{"@context":"http://iiif.io/api/presentation/3/context.json","id":"https://arsc.aviaryplatform.com/iiif/p26pz52n41/manifest","type":"Manifest","label":{"en":["Red-Book De-Emphasis Using the iZotope RX EQ Module"]},"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":["Gary A. Galo (Presenter)","Brad McCoy (Chair)"]}},{"label":{"en":["Date"]},"value":{"en":["2022-05-19 (Created)"]}},{"label":{"en":["Format"]},"value":{"en":["Video"]}},{"label":{"en":["Description"]},"value":{"en":["\u003cp\u003eMany early digital recording systems used analog high-frequency pre-emphasis ahead of the analog-to-digital converters as a means of improving the poor low-level, high-frequency performance of the early converters. A complementary analog de-emphasis curve was applied in playback, after the digital-to-analog conversion. The Sony/Philips book of specifications for the Compact Disc – known as the \"Red Book\" – included optional pre-emphasis and de-emphasis curves, with time constants specified as 50 and 15 µSecs. Some early CDs, mostly discs made in Japan by Denon, employed this option. Several early digital recording systems, including the popular Sony PCM-F1, also employed pre-emphasis and de-emphasis equalization using the same time constants. Some 40 years later, audio engineers and archivists are faced with myriad problems in transferring obsolete digital formats to modern digital audio standards, not the least of which is how and where to apply \"Red Book\" de-emphasis when needed. This presentation will describe the nature of the \"Red Book\" pre-emphasis and de-emphasis curves, including an analysis of these curves based on computer simulations. These computer simulations can be used to create a precise de-emphasis curve applied in the digital domain, using the equalization module included with the popular iZotope RX restoration software. The presentation will describe the evolution of digitally-applied de-emphasis, the problems associated with some of the earlier efforts, and the final settings developed for the iZotope RX EQ module. Frequency response measurements based on computer simulations will be shown, verifying the accuracy of the final version, along with the errors inherent in some of the earlier efforts.\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"]}},{"label":{"en":["Video Editor"]},"value":{"en":["Nathan Georgitis (Video Editor)"]}}],"summary":{"en":["\u003cp\u003eMany early digital recording systems used analog high-frequency pre-emphasis ahead of the analog-to-digital converters as a means of improving the poor low-level, high-frequency performance of the early converters. A complementary analog de-emphasis curve was applied in playback, after the digital-to-analog conversion. The Sony/Philips book of specifications for the Compact Disc \u0026ndash; known as the \"Red Book\" \u0026ndash; included optional pre-emphasis and de-emphasis curves, with time constants specified as 50 and 15 \u0026micro;Secs. Some early CDs, mostly discs made in Japan by Denon, employed this option. Several early digital recording systems, including the popular Sony PCM-F1, also employed pre-emphasis and de-emphasis equalization using the same time constants. Some 40 years later, audio engineers and archivists are faced with myriad problems in transferring obsolete digital formats to modern digital audio standards, not the least of which is how and where to apply \"Red Book\" de-emphasis when needed. This presentation will describe the nature of the \"Red Book\" pre-emphasis and de-emphasis curves, including an analysis of these curves based on computer simulations. These computer simulations can be used to create a precise de-emphasis curve applied in the digital domain, using the equalization module included with the popular iZotope RX restoration software. The presentation will describe the evolution of digitally-applied de-emphasis, the problems associated with some of the earlier efforts, and the final settings developed for the iZotope RX EQ module. Frequency response measurements based on computer simulations will be shown, verifying the accuracy of the final version, along with the errors inherent in some of the earlier efforts.\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/collection_resource_files/thumbnails/000/161/277/small/ARSC_conf_2022_Galo_video_thmb.jpg?1656365500","type":"Image","format":"image/jpeg"}],"items":[{"id":"https://arsc.aviaryplatform.com/collections/1992/collection_resources/75214/file/161277","type":"Canvas","label":{"en":["Media File 1 of 1 - ARSC_conf_2022_Galo_video.mp4"]},"duration":3586.90133,"width":640,"height":360,"thumbnail":[{"id":"https://d9jk7wjtjpu5g.cloudfront.net/collection_resource_files/thumbnails/000/161/277/small/ARSC_conf_2022_Galo_video_thmb.jpg?1656365500","type":"Image","format":"image/jpeg"}],"items":[{"id":"https://arsc.aviaryplatform.com/collections/1992/collection_resources/75214/file/161277/content/1","type":"AnnotationPage","items":[{"id":"https://arsc.aviaryplatform.com/collections/1992/collection_resources/75214/file/161277/content/1/annotation/1","type":"Annotation","motivation":"painting","body":{"id":"https://aviary-p-arsc.s3.wasabisys.com/collection_resource_files/resource_files/000/161/277/original/ARSC_conf_2022_Galo_video.mp4?1656365444","type":"Video","format":"video/mp4","duration":3586.90133,"width":640,"height":360},"target":"https://arsc.aviaryplatform.com/collections/1992/collection_resources/75214/file/161277","metadata":[]}]}],"annotations":[]}]}