{"@context":"http://iiif.io/api/presentation/3/context.json","id":"https://arsc.aviaryplatform.com/iiif/5x25b00k2z/manifest","type":"Manifest","label":{"en":["Standard Alignment Tapes: A History at Ampex"]},"logo":"https://d9jk7wjtjpu5g.cloudfront.net/organizations/logo_images/000/000/019/original/ARSC_Full_Logo_RGB_K.jpg?1605438091","metadata":[{"label":{"en":["Agent"]},"value":{"en":["Jay McKnight (Presenter)"]}},{"label":{"en":["Date"]},"value":{"en":["2008-03-29 (Created)"]}},{"label":{"en":["Format"]},"value":{"en":["Audio"]}},{"label":{"en":["Description"]},"value":{"en":["\u003cp\u003eWhen Ampex announced the Model 200 in October 1947, they realized that recordings made on different machines should be interchangeable, meaning consistent equalization, azimuth, and recorded level. So they made \"Standard Alignment Tapes\" to adjust the reproducers to the standard conditions. By the introduction of the Model 300 in May 1948, Ampex adopted what later became the NAB equalizations for 7.5 and 15 in/s, which are still used in the USA. In 1949 Frank Lennert (Ampex) published a comparison between the equalizations used on several professional recorders, as well as a technical paper explaining the equalizations and the basis for them, in 1952. The manufactured Alignment Tapes had a voice announcement that was played from a tape recording, and tones from an multi-frequency oscillator, with an operator switching between voice and tone, and trimming the recorded level manually, as shown in a 1958 paper by Frank Richards in the AES Journal. Continuing Ampex research improved the understanding and practices for the standardization of the tape flux (\"recorded level\"), the flux vs. frequency (\"equalization\"), and the azimuth, in papers by Morrison and by McKnight in the AES Journal. Morrison left Ampex to found the competing Standard Tape Laboratory (1968-1990), and McKnight left to found Magnetic Reference Laboratory (1972-present). The MRL system developed in the 1980s is automated, and now has the voice on a hard disk recording, computer-controlled switching of voice and tone, and an automatic gain control to keep a constant recorded flux.\u003c/p\u003e"]}},{"label":{"en":["Language"]},"value":{"en":["English"]}},{"label":{"en":["Publisher"]},"value":{"en":["Association for Recorded Sound Collections"]}},{"label":{"en":["Rights Statement"]},"value":{"en":["\u003cp\u003eCopyright Association for Recorded Sound Collections\u003c/p\u003e"]}}],"summary":{"en":["\u003cp\u003eWhen Ampex announced the Model 200 in October 1947, they realized that recordings made on different machines should be interchangeable, meaning consistent equalization, azimuth, and recorded level. So they made \"Standard Alignment Tapes\" to adjust the reproducers to the standard conditions. By the introduction of the Model 300 in May 1948, Ampex adopted what later became the NAB equalizations for 7.5 and 15 in/s, which are still used in the USA. In 1949 Frank Lennert (Ampex) published a comparison between the equalizations used on several professional recorders, as well as a technical paper explaining the equalizations and the basis for them, in 1952. The manufactured Alignment Tapes had a voice announcement that was played from a tape recording, and tones from an multi-frequency oscillator, with an operator switching between voice and tone, and trimming the recorded level manually, as shown in a 1958 paper by Frank Richards in the AES Journal. Continuing Ampex research improved the understanding and practices for the standardization of the tape flux (\"recorded level\"), the flux vs. frequency (\"equalization\"), and the azimuth, in papers by Morrison and by McKnight in the AES Journal. Morrison left Ampex to found the competing Standard Tape Laboratory (1968-1990), and McKnight left to found Magnetic Reference Laboratory (1972-present). The MRL system developed in the 1980s is automated, and now has the voice on a hard disk recording, computer-controlled switching of voice and tone, and an automatic gain control to keep a constant recorded flux.\u003c/p\u003e"]},"requiredStatement":{"label":{"en":["Attribution"]},"value":{"en":["\u003cp\u003eCopyright Association for Recorded Sound Collections\u003c/p\u003e"]}},"provider":[{"id":"https://arsc.aviaryplatform.com/aboutus","type":"Agent","label":{"en":["Association for Recorded Sound Collections"]},"homepage":[{"id":"https://arsc.aviaryplatform.com/","type":"Text","label":{"en":["Association for Recorded Sound Collections"]},"format":"text/html"}],"logo":[{"id":"https://d9jk7wjtjpu5g.cloudfront.net/organizations/logo_images/000/000/019/original/ARSC_Full_Logo_RGB_K.jpg?1605438091","type":"Image"}]}],"thumbnail":[{"id":"https://d9jk7wjtjpu5g.cloudfront.net/public/images/audio-default.png","type":"Image","format":"image/png"}],"items":[{"id":"https://arsc.aviaryplatform.com/collections/2672/collection_resources/128639/file/240143","type":"Canvas","label":{"en":["Media File 1 of 2 - open-uri20240504-2220384-x9wqeh.mpga"]},"duration":1241.76475,"width":640,"height":360,"thumbnail":[{"id":"https://d9jk7wjtjpu5g.cloudfront.net/public/images/audio-default.png","type":"Image","format":"image/png"}],"items":[{"id":"https://arsc.aviaryplatform.com/collections/2672/collection_resources/128639/file/240143/content/1","type":"AnnotationPage","items":[{"id":"https://arsc.aviaryplatform.com/collections/2672/collection_resources/128639/file/240143/content/1/annotation/1","type":"Annotation","motivation":"painting","body":{"id":"https://aviary-p-arsc.s3.wasabisys.com/collection_resource_files/resource_files/000/240/143/original/open-uri20240504-2220384-x9wqeh.mpga?1714790510","type":"Audio","format":"audio/mpeg","duration":1241.76475,"width":640,"height":360},"target":"https://arsc.aviaryplatform.com/collections/2672/collection_resources/128639/file/240143","metadata":[]}]}],"annotations":[]},{"id":"https://arsc.aviaryplatform.com/collections/2672/collection_resources/128639/file/240163","type":"Canvas","label":{"en":["Media File 2 of 2 - ARSC_conf_2008_McKnight_qa_audio.mp3"]},"duration":405.6635,"width":640,"height":360,"thumbnail":[{"id":"https://d9jk7wjtjpu5g.cloudfront.net/public/images/audio-default.png","type":"Image","format":"image/png"}],"items":[{"id":"https://arsc.aviaryplatform.com/collections/2672/collection_resources/128639/file/240163/content/1","type":"AnnotationPage","items":[{"id":"https://arsc.aviaryplatform.com/collections/2672/collection_resources/128639/file/240163/content/2/annotation/1","type":"Annotation","motivation":"painting","body":{"id":"https://aviary-p-arsc.s3.wasabisys.com/collection_resource_files/resource_files/000/240/163/original/ARSC_conf_2008_McKnight_qa_audio.mp3?1714847764","type":"Audio","format":"audio/mpeg","duration":405.6635,"width":640,"height":360},"target":"https://arsc.aviaryplatform.com/collections/2672/collection_resources/128639/file/240163","metadata":[]}]}],"annotations":[]}]}