Creative Adpcm Wave Type Format - Creative SB0350 Programming Manual

B-12 File Format

Creative ADPCM Wave Type Format

WAVE_FORMAT_CREATIVE_ADPCM, the name for a new .WAV format tag,
0x0200 has been registered with Microsoft. The wave format header is typedef'ed with
An exploded view of the structure is laid out below:
Structure Members
wFormatTag
nChannels
nSamplesPerSec
nAvgBytesPerSec
nBlockAlign
wBitsPerSample
cbExtraSize
wRevision
This information should be in the latest release of the "Microsoft Multimedia Standards
Update". Where there are differences, this document is the final arbiter.
typedef struct creative_adpcmwaveformat_tag
{
WAVEFORMATEX
WORD
} CREATIVEADPCMWAVEFORMAT;
Description
WAVE_FORMAT_CREATIVE_ADPCM
Number of channels.
1 for mono, 2 for stereo.
Sampling frequency of the data.
Should be restricted to 8000, 11025, 22050 and 44100 Hz.
Average data rate.
Block alignment.
1 for both mono and stereo data.
Number of bits per sample.
The value is 4.
Number of bytes of extra information in the extended
WAVE 'fmt ' header.
The value is 2.
Revision of algorithm.
The value is zero for the current definition.
ewf;
wRevision;