XAudio2CutoffFrequencyToOnePoleCoefficient function
Inline function that converts from filter cutoff frequencies expressed in hertz to the filter coefficients used with the Frequency member of the XAUDIO2_FILTER_PARAMETERS structure.
This function applies to LowPassOnePoleFilter and HighPassOnePole filter types only, use XAudio2CutoffFrequencyToRadians for state-variable filter types.
Syntax
float XAudio2CutoffFrequencyToOnePoleCoefficient( float CutoffFrequency, UINT32 SampleRate );
Parameters
- CutoffFrequency
-
The cutoff frequency in hertz. Frequencies greater than SampleRate are clamped to XAUDIO2_MAX_FILTER_FREQUENCY.
- SampleRate
-
The sample rate of the audio data affected by the XAUDIO2_FILTER_PARAMETERS structure.
Return value
Returns a filter coefficient for use in the XAUDIO2_FILTER_PARAMETERS structure.
Remarks
You must explicitly define XAUDIO2_HELPER_FUNCTIONS in your build for this function to become available.
The DirectX SDK versions of XAUDIO2 do not support one-pole filters, so this function is not present in those releases.
Platform Requirements
Windows 10 (XAudio2.9); Windows 8, Windows Phone 8 (XAudio 2.8); DirectX SDK (XAudio 2.7)
Requirements
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See also