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waveOutSetPitch
The waveOutSetPitch function sets the pitch for the specified waveform-audio output device.
MMRESULT waveOutSetPitch(
HWAVEOUT hwo,
|
| DWORD dwPitch
|
| );
|
|
Parameters
hwo
Handle of the waveform-audio output device.
dwPitch
New pitch multiplier setting. This setting indicates the current change in
pitch from the original authored setting. The pitch multiplier must be a positive
value.
The pitch multiplier is specified as a fixed-point value. The high-order word
contains the signed integer part of the number, and the low-order word contains
the fractional part. A value of 0x8000 in the low-order word represents
one-half, and 0x4000 represents one-quarter. For example, the value 0x00010000
specifies a multiplier of 1.0 (no pitch change), and a value of 0x000F8000 specifies
a multiplier of 15.5.
Return Values
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible error
values include the following:
MMSYSERR_INVALHANDLE
| Specified device handle is invalid.
| MMSYSERR_NODRIVER
| No device driver is present.
| MMSYSERR_NOMEM
| Unable to allocate or lock memory.
| MMSYSERR_NOTSUPPORTED
| Function isn't supported.
|
Remarks
Changing the pitch does not change the playback rate or the sample rate, nor
does it change the playback time. Not all devices support pitch changes. To
determine whether the device supports pitch control, use the WAVECAPS_PITCH flag to
test the dwSupport member of the WAVEOUTCAPS structure (filled by the waveOutGetDevCaps function).
See Also
WAVEOUTCAPS, waveOutGetDevCaps
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