Digital Audio Tape - definizione. Che cos'è Digital Audio Tape
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Cosa (chi) è Digital Audio Tape - definizione

SIGNAL RECORDING AND PLAYBACK MEDIUM DEVELOPED BY SONY AND INTRODUCED IN 1987
Digital audio tape; DAT Cassette; 4mm tape; DAT recorder; Dat recorder; Digital tape recorder; DAT Tape; D/DAT; D/dat; ECMA-146
  • [[Aiwa]] HD-S1 portable DAT recorder from 1990 with DAT tape for size comparison. It is 146&#8239;mm high and 95&#8239;mm wide, the thickness is 38&#8239;mm.<ref>[http://www.datrecorders.co.uk/hds1.php Technical data of Aiwa HD-S1], from datrecorders.co.uk, retrieved on 27 January 2023</ref>
  • 250px
  • 150px
  • DAT Recorder (Kenwood DX-7030)
  • Sony DAT Walkman TCD-D7
  • US dollars]].<ref>[http://www.datrecorders.co.uk/pcm7030.php Data on Sony PCM-7030] at datrecorders.co.uk</ref>

digital audio tape         
Digital audio tape is a type of magnetic tape used to make very high quality recordings of sound by recording it in digital form. The abbreviation DAT
is often used.
N-UNCOUNT
Digital Audio Tape         
<storage, music> (DAT) A format for storing music on magnetic tape, developed in the mid-1980s by Sony and Philips. As digital music was popularized by compact discs, the need for a digital recording format for the consumer existed. The problem is that digital music contains over 5 megabytes of data per minute before error correction and supplementary information. Before DAT, the only way to record digitally was to use a video or a reel-to-reel recorder. DAT uses a rotary-head (or "helical scan") format, where the read/write head spins diagonally across the tape like a video cassette recorder. Thus the proper name is "R-DAT", where "R" for rotary distinguishes it from "S-DAT", a stationary design that did not make it out of the laboratories. Studio reel-to-reel decks are able to use stationary heads because they can have wider tape and faster tape speeds, but for the desired small medium of DAT the rotary-head compromise was made despite the potential problems with more moving parts. Most DAT recorders appear to be a cross between a typical analog cassette deck and a compact disc player. In addition to the music, one can record subcode information such as the number of the track (so one can jump between songs in a certain order) or absolute time (counted from the beginning of the tape). The tape speed is much faster than a regular deck (one can rewind 30 minutes of music in 10-25 seconds), though not quite as fast as a compact disc player. DAT decks have both analog and digital inputs and outputs. DAT tapes have only one recordable side and can be as long 120 minutes. DAT defines the following recording modes with the following performance specifications... 2 channel 48KHz Sample rate, 16-bit linear encoding 120 min max. Frequency Response 2-22KHz (+-0.5dB) SN = 93 dB DR = 93 dB 2 channel 44.1Khz Sample rate, 16-bit linear encoding 120 min max Frequency Response 2-22KHz (+-0.5dB) SN = 93 dB DR = 93 dB 2 channel 32KHz Sample Rate, 12-bit non-linear encoding 240 min max Frequency Response 2-14.5KHz (+-0.5dB) SN = 92 dB DR = 92 dB 4 channel 32KHz (not supported by any deck) DAT is also used for recording computer data. Most computer DAT recorders use DDS format which is the same as audio DAT but they usually have completely different connectors and it is not always possible to read tapes from one system on the other. Computer tapes can be used in audio machines but are usually more expensive. You can record for two minutes on each metre of tape. (1995-02-09)
Digital audio radio service         
Digital audio radio satellite; Digital Audio Radio Service; SDARS; S-DARS; Digital Satellite Broadcasting Corporation; Satellite Digital Audio Radio Service; Digital Audio Radio Satellite; Satellite digital audio radio service
Digital audio radio service (DARS) refers to any type of digital radio program service. In the United States it is the official FCC term for digital radio services.

Wikipedia

Digital Audio Tape

Digital Audio Tape (DAT or R-DAT) is a signal recording and playback medium developed by Sony and introduced in 1987. In appearance it is similar to a Compact Cassette, using 3.81 mm / 0.15" (commonly referred to as 4 mm) magnetic tape enclosed in a protective shell, but is roughly half the size at 73 mm × 54 mm × 10.5 mm. The recording is digital rather than analog. DAT can record at sampling rates equal to, as well as higher and lower than a CD (44.1, 48, or 32 kHz sampling rate respectively) at 16 bits quantization. If a comparable digital source is copied without returning to the analogue domain, then the DAT will produce an exact clone, unlike other digital media such as Digital Compact Cassette or non-Hi-MD MiniDisc, both of which use a lossy data-reduction system.

Like most formats of videocassette, a DAT cassette may only be recorded and played in one direction, unlike an analog compact audio cassette, although many DAT recorders had the capability to record program numbers and IDs, which can be used to select an individual track like on a CD player.

Although intended as a replacement for analog audio compact cassettes, the format was never widely adopted by consumers because of its expense, as well as concerns from the music industry about unauthorized high-quality copies. The format saw moderate success in professional markets and as a computer storage medium, which was developed into the Digital Data Storage format. As Sony has ceased production of new recorders, it will become more difficult to play archived recordings in this format unless they are copied to other formats or hard drives. Meanwhile, the phenomenon of sticky-shed syndrome has been noted by some engineers involved in re-mastering archival recordings on DAT, which presents a further threat to audio held exclusively in this medium.

Esempi dal corpus di testo per Digital Audio Tape
1. Hit Digital Audio Tape 1'80s: recordable digital tape, disliked by record labels.