Track-Control Information

The Track-Control Information byte corresponds to the byte in the TOC lead-in track containing the two 4-bit control field and ADR. The Control information is in the most-significant 4 bits, and the ADR information is in the least-significant 4 bits. The track-control information is encoded as shown in the following table:

┌───────────────┬─────────────────────────────────────────────┐
│Bit            │Description                                  │
├───────────────┼─────────────────────────────────────────────┤
│7              │0 = Two-channel audio                        │
│               │1 = Four-channel audio                       │
├───────────────┼─────────────────────────────────────────────┤
│6              │0 = Audio track                              │
│               │1 = Data track                               │
├───────────────┼─────────────────────────────────────────────┤
│5              │0 = Digital copy prohibited                  │
│               │1 = Digital copy permitted                   │
├───────────────┼─────────────────────────────────────────────┤
│4              │0 = Audio without preemphasis                │
│               │1 = Audio with preemphasis                   │
├───────────────┼─────────────────────────────────────────────┤
│3-0            │ADR data for track                           │
└───────────────┴─────────────────────────────────────────────┘