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 This structure has been superseded by the WAVEFORMATEX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 ¾ 2 bytes per sample per channel
¾ 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
¾ 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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