Source: MiniDisc Wiki contributors · September 3, 2026 snapshot · CC BY 4.0, except where otherwise credited.
Attribution and changes
Adapted from “Magneto Optical (MO) disc scratchpad”. Links, layout and file names normalized; missing database fields restored; remote embeds replaced with links. Manufacturer manuals and separately credited photographs retain their original attribution.
One cluster is 36 sectors, 32 sectors for data 4 for link and sub data. The 4 are different between MO and premastered discs.
Each sector contains 2352 bytes, 20 for addressing+control and 2332 byes of which are data bytes. • The first 12 bytes are a unique sync pattern.
• The next 4 bytes are header bytes, containing three address bytes (two clusters, one sector) and a mode byte.
• The mode byte describes the nature of the data fields.
• Between the header bytes and the actual data bytes, four all zero bytes are inserted.
Sound group's are the smallest division containing 424 bytes (212 left, 212 right channel). A sound group gives ATRAC-compressed audio data equal to 512 uncompressed samples at 44.1 kHz sampling rate.
0xdc4 sectors - 3524
Additional specifications and references
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