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Update now highpass200Hz.eel #300

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Update now highpass200Hz.eel #300

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32 changes: 15 additions & 17 deletions resources/assets/liveprog/highpass200Hz.eel
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Original file line number Diff line number Diff line change
@@ -1,26 +1,23 @@
desc: High Pass Filter
author: djneba, adapted from @thepbone lowpass

freq:80<10,200,1>Cut-off frequency
qFactor:0.707<0.10,10.00,0.01>Q factor
slider1:freq=80<10,20000,1>Cut-off frequency (Hz)
slider2:qFactor=0.707<0.10,10.00,0.01>Q factor

@init
freq = 100;
qFactor = 1.00;

function HighPassFilter_Set(frequency qFactor)(
x = (frequency * 2.f * $PI) / srate;
function HighPassFilter_Set(frequency, qFactor) (
x = (frequency * 2 * $PI) / srate;
sinX = sin(x);
y = sinX / (qFactor * 2.f);
y = sinX / (qFactor * 2);
cosX = cos(x);
z = (1.f + cosX) / 2.f;

_a0 = y + 1.f;
_a1 = cosX * -2.f;
_a2 = 1.f - y;
_b0 = z;
_b1 = -(1.f + cosX);
_b2 = z;
z = (1 + cosX) / 2;

_a0 = y + 1;
_a1 = cosX * -2;
_a2 = 1 - y;
_b0 = z;
_b1 = -(1 + cosX);
_b2 = z;

this.y_2 = 0; this.y_1 = 0; this.x_2 = 0; this.x_1 = 0;
this.b0 = _b0 / _a0;
Expand All @@ -30,7 +27,7 @@ function HighPassFilter_Set(frequency qFactor)(
this.a2 = -_a2 / _a0;
);

function HighPassFilter_ProcessSample(sample)(
function HighPassFilter_ProcessSample(sample) (
out = sample * this.b0
+ this.x_1 * this.b1
+ this.x_2 * this.b2
Expand All @@ -45,6 +42,7 @@ function HighPassFilter_ProcessSample(sample)(
out;
);

@slider
hipass.HighPassFilter_Set(freq, qFactor);

@sample
Expand Down