DLS ID chunk (of a DLS file)

The DLS ID chunk contains a globally unique identifier for a DLS file or a DLS element (many DLS elements are chunks of the RIFF type LIST, which permits the inclusion of the DLS ID chunk).

The DLS ID chunk in the DLS file format has the following structure.

Byte sequence description Length in bytes Starts at byte in the chunk Value
chunk ID 4 0x00 The ASCII character string "dlsd"
size 4 0x04 The size of the chunk in number of bytes (unsigned integer) less 8 (less the size of "chunk ID" and the "size"). The size of this chunk is always 16.
DLS ID 16 0x08 The globally unique identifier of the UUID format.

The DLS ID itself, consistent with the UUID format, is 32 hexadecimal digits (16 bytes), typically written in five groups with hyphens between the groups: 8 digits-4 digits-4 digits-4 digits-12 digits.

DLS ID chunks are not required in a DLS file.

See also:
Downloadable Sounds (DLS) format

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