[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-560528-105":59,"doc-detail-560528-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","magnetic-recording-analog-tape","Magnetic Recording - Analog Tape","","Magnetic recording stores information by imprinting an imposed magnetic field, derived from an electrical signal, onto a magnetizable medium. Analog audio tape uses a plastic ribbon coated with fine magnetic particles whose domains align with the field at the record head, creating a retained magnetization pattern. During playback, motion past the read head produces an induced electrical signal, but the inherently non-linear physics introduces distortion that requires corrective circuitry. Recording depends on gap effects and hysteresis, including saturation and coercivity behavior.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/magnetic-recording-analog-tape/560528/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/magnetic-recording-analog-tape/560528.png","ImageObject",300,407,{"name":92,"@type":93},"Fahsai","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-17","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How does analog magnetic recording store audio information on tape?","Question",{"text":112,"@type":113},"An electrical signal is converted by the record head into a magnetic field that aligns the magnetic domains in the tape. The resulting retained pattern of magnetization represents the signal.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Why does playback from an analog tape require distortion correction?",{"text":117,"@type":113},"The recording process is inherently very non-linear, so the induced playback signal differs from the original signal. Analog tape recorder circuitry is used to undo this distortion.",{"name":119,"@type":110,"acceptedAnswer":120},"What is hysteresis in the context of tape magnetization?",{"text":121,"@type":113},"When the applied field reverses, the material remains magnetized until the reversed field exceeds the coercivity. Tape domains “remember” their prior state until they are remagnetized by a sufficiently strong reversed field.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},560528,1792196214,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},549768702563,"https://ap-avatar.wpscdn.com/avatar/8000c4aa63b76e948b?x-image-process=image/resize,m_fixed,w_180,h_180&k=1786536092046926083","Magnetic Recording: Analog Tape  \nUntil recently, there was one dominant way of recording sounds so that they could be reproduced at a later time or in a different location: analog magnetic recording (of course, there were mechanical methods like phonograph records, but they could not be recorded easily) . In fact, magnetic recording techniques are still the most common way of recording signals, but the encoding method is digital. Magnetic recording relies on the imposition of a magnetic field, derived from an electrical signal, on a magnetically susceptible medium that becomes magnetized. The magnetic medium employed in analog recording is magnetic tape: a thin plastic ribbon with randomly oriented microscopic magnetic particles glued to the surface. The record head magnetic field alters the magnetic polarization (not the physical orientation) of the tiny particles so that they align  \ntheir magnetic domains with the imposed field: the stronger the imposed field, the more particles align their orientations with the field, until all of the particles are magnetized. The retained pattern of magnetization stores the representation of the signal. When the magnetized medium is moved past a read head, an electrical signal is produced by induction. Unfortunately, the process is inherently very non-linear, so the resulting playback signal is different from the original signal. Much of the circuitry employed in an analog tape recorder is necessary to undo the distortion introduced by the non-linear physics of the system.  \nFigure 1: In a record head, magnetic flux flows through low-reluctance pathway in the tape’s  \nmagnetic coating layer.  \nMagnetic tape Magnetic tape used for audio recording consists of a plastic ribbon onto which a layer of magnetic material is glued. The magnetic coating consists most commonly of a layer of finely ground iron oxide particles, but chromium dioxide and barium ferrite have also been used. Current production of magnetic tape uses polyester (polyethylene terephthalate) about 35 µ thick as the film substrate, a front surface magnetic coating of about 15 µ and a thin back coating to reduce friction and dissipate static electricity. The particles areacicular (needle-like) in shape and approximately 0.5 x 0.1 µ in size, but each particle may contain more than one domain. The individual magnetic domains that act as separate magnets vary in size, shape and orientation within the particles. For analog magnetic tape, the particles are oriented parallel to the surface of the tape since the system uses longitudinal magnetization to write the signal to tape. The magnetic particles are attached to the substrate with a binder, a kind of glue that fixes the particles to the tape and provides lubrication and a smooth surface that minimizes head wear. The chemical makeup of the binder is important, as it is the primary material susceptible to failure that can render the tape unplayable. It is important to understand that the particles themselves do not move with magnetization, only the magnetic polarization of the domains is changed by the applied field.  \nThe recording process The record head converts an electrical signal into a magnetic field that can be used to create a pattern of magnetization in the tiny magnetic particles of the tape. The head consists of a toroidal core with a small air gap. A coil of wire is wound around the core, which is made of a magnetically permeable metal. Much like a transformer, the record head converts an electrical signal into a changing magnetic field. Since the gap in the head exhibits a high reluctance (the magnetic equivalent of resistance), the field flows through the lower reluctance of the magnetic tape as it moves past the gap. (See Figure 1) As the tape moves away from the gap, the magnetic flux (the magnetic equivalent of current) decreases with the inverse square of distance. At some distance from the gap, it is no longer strong enough to affect the magnetic particles on th","cbCaiqH3wYCvWpcZ","https://ap.wps.com/l/cbCaiqH3wYCvWpcZ","pdf",702239,11,"English","# Magnetic recording concept\n## Imposed magnetic field and retained magnetization\n# Magnetic tape materials\n## Substrate and coating structure\n## Binder role and domain orientation\n# The recording process\n## Record head, air gap, and trailing edge\n# Non-linearity and hysteresis\n## Applied field, coercivity, and memory effect","[{\"question\":\"How does analog magnetic recording store audio information on tape?\",\"answer\":\"An electrical signal is converted by the record head into a magnetic field that aligns the magnetic domains in the tape. The resulting retained pattern of magnetization represents the signal.\"},{\"question\":\"Why does playback from an analog tape require distortion correction?\",\"answer\":\"The recording process is inherently very non-linear, so the induced playback signal differs from the original signal. Analog tape recorder circuitry is used to undo this distortion.\"},{\"question\":\"What is hysteresis in the context of tape magnetization?\",\"answer\":\"When the applied field reverses, the material remains magnetized until the reversed field exceeds the coercivity. Tape domains “remember” their prior state until they are remagnetized by a sufficiently strong reversed field.\"}]","Magnetic Recording - Analog Tape | PDF",1791803434,28]