DAT & MiniDisc

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DAT

Holes (Open / Closed):

  • 1 : Reserved
  • 2 : Tape thickness
    • O : 9 µm
    • C : 13 µm (normal)
  • 3 : Track pitch
    • O : 20.41 µm (wide)
    • C : 13.591 µm (normal)
  • 4 : Identifies a prerecorded or not
    • O : Prerecorded
    • C : non-prerecorded
  • P : Write Protection
    • O : Protected
    • C : Not protected
  • A : Physical alignment

Tape Length (with standard re-recording speed of 8.15 mm/s):

  • 30 m -> 1 hr
  • 60 m -> 2 hr

DDS also has:

  • 90 m -> 3 hr

MiniDisc

ATRAC / DSP

  • ATRAC (SP) versions: V1, 2, 3, 3.5, 4, 4.5
  • ATRAC3 (LP2, LP4)
  • DSP Type R: Add 2-pass ATRAC for improved encoding, ATRAC3
  • DSP Type S: Includes Type R encoding and improved ATRAC3 decoding

See also here

Devices

  • Sony MDS-JB940 QS
    • Type R
  • Sony MZ-R501
    • Type R
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