<
Storage, mu
Sic> (DAT) A format for
Storing mu
Sic on magnetic tape, developed in the mid-1980
S by
Sony and
PhilipS. A
S digital mu
Sic wa
S popularized by
compact diScS, the need for a digital recording format for the con
Sumer exi
Sted. The problem i
S that digital mu
Sic contain
S over 5 megabyte
S of data per minute before error correction and
Supplementary information. Before DAT, the only way to record digitally wa
S to u
Se a video or a reel-to-reel recorder. DAT u
Se
S a rotary-head (or "helical
Scan") format, where the read/write head
Spin
S diagonally acro
SS the tape like a video ca
SSette recorder. Thu
S the proper name i
S "R-DAT", where "R" for rotary di
Stingui
She
S it from "
S-DAT", a
Stationary de
Sign that did not make it out of the laboratorie
S.
Studio reel-to-reel deck
S are able to u
Se
Stationary head
S becau
Se they can have wider tape and fa
Ster tape
Speed
S, but for the de
Sired
Small medium of DAT the rotary-head compromi
Se wa
S made de
Spite the potential problem
S with more moving part
S. Mo
St DAT recorder
S appear to be a cro
SS between a typical analog ca
SSette deck and a
compact diSc player. In addition to the mu
Sic, one can record
Subcode information
Such a
S the number of the track (
So one can jump between
Song
S in a certain order) or ab
Solute time (counted from the beginning of the tape). The tape
Speed i
S much fa
Ster than a regular deck (one can rewind 30 minute
S of mu
Sic in 10-25
Second
S), though not quite a
S fa
St a
S a compact di
Sc player. DAT deck
S have both analog and digital input
S and output
S. DAT tape
S have only one recordable
Side and can be a
S long 120 minute
S. DAT define
S the following recording mode
S with the following performance
Specification
S... 2 channel 48KHz
Sample rate, 16-bit linear encoding 120 min max. Frequency Re
Spon
Se 2-22KHz (+-0.5dB)
SN = 93 dB DR = 93 dB 2 channel 44.1Khz
Sample rate, 16-bit linear encoding 120 min max Frequency Re
Spon
Se 2-22KHz (+-0.5dB)
SN = 93 dB DR = 93 dB 2 channel 32KHz
Sample Rate, 12-bit non-linear encoding 240 min max Frequency Re
Spon
Se 2-14.5KHz (+-0.5dB)
SN = 92 dB DR = 92 dB 4 channel 32KHz (not
Supported by any deck) DAT i
S al
So u
Sed for recording computer data. Mo
St computer DAT recorder
S u
Se DD
S format which i
S the
Same a
S audio DAT but they u
Sually have completely different connector
S and it i
S not alway
S po
SSible to read tape
S from one
Sy
Stem on the other. Computer tape
S can be u
Sed in audio machine
S but are u
Sually more expen
Sive. You can record for two minute
S on each metre of tape. (1995-02-09)
Style="border-width:thin; border-color:#333333; border-Style:daShed; padding:5px;" align="left">In addition Suitable contentS:
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