quick synopsis.

Cook (at left) attended MIT, briefly, in the 1930s, and received his electrical engineering degree (minor in communications) from Cornell immediately following.  After an incomplete stint at Columbia Grad he went into industry as an engineer, primarily radar and some broadcast work.  Excited by the postwar prospects of magnetic-tape recording and the general explosion of sound-recording technology of the late 1940s, Cook then began his own enterprise of designing and manufacturing sound-recording hardware which he claimed offered vastly better performance than competing  products.  This led, in short turn, to Cook Records, which issued over 140 LPs over the course of two decades.

Above: Cook’s preferred solution to the problem of creating a fully mono-compatible stereo LP disc record.  Two separate cartridges with ample spacing each track a separate groove.  The disc could therefore be played on any mono machine without issue.  Click here for further information on this forgotten technology.

Cook achieved the widest recognition for his research and development of binaural sound apparatus.  Binaural sound is a specific type of stereo (two channel synchronized) sound which specifically attempts to capture sound in a manner consistent with the hearing apparatus of an unimpaired (IE., having full use of both ears) human animal.  Stereo sound is much broader field; truly, any system in which two discrete channels are programmed and synchronized for playback on two separately-located transducers could be described as ‘stereo.’ As the past sixty years of electronic media history has played out, true Binaural sound techniques have had limited application and/or consumer appeal, but it is critical to recognize how the field of stereo sound was largely birthed by individuals such as Mr. Cook who were so taken by the attempt to recreate, electronically, the biological process of two-eared hearing and the spatial-localization that it affords.  Beginning in the early 1950s, Cook published a number of papers and articles on the subject.  I would encourage you to read them and get the story from the horse’s-mouth, as-it-were:

DOWNLOAD: Tele-Tech-5211-Emory_Cook-Recording_Binaural_Sound_on_Discs 1952: Cook explains and defends his two-cartridge stereo LP system and offers a design for an economical stereo amplifier.

DOWNLOAD: Emory_Cook-Binaural_Disks.  A more consumer-oriented essay which covers similar material as the prior.

DOWNLOAD: Emory_Cook-AIEE-530616-Binaurality.  A technical paper on binaurality delivered in 1953.  T.F comments:  “(it is) interesting how (Cooks’s) summary of past technology ignores Blumlein’s 1934 patent.”

DOWNLOAD: High_Fidelity-5410-Emory_Cook. A largely biographical piece from HIGH FIDELITY, 1954.

IN ADDITION: The Journal of the Audio Engineering Society ran an excellent essay by Cook in their very first issue, January 1953.  Since the AES depends on the sale of their previously published material for revenue, I do not think it suitable to offer that article here; you can, however, purchase it directly from them.

Above: Cook’s suggestion for creating a listening environment for Binarual audio playback.  Contemporary thinking seems to regard headphone-listening as the only suitable mechanism for Binaural playback; Cook’s advocation of loudspeakers suggests that perhaps the difference between ‘binaural’ and ‘stereo’ need not be quite so rigid.  T.F. comments: “Cook’s explaination of Binaural…is somewhat different from the 1930’s theories of Alan Blumlein. Cook always assumed speakers, and also the right triangle of two speakers and a listener in the center. “

Cook spent considerable time and energy traveling the world to capture sound-events using the specialized equipment that he developed.  Like many early audio pioneers, he was greatly interested in the power of sound and sound-recording itself; musical recording was an important part, but only a part, of what he saw as a world of exciting sounds to capture and make available to consumers through recorded media.

Above: one of his less high-brow offerings.  Click here for liner notes: COOK01071_Burlesque.

Above: a more concise summation of the technical recordist I have not seen.  My $.02: I can’t wholly disagree with what Cook states here, but perhaps it is wiser to recognize that his conception of a recording engineer is one of many valid approaches to that field of endeavor.  Perhaps in 1953 this was tougher to see.  It’s certainly not irrelevant in our current moment, though; Cook’s viewpoint reminds me very much of contemporary recording great Steve Albini, who’s extreme preference for documentary-style production has led to some great (Nirvana, Palace) and not-so-great (Jarvis Cocker) albums.  Sometimes it’s the right move, sometimes it ain’t.

Cook remained very active in audio production and technical work at least into the 1970s; above, an image of his factory circa 1970.  Cook Laboratories offered a range of services including a recording studio, cassette and record duplication and stamping, A/V production services, and specialized equipment manufacture.

For a fascinating view inside the above-depicted plant, click below to download their circa 1970 catalog of services.

DOWNLOAD: Cook_Laboratories-1960s_brochure

There is a ton of other information online concerning Cook; here are some good places to start.   Cook passed in 2002 (click here for his obituary as published by the AES) and the catalog of recordings that he controlled is now owned and archived by the Smithsonian.  In fact, you can purchase the ‘Burlesque’ recording depicted above from them.  Cook’s Wikipedia page was apparently created with input from a former employee; if anyone out there worked for Cook at his plant in CT, please drop us a line.   I also welcome any substantiated corrections to this piece.  And I look forward to a heated discussion of the merits and/or fallacies of ‘binaural sound’ in the comments section.

Thanks yet again to T.F. for making these rare archival materials available to all.  For those of you unacquainted with T.F. and his rather unique perspective on the history and development of commercial stereo-sound recording, please click here.  

Categories
Connecticut Audio History Pro Audio Archive

Excellent Article on Larry Scully and the Variable-Pitch Lathe c. 1956

Download a six-page article from HIGH FIDELITY 1956 concerning the history of the Scully corporation of Bridgeport Connecticut, including an explanation of the significance of the variable-pitch Scully lathe.

DOWNLOAD: High_Fidelity-5612-Scully_Sm

At left: Larry Scully circa 1956.  Thanks to reader TF for this very interesting piece.  As I have mentioned before, I drive by the old Scully factory nearly every day on my way to work at Gold Coast Recorders.  I had been hoping to uncover some history of this once-great Bridgeport institution and this article certainly sheds some light.  Some interesting bits from the article: in the 30s, Scully briefly ventured into the manufacture of P.A. equipment.  And beer coolers.  Also of note: the price of a Scully lathe in today’s dollars?  $72,000.

Previous Scully Coverage on P S dot com:

The Plant

The Model 601 Lathe

Some very neglected Scully 280s

Categories
Connecticut Audio History

Bridgeport, CT Circa 1964

Today: From “Easy Guide To Stereo HiFi,” 1964, ed. Robert Mayfield: a short pictorial on the subject of ‘How a record is made.’  Nothing too exciting here; I am reproducing this primarily because the plant shown in the article is none other than the Bridgeport, CT Columbia Records plant.  As I’ve mentioned before, this building is still standing; it is now ‘loft condos.’  The BPT Columbia plant was, AFAIK, the first facility in the world to manufacture 33rpm LP records;  SCULLY, America’s top  manufacturer of LP cutting lathes, was located a dozen blocks away, along the same train tracks that today still serve  commuters, dotted with idled freight cars resting on derelict short-ends of tracks strewn throughout the East End.

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Connecticut Audio History History

My girl is cool. She digs the old records.

A mere 10 years after Bridgeport-based Columbia Records introduced the LP record, we see evidence that record collecting was already a well-entrenched hobby/sport/folly.  At left is the cover of “Record Research” Vol . 2, No, 6, Issue 18, dated July 1958.  Of course, those folks (and maybe some of you are still kickin…) were more probably more interested in collecting 78s and Wax Cylinders such as our comely friend above is holding.  Stay tuned for an upcoming piece on Columbia’s history in Bridgeport… and for now, check out these bits of Columbia-collecting circa 1958.

 

 

Categories
Connecticut Audio History

East Bridgeport, CT

Above: the view along Crescent ave from the intersection of Crescent and Bunnell, where a later Scully Recording Instruments Corp. plant once stood.

Last weekend I stopped by 305 Knowlton, a gallery/artist-studio-building nearby my studio Gold Coast Recorders; there was a flea-market/craft-fair event happening at 305.  My friend J and  I bought some records from MT (who is in all likelihood the first person I ever bought a used record from, some twenty-plus years ago…): I picked up Obscured By Clouds, Booker T and The MG’s ‘Uptight’ soundtrack, and a Ma Rainey Comp.  I asked J if he wanted to take a ride to see some local history, and within a minute we pulled up next to this impressive but nondescript building.  “What’s this?” asked J.  My response: ‘those old records in your lap – they were most likely created using machines designed and built in this very building.’

This is the Walter Street address once occupied by the Scully Recording Instruments Corporation (h.f. SRIC).  As far as I can tell, SRIC dominated the US vinyl lathe market for most of the 20th century.  Not much has been documented about the history of this important company, but we can conjecture a few reasons why they may have sprouted in this unlikely spot.  East Bridgeport was developed and built by PT Barnum (yup, the Circus-impresario) largely to support the mid-19th century sewing machine industry, especially the works of Elias Howe.  Howe’s tale is a long and complex one, but his company was responsible for drawing a huge number of skilled mechanical craftsmen (or Mechanics, as they were then known) to East Bridgeport in the mid 19th century.  This in turn led to the reputation of Bridgeport as one of the machine-making capitals of the world.

Above, another view of the former SRIC address on Walter street.  At some point in the 1960s, the SRIC moved a few blocks away to the intersection of Crescent and Bunnell.

The parking-lot shown above is situated at 480 Bunnell, which is indicated as the late-60’s address of the SRIC.   I’ve had various audio-related enterprises based in East Bridgeport for seven years now; in addition to GCR, my modest audio-electronics shop is located just a few minutes from Bunnell street on Connecticut ave; my old recording studio was also once based in that space.  I don’t know why it never occurred to me until now to investigate the previous neighborhood connections.  Bridgeport has several other notable audio-historical connections which I will be documenting soon, starting with Columbia Records.  Stay tuned…