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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