Dat (Digital Audio Tape) - Yamaha DTR2 Owner's Manual

Professional series digital audio tape recorder

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DAT (Digital Audio Tape)

DAT cassettes

A DAT cassette measures 2-7/8" x 7/16" x 2-1/8" (73 mm x

10.5 mm x 54 mm), nearly half the size of analog audio

cassettes. Furthermore, the case is constructed to prevent

the tape from being scratched or soiled.

DAT recording scheme

In the DAT system, the head is rotated at high speed and

mounted at an angle with respect to the direction of tape

travel.

The PCM (audio signal) area is recorded with the digital

signal which has been converted from the audio signal.

(PCM=Pulse Code Modulation). The subcode areas are

recorded with information such as the tune number,

individual tune elapsed time and absolute time. The

subcode areas enable accurate tune searching since the

signals in the subcode areas are read while the tape is

moving.

Sampling frequencies

There are 3 sampling frequencies used when converting

analog audio signals to digital signals: 48 kHz, 44.1 kHz

and 32 kHz.

48 kHz: Used for commercially available DAT music tapes

or standard recorded DAT tapes.

44.1 kHz: Used for commercially available DAT music tapes

and CDs.

32 kHz: Used for satellite broadcasts.

At 32 kHz, this DAT deck can not record analog signals.

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