Creative Voice file


Creative Voice, filename extension .voc is an audio format for digital audio data for developed in the 1990s Sound Blaster - sound cards from Creative Technology.

Construction

Original-Format (8-Bit)

The file format consists of a 26-byte header and a series of subsequent data blocks containing the audio information. The byte order is Little Endian.
Offset Length content
0x0019ASCII-StringCreative Voice File
0x1331A 1A 00
0x162, hexadecimal;
For Example: 0x010a, Version 1.10
0x182Validation: ~Version + 0x1234, hexadecimal, truncated to 16-bit;
For Example: 0x1129

The header is followed by data blocks. Each data block begins with a type byte describing the contents of the data, followed by 3 bytes for the size of the data. For two of the 9 defined types, the subsequent size of the data is missing, so the block ultimately consists of only a single byte - these are 0x00the terminator, and 0x07the repeat end.
If a size is specified, the first 4 bytes will be followed by a block of the content resulting from the specified type with the specified size.
The file optionally ends with the terminator block

Use

The spread of the file format disappeared noticeably with the advent of RIFF WAVE, which was already supported in Windows by Microsoft operating system. However, the Creative Voice file format required the installation of additional player programs included with the Sound Blaster Card drivers. With the advent of AC'97, WAVE, file extension .WAV, finally prevailed.