|
waveOutGetPitch
The waveOutGetPitch function retrieves the current pitch setting for the specified waveform-audio
output device.
MMRESULT waveOutGetPitch(
HWAVEOUT hwo,
|
| LPDWORD pdwPitch
|
| );
|
|
Parameters
hwo
Handle of the waveform-audio output device.
pdwPitch
Address of a variable to be filled with the current pitch multiplier setting.
The pitch multiplier 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
of the variable 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, sample rate, or 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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