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