/// <summary>
/// Create a Peaking EQ
/// </summary>
public static BiQuadFilter PeakingEQ(float sampleRate, float centreFrequency, float q, float dbGain)
{
var filter = new BiQuadFilter();
filter.SetPeakingEq(sampleRate, centreFrequency, q, dbGain);
return(filter);
}
/// <summary>
/// Create a bandpass filter with constant skirt gain
/// </summary>
public static BiQuadFilter BandPassFilterConstantSkirtGain(float sampleRate, float centreFrequency, float q)
{
var filter = new BiQuadFilter();
filter.SetBandPassFilter(sampleRate, centreFrequency, q);
return(filter);
}
/// <summary>
/// Create a High pass filter
/// </summary>
public static BiQuadFilter HighPassFilter(float sampleRate, float cutoffFrequency, float q)
{
var filter = new BiQuadFilter();
filter.SetHighPassFilter(sampleRate, cutoffFrequency, q);
return(filter);
}
public void SetHighpassMode(float cutoff)
{
Mode = FrequencyFilterMode.Highpass;
CutoffHigh = cutoff;
if (filter != null)
{
filter.SetHighPassFilter(Format.SampleRate, cutoff, 1);
}
else
{
filter = BiQuadFilter.HighPassFilter(Format.SampleRate, cutoff, 1);
}
}
public void SetBandpassMode(float cutoffLow, float cutoffHigh)
{
Mode = FrequencyFilterMode.Bandpass;
CutoffLow = cutoffLow;
CutoffHigh = cutoffHigh;
float center = cutoffLow + ((cutoffHigh - cutoffLow) / 2);
float q = center / (cutoffHigh - cutoffLow);
if (filter != null)
{
filter.SetBandPassFilter(Format.SampleRate, center, q);
}
else
{
filter = BiQuadFilter.BandPassFilterConstantSkirtGain(Format.SampleRate, center, q);
}
}
public void Disable()
{
Mode = FrequencyFilterMode.Disable;
filter = null;
}