[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-290947-105":59,"doc-detail-290947-en":131},{"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":124,"head_meta":126,"extra_data":128,"updated_unix":130},105,"en","adat-tapes-copied-digitally-tape-recorder-system-overview","ADAT Tapes - Copied Digitally - Tape Recorder System Overview","","DigiOmmel & Co. describes how ADAT tape recordings are digitally transferred via an Alesis XT 8-channel recorder connected to an E-MU 1820 interface for bit-for-bit preservation and easier multi-track file handling. The text explains ADAT’s VHS-based helical-scan transport, tape medium, low-density recording characteristics, and rotary read/write head geometry. It also covers editing reliability, read-before-write processing to maintain seamless fades, and the Toslink “light pipe” multichannel optical interface, including sampling-rate options and signaling protocol.",{"@graph":69,"@context":123},[70,84,106],{"@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/adat-tapes-copied-digitally-tape-recorder-system-overview/290947/",{"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/adat-tapes-copied-digitally-tape-recorder-system-overview/290947.png","ImageObject",300,407,{"name":92,"@type":93},"Grenda","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-16","2026-09-17",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",12,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119],{"name":110,"@type":111,"acceptedAnswer":112},"How does DigiOmmel transfer ADAT tape recordings into digital multi-track files?","Question",{"text":113,"@type":114},"An Alesis XT 8-channel recorder is digitally connected to an E-MU 1820 audio interface to perform bit-for-bit transfer of ADAT tape recordings into more manageable multi-track file formats.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"Why is ADAT editing handled with a read-before-write approach?",{"text":118,"@type":114},"Editing requires modulating a seamless data stream into 8/10 RLL format and using sync and error-correction words. Read-before-write prevents corruption at edit points by reading old material into buffer memory, formatting, concatenating new data, and rewriting the tape.",{"name":120,"@type":111,"acceptedAnswer":121},"What is the “light pipe” ADAT interface and what does it transmit?",{"text":122,"@type":114},"ADAT uses Toslink optical connections based on a self-clocking serial protocol, transmitting multichannel sequential audio divisions. It can deliver up to 24 bits of digital audio data streams across eight discrete channels.","https://schema.org",{"og:url":83,"og:type":125,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":127,"canonical":83},"index,follow",{"doc_id":129,"site_id":62},290947,1789643018,{"code":4,"msg":5,"data":132},{"doc_id":129,"user_id":133,"nickname":92,"user_avatar":134,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":24,"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":130,"read_time":144},7971474921005,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","Leo Backman/DigiOmmel & Co.  \nDigiOmmel is now using Alesis XT 8-channel recorder, digitally connected to E-MU 1820 audio interface unit for bit-for-bit transfer of ADAT tape recordings into more manageable multi-track file formats. We can also repair dysfunctional cassettes and, if necessary, move tape reels into working shells.  \nThe ADAT digital multichannel audio tape recorder uses a standard VHS transport that provides reliable and robust operation based on well-proven helical scan VCR technology. The recording media is a halfinch S-SVHS tape encased in cassette shells.  \nThe format is configured to operate with iron oxide magnetic particles instead of more costly pure iron particle, or metal evaporation tapes. An ADAT recording employs relatively low signal density per tape area. A low-density recording provides very reliable readout system, making the recorded tape signal fairly insensitive to dirt and defects such as crumples and cross-tape weaves. VHS cassettes are well protected, and the rotary heads work to wipe off loose particles from the tape surface. The only downside of reduced signal density, compared to other contemporary DAT formats is the comparatively heavy and bulky cassettes.  \nHelical-scan read/write system  \nADAT tape runs at a speed of 95.3mm/sec which is about 4 times the speed of standard VHS SP (PAL) format. The initial tape formatting begins with a 15-second 'Lead' segment, followed by a 115-second'Data' segment of muted audio. Up to 44 minutes of 8-channel/track audio data can be recorded onto a three-hour S-VHS cassette (SE-180) .  \nAt replay, the linear tape speed is maintained by a servo control (CTL) signal recorded across a 1-millimeter linear track on the lower edge of the tape. The head cylinder rotation, however, is synchronized to the helical data signal tracks for accurate editing. As in an ordinary VHS-type helicalscan VCRs, ADAT rotary head gap angles are set at 12 degrees azimuth (±6°) to reduce the inter-track signal crosstalk to an insignificant level.  \nThe 62-milimeter head cylinder speed is 1800 R. P. M. or 30 R. P.S., creating a 5.75 meter/second head-totape speed. The cylinder contains 4 heads, spaced at 90-degree angles. The two opposing heads on the cylinder take care of writing the signal, while the other two read it. Effectively, one write head and one read head are in contact with the tape at any time.  \nFigure 1. ADAT rotating read/write head system.  \nThe write head gap width is specified at 100 micrometers – about four times wider than the read head gaps (Fig. 1) . The relatively wide recorded track pattern provides enhanced readout robustness; The system can endure relatively large tracking errors before the RF tape signal retrieval is interrupted.  \nThe four heads of ADAT head cylinder are needed for another reason, too. The format has been developed to accommodate assemble-type edit functions, where the start point of a new recording session can be joined to the end point of a previous one. Frame-accurate overdubs, however, were never intended for ADATs.  \nFigure 2. Comparison of ADAT and 8 mm R-DAT tape signal density.  \nProviding for sufficient data integrity  \nIn professional digital multi-track recorders, seamless (noiseless) fade-outs are a must. When a local muting, or re-recording of an individual track is required without data loss at edit points on the tape, the recorder has to accurately locate the end segments of previous recording sessions.  \nWith helical-scan recorders, there are further complications in editing old and compiling newly-recorded audio data together. Before recording, the seamless data stream has to be modulated into the 8/10 RLL format (Run-Length-Limited) . A new data may not be added as such, but needs to be concatenated with sync symbols, and appropriately generated and interleaved with error-correction data words.  \nIn short, new audio data cannot be added at randomly chosen points of tape without first reading and decoding larger ch","cbCaiaYdpIhKe0FJ","https://ap.wps.com/l/cbCaiaYdpIhKe0FJ","pdf",1128347,"English","# Helical-Scan Transport and Tape Medium\n## Recording Media and Reliability\n# Head System and Signal Integrity\n## Head Speed, Gap Widths, and Robust Readout\n## Assemble-Type Editing and Limitations\n# Providing for Sufficient Data Integrity\n## 8/10 RLL Formatting and Error Correction\n## Read-Before-Write Operation\n# The ADAT Interface\n## Optical Toslink Connections and Sampling Rates","[{\"question\":\"How does DigiOmmel transfer ADAT tape recordings into digital multi-track files?\",\"answer\":\"An Alesis XT 8-channel recorder is digitally connected to an E-MU 1820 audio interface to perform bit-for-bit transfer of ADAT tape recordings into more manageable multi-track file formats.\"},{\"question\":\"Why is ADAT editing handled with a read-before-write approach?\",\"answer\":\"Editing requires modulating a seamless data stream into 8/10 RLL format and using sync and error-correction words. Read-before-write prevents corruption at edit points by reading old material into buffer memory, formatting, concatenating new data, and rewriting the tape.\"},{\"question\":\"What is the “light pipe” ADAT interface and what does it transmit?\",\"answer\":\"ADAT uses Toslink optical connections based on a self-clocking serial protocol, transmitting multichannel sequential audio divisions. It can deliver up to 24 bits of digital audio data streams across eight discrete channels.\"}]","ADAT Tapes - Copied Digitally - Tape Recorder System Overview | PDF",13]