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WAVEFORMAT
The WAVEFORMAT structure describes the format of waveform-audio data. Only format
information common to all waveform-audio data formats is included in this structure. This
structure has been superseded by the WAVEFORMATEX structure.
typedef struct {
WORD wFormatTag;
WORD nChannels;
DWORD nSamplesPerSec;
DWORD nAvgBytesPerSec;
WORD nBlockAlign;
} WAVEFORMAT;
Members
wFormatTag
Format type. The following type is defined:
WAVE_FORMAT_PCM
Waveform-audio data is PCM.
nChannels
Number of channels in the waveform-audio data. Mono data uses one channel and
stereo data uses two channels.
nSamplesPerSec
Sample rate, in samples per second.
nAvgBytesPerSec
Required average data transfer rate, in bytes per second. For example, 16-bit
stereo at 44.1 kHz has an average data rate of 176,400 bytes per second (2
channels  2 bytes per sample per channel 44,100 samples per second).
nBlockAlign
Block alignment, in bytes. The block alignment is the minimum atomic unit of
data. For PCM data, the block alignment is the number of bytes used by a single
sample, including data for both channels if the data is stereo. For example,
the block alignment for 16-bit stereo PCM is 4 bytes (2 channels 2 bytes per sample).
Remarks
For formats that require additional information, this structure is included as
a member in another structure along with the additional information.
See Also
WAVEFORMATEX
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