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// Copyright 2006, Thomas Scott Stillwell
// All rights reserved.
//
//Redistribution and use in source and binary forms, with or without modification, are permitted
//provided that the following conditions are met:
//
//Redistributions of source code must retain the above copyright notice, this list of conditions
//and the following disclaimer.
//
//Redistributions in binary form must reproduce the above copyright notice, this list of conditions
//and the following disclaimer in the documentation and/or other materials provided with the distribution.
//
//The name of Thomas Scott Stillwell may not be used to endorse or
//promote products derived from this software without specific prior written permission.
//
//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
//IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
//FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
//BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
//(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
//PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
//STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
//THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
desc:7-band + HPF EQ, based on RBJ Filter Cookbook
slider1:10<10,120.0.1>HPF Freq
slider2:0<-15,15,0.1>100 Hz
slider3:0<-15,15,0.1>200 Hz
slider4:0<-15,15,0.1>400 Hz
slider5:0<-15,15,0.1>800 Hz
slider6:0<-15,15,0.1>2.5 kHz
slider7:0<-15,15,0.1>6 kHz
slider8:0<-15,15,0.1>12 kHz
@init
gain0 = 0;
freq0 = 20;
q0 = 1;
a0 = 1;
w00 = 2 * $pi * freq0/srate;
cosw00 = cos(w00);
sinw00 = sin(w00);
alpha0 = sinw00 / (2 * q0);
b00 = (1 + cosw00) / 2;
b10 = -(1 + cosw00);
b20 = (1 + cosw00) / 2;
a00 = 1 + alpha0;
a10 = -2 * cosw00;
a20 = 1 - alpha0;
b00 /= a00;
b10 /= a00;
b20 /= a00;
a10 /= a00;
a20 /= a00;
gain1 = 0;
freq1 = 100;
q1 = 0.8;
a1 = 10^(gain1/40);
w01 = 2 * $pi * freq1/srate;
cosw01 = cos(w01);
sinw01 = sin(w01);
alpha1 = sinw01 / (2 * q1);
b01 = 1 + alpha1 * a1;
b11 = -2 * cosw01;
b21 = 1 - alpha1 * a1;
a01 = 1 + alpha1 / a1;
a11 = -2 * cosw01;
a21 = 1 - alpha1 / a1;
b01 /= a01;
b11 /= a01;
b21 /= a01;
a11 /= a01;
a21 /= a01;
gain2 = 0;
freq2 = 200;
q2 = 0.8;
a2 = 10^(gain2/40);
w02 = 2 * $pi * freq2/srate;
cosw02 = cos(w02);
sinw02 = sin(w02);
alpha2 = sinw02 / (2 * q2);
b02 = 1 + alpha2 * a2;
b12 = -2 * cosw02;
b22 = 1 - alpha2 * a2;
a02 = 1 + alpha2 / a2;
a12 = -2 * cosw02;
a22 = 1 - alpha2 / a2;
b02 /= a02;
b12 /= a02;
b22 /= a02;
a12 /= a02;
a22 /= a02;
gain3 = 0;
freq3 = 400;
q3 = 0.8;
a3 = 10^(gain3/40);
w03 = 2 * $pi * freq3/srate;
cosw03 = cos(w03);
sinw03 = sin(w03);
alpha3 = sinw03 / (2 * q3);
b03 = 1 + alpha3 * a3;
b13 = -2 * cosw03;
b23 = 1 - alpha3 * a3;
a03 = 1 + alpha3 / a3;
a13 = -2 * cosw03;
a23 = 1 - alpha3 / a3;
b03 /= a03;
b13 /= a03;
b23 /= a03;
a13 /= a03;
a23 /= a03;
gain4 = 0;
freq4 = 800;
q4 = 0.8;
a4 = 10^(gain4/40);
w04 = 2 * $pi * freq4/srate;
cosw04 = cos(w04);
sinw04 = sin(w04);
alpha4 = sinw04 / (2 * q4);
b04 = 1 + alpha4 * a4;
b14 = -2 * cosw04;
b24 = 1 - alpha4 * a4;
a04 = 1 + alpha4 / a4;
a14 = -2 * cosw04;
a24 = 1 - alpha4 / a4;
b04 /= a04;
b14 /= a04;
b24 /= a04;
a14 /= a04;
a24 /= a04;
gain5 = 0;
freq5 = 2500;
q5 = 0.8;
a5 = 10^(gain5/40);
w05 = 2 * $pi * freq5/srate;
cosw05 = cos(w05);
sinw05 = sin(w05);
alpha5 = sinw05 / (2 * q5);
b05 = 1 + alpha5 * a5;
b15 = -2 * cosw05;
b25 = 1 - alpha5 * a5;
a05 = 1 + alpha5 / a5;
a15 = -2 * cosw05;
a25 = 1 - alpha5 / a5;
b05 /= a05;
b15 /= a05;
b25 /= a05;
a15 /= a05;
a25 /= a05;
gain6 = 0;
freq6 = 6000;
q6 = 0.8;
a6 = 10^(gain6/40);
w06 = 2 * $pi * freq6/srate;
cosw06 = cos(w06);
sinw06 = sin(w06);
alpha6 = sinw06 / (2 * q6);
b06 = 1 + alpha6 * a6;
b16 = -2 * cosw06;
b26 = 1 - alpha6 * a6;
a06 = 1 + alpha6 / a6;
a16 = -2 * cosw06;
a26 = 1 - alpha6 / a6;
b06 /= a06;
b16 /= a06;
b26 /= a06;
a16 /= a06;
a26 /= a06;
gain7 = 0;
freq7 = 12000;
q7 = 0.8;
a7 = 10^(gain7/40);
w07 = 2 * $pi * freq7/srate;
cosw07 = cos(w07);
sinw07 = sin(w07);
alpha7 = sinw07 / (2 * q7);
b07 = 1 + alpha7 * a7;
b17 = -2 * cosw07;
b27 = 1 - alpha7 * a7;
a07 = 1 + alpha7 / a7;
a17 = -2 * cosw07;
a27 = 1 - alpha7 / a7;
b07 /= a07;
b17 /= a07;
b27 /= a07;
a17 /= a07;
a27 /= a07;
@slider
freq0 = slider1;
gain1 = slider2;
gain2 = slider3;
gain3 = slider4;
gain4 = slider5;
gain5 = slider6;
gain6 = slider7;
gain7 = slider8;
gain0 = 0;
q0 = 1;
a0 = 1;
w00 = 2 * $pi * freq0/srate;
cosw00 = cos(w00);
sinw00 = sin(w00);
alpha0 = sinw00 / (2 * q0);
b00 = (1 + cosw00) / 2;
b10 = -(1 + cosw00);
b20 = (1 + cosw00) / 2;
a00 = 1 + alpha0;
a10 = -2 * cosw00;
a20 = 1 - alpha0;
b00 /= a00;
b10 /= a00;
b20 /= a00;
a10 /= a00;
a20 /= a00;
freq1 = 100;
q1 = 0.8;
a1 = 10^(gain1/40);
w01 = 2 * $pi * freq1/srate;
cosw01 = cos(w01);
sinw01 = sin(w01);
alpha1 = sinw01 / (2 * q1);
b01 = 1 + alpha1 * a1;
b11 = -2 * cosw01;
b21 = 1 - alpha1 * a1;
a01 = 1 + alpha1 / a1;
a11 = -2 * cosw01;
a21 = 1 - alpha1 / a1;
b01 /= a01;
b11 /= a01;
b21 /= a01;
a11 /= a01;
a21 /= a01;
freq2 = 200;
q2 = 0.8;
a2 = 10^(gain2/40);
w02 = 2 * $pi * freq2/srate;
cosw02 = cos(w02);
sinw02 = sin(w02);
alpha2 = sinw02 / (2 * q2);
b02 = 1 + alpha2 * a2;
b12 = -2 * cosw02;
b22 = 1 - alpha2 * a2;
a02 = 1 + alpha2 / a2;
a12 = -2 * cosw02;
a22 = 1 - alpha2 / a2;
b02 /= a02;
b12 /= a02;
b22 /= a02;
a12 /= a02;
a22 /= a02;
freq3 = 400;
q3 = 0.8;
a3 = 10^(gain3/40);
w03 = 2 * $pi * freq3/srate;
cosw03 = cos(w03);
sinw03 = sin(w03);
alpha3 = sinw03 / (2 * q3);
b03 = 1 + alpha3 * a3;
b13 = -2 * cosw03;
b23 = 1 - alpha3 * a3;
a03 = 1 + alpha3 / a3;
a13 = -2 * cosw03;
a23 = 1 - alpha3 / a3;
b03 /= a03;
b13 /= a03;
b23 /= a03;
a13 /= a03;
a23 /= a03;
freq4 = 800;
q4 = 0.8;
a4 = 10^(gain4/40);
w04 = 2 * $pi * freq4/srate;
cosw04 = cos(w04);
sinw04 = sin(w04);
alpha4 = sinw04 / (2 * q4);
b04 = 1 + alpha4 * a4;
b14 = -2 * cosw04;
b24 = 1 - alpha4 * a4;
a04 = 1 + alpha4 / a4;
a14 = -2 * cosw04;
a24 = 1 - alpha4 / a4;
b04 /= a04;
b14 /= a04;
b24 /= a04;
a14 /= a04;
a24 /= a04;
freq5 = 2500;
q5 = 0.8;
a5 = 10^(gain5/40);
w05 = 2 * $pi * freq5/srate;
cosw05 = cos(w05);
sinw05 = sin(w05);
alpha5 = sinw05 / (2 * q5);
b05 = 1 + alpha5 * a5;
b15 = -2 * cosw05;
b25 = 1 - alpha5 * a5;
a05 = 1 + alpha5 / a5;
a15 = -2 * cosw05;
a25 = 1 - alpha5 / a5;
b05 /= a05;
b15 /= a05;
b25 /= a05;
a15 /= a05;
a25 /= a05;
freq6 = 6000;
q6 = 0.8;
a6 = 10^(gain6/40);
w06 = 2 * $pi * freq6/srate;
cosw06 = cos(w06);
sinw06 = sin(w06);
alpha6 = sinw06 / (2 * q6);
b06 = 1 + alpha6 * a6;
b16 = -2 * cosw06;
b26 = 1 - alpha6 * a6;
a06 = 1 + alpha6 / a6;
a16 = -2 * cosw06;
a26 = 1 - alpha6 / a6;
b06 /= a06;
b16 /= a06;
b26 /= a06;
a16 /= a06;
a26 /= a06;
freq7 = 12000;
q7 = 0.8;
a7 = 10^(gain7/40);
w07 = 2 * $pi * freq7/srate;
cosw07 = cos(w07);
sinw07 = sin(w07);
alpha7 = sinw07 / (2 * q7);
b07 = 1 + alpha7 * a7;
b17 = -2 * cosw07;
b27 = 1 - alpha7 * a7;
a07 = 1 + alpha7 / a7;
a17 = -2 * cosw07;
a27 = 1 - alpha7 / a7;
b07 /= a07;
b17 /= a07;
b27 /= a07;
a17 /= a07;
a27 /= a07;
@sample
freq0 > 10 ? (
ospl0 = spl0;
spl0 = b00 * spl0 + b10 * xl10 + b20 * xl20 - a10 * yl10 - a20 * yl20;
xl20 = xl10;
xl10 = ospl0;
yl20 = yl10;
yl10 = spl0 ;
ospl1 = spl1;
spl1 = b00 * spl1 + b10 * xr10 + b20 * xr20 - a10 * yr10 - a20 * yr20;
xr20 = xr10;
xr10 = ospl1;
yr20 = yr10;
yr10 = spl1 ;
);
gain1 != 0 ? (
ospl0 = spl0;
spl0 = b01 * spl0 + b11 * xl11 + b21 * xl21 - a11 * yl11 - a21 * yl21;
xl21 = xl11;
xl11 = ospl0;
yl21 = yl11;
yl11 = spl0;
ospl1 = spl1;
spl1 = b01 * spl1 + b11 * xr11 + b21 * xr21 - a11 * yr11 - a21 * yr21;
xr21 = xr11;
xr11 = ospl1;
yr21 = yr11;
yr11 = spl1;
);
gain2 != 0 ? (
ospl0 = spl0;
spl0 = b02 * spl0 + b12 * xl12 + b22 * xl22 - a12 * yl12 - a22 * yl22;
xl22 = xl12;
xl12 = ospl0;
yl22 = yl12;
yl12 = spl0;
ospl1 = spl1;
spl1 = b02 * spl1 + b12 * xr12 + b22 * xr22 - a12 * yr12 - a22 * yr22;
xr22 = xr12;
xr12 = ospl1;
yr22 = yr12;
yr12 = spl1;
);
gain3 != 0 ? (
ospl0 = spl0;
spl0 = b03 * spl0 + b13 * xl13 + b23 * xl23 - a13 * yl13 - a23 * yl23;
xl23 = xl13;
xl13 = ospl0;
yl23 = yl13;
yl13 = spl0;
ospl1 = spl1;
spl1 = b03 * spl1 + b13 * xr13 + b23 * xr23 - a13 * yr13 - a23 * yr23;
xr23 = xr13;
xr13 = ospl1;
yr23 = yr13;
yr13 = spl1;
);
gain4 != 0 ? (
ospl0 = spl0;
spl0 = b04 * spl0 + b14 * xl14 + b24 * xl24 - a14 * yl14 - a24 * yl24;
xl24 = xl14;
xl14 = ospl0;
yl24 = yl14;
yl14 = spl0;
ospl1 = spl1;
spl1 = b04 * spl1 + b14 * xr14 + b24 * xr24 - a14 * yr14 - a24 * yr24;
xr24 = xr14;
xr14 = ospl1;
yr24 = yr14;
yr14 = spl1;
);
gain5 != 0 ? (
ospl0 = spl0;
spl0 = b05 * spl0 + b15 * xl15 + b25 * xl25 - a15 * yl15 - a25 * yl25;
xl25 = xl15;
xl15 = ospl0;
yl25 = yl15;
yl15 = spl0;
ospl1 = spl1;
spl1 = b05 * spl1 + b15 * xr15 + b25 * xr25 - a15 * yr15 - a25 * yr25;
xr25 = xr15;
xr15 = ospl1;
yr25 = yr15;
yr15 = spl1;
);
gain6 != 0 ? (
ospl0 = spl0;
spl0 = b06 * spl0 + b16 * xl16 + b26 * xl26 - a16 * yl16 - a26 * yl26;
xl26 = xl16;
xl16 = ospl0;
yl26 = yl16;
yl16 = spl0;
ospl1 = spl1;
spl1 = b06 * spl1 + b16 * xr16 + b26 * xr26 - a16 * yr16 - a26 * yr26;
xr26 = xr16;
xr16 = ospl1;
yr26 = yr16;
yr16 = spl1;
);
gain7 != 0 ? (
ospl0 = spl0;
spl0 = b07 * spl0 + b17 * xl17 + b27 * xl27 - a17 * yl17 - a27 * yl27;
xl27 = xl17;
xl17 = ospl0;
yl27 = yl17;
yl17 = spl0;
ospl1 = spl1;
spl1 = b07 * spl1 + b17 * xr17 + b27 * xr27 - a17 * yr17 - a27 * yr27;
xr27 = xr17;
xr17 = ospl1;
yr27 = yr17;
yr17 = spl1;
);