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.
float XAudio2CutoffFrequencyToOnePoleCoefficient( float CutoffFrequency, UINT32 SampleRate );
The cutoff frequency in hertz. Frequencies greater than SampleRate are clamped to XAUDIO2_MAX_FILTER_FREQUENCY.
The sample rate of the audio data affected by the XAUDIO2_FILTER_PARAMETERS structure.
Returns a filter coefficient for use in the XAUDIO2_FILTER_PARAMETERS structure.
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.
Windows 8, Windows Phone 8 (XAudio 2.8); DirectX SDK (XAudio 2.7)