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/*
sonic enhancer thing
Copyright (C) 2011 lubomir i. ivanov
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
desc: Sonic Enhancer
slider1:0<-12, 12, 0.1>Input
slider2:0<0, 10, 0.1>Low Contour
slider3:0<0, 10, 0.1>Process
slider4:2<0, 10, 0.1>CV
slider5:0<-12, 12, 0.1>Output
slider6:1<0, 1, {Off,On})>Noise Floor
@init
r_6 = 1/6;
nf_k = pow(2, -96 * r_6);
rc0_k0 = 0.0003;
rc0_k1 = 1 - rc0_k0;
lp_fc = tan($pi * 0.48);
lp_r1pfc = 1 / (1 + lp_fc);
fc = 700;
fs = srate;
pi2 = 2*$pi;
q = 0.23;
omega = pi2 * fc / fs;
sn = sin(omega);
cs = cos(omega);
alpha = sn / (2.0 * Q);
b0_ap = 1.0 / (1.0 + alpha);
b1_ap = (-2.0 * cs) * b0_ap;
b2_ap = (1.0 - alpha) * b0_ap;
a0_ap = b2_ap;
a1_ap = b1_ap;
a2_ap = 1;
b0_lp = 1.0 / (1.0 + alpha);
b1_lp = (-2.0 * cs) * b0_lp;
b2_lp = (1.0 - alpha) * b0_lp;
a1_lp = (1.0 - cs) * b0_lp;
a0_lp = a1_lp * 0.5;
a2_lp = a0_lp;
b0_hp = 1.0 / (1.0 + alpha);
b1_hp = (-2.0 * cs) * b0_hp;
b2_hp = (1.0 - alpha) * b0_hp;
a1_hp = -(1.0 + cs) * b0_hp;
a0_hp = -a1_hp * 0.5;
a2_hp = a0_hp;
@slider
g_in = pow(2, slider1 * r_6);
g_lp = slider2*0.5;
g_hp = slider3*0.5;
cv_k = slider4;
g_out = pow(2, slider5 * r_6);
noise_floor = slider6;
@sample
in0 = spl0*g_in;
in1 = spl1*g_in;
nf0 = 0.0;
nf1 = 0.0;
noise_floor ? (
nf0 = (rand(2.0) - 1.0)*nf_k;
nf1 = (rand(2.0) - 1.0)*nf_k;
);
out_ap0 = a0_ap*in0 + a1_ap*x1_ap0 + a2_ap*x2_ap0 - b1_ap*y1_ap0 - b2_ap*y2_ap0;
x2_ap0 = x1_ap0;
x1_ap0 = in0;
y2_ap0 = y1_ap0;
y1_ap0 = out_ap0;
out_ap1 = a0_ap*in1 + a1_ap*x1_ap1 + a2_ap*x2_ap1 - b1_ap*y1_ap1 - b2_ap*y2_ap1;
x2_ap1 = x1_ap1;
x1_ap1 = in1;
y2_ap1 = y1_ap1;
y1_ap1 = out_ap1;
out_lp0 = a0_lp*in0 + a1_lp*x1_lp0 + a2_lp*x2_lp0 - b1_lp*y1_lp0 - b2_lp*y2_lp0;
x2_lp0 = x1_lp0;
x1_lp0 = in0;
y2_lp0 = y1_lp0;
y1_lp0 = out_lp0;
out_lp1 = a0_lp*in1 + a1_lp*x1_lp1 + a2_lp*x2_lp1 - b1_lp*y1_lp1 - b2_lp*y2_lp1;
x2_lp1 = x1_lp1;
x1_lp1 = in1;
y2_lp1 = y1_lp1;
y1_lp1 = out_lp1;
out_hp0 = a0_hp*in0 + a1_hp*x1_hp0 + a2_hp*x2_hp0 - b1_hp*y1_hp0 - b2_hp*y2_hp0;
x2_hp0 = x1_hp0;
x1_hp0 = in0;
y2_hp0 = y1_hp0;
y1_hp0 = out_hp0;
out_hp1 = a0_hp*in1 + a1_hp*x1_hp1 + a2_hp*x2_hp1 - b1_hp*y1_hp1 - b2_hp*y2_hp1;
x2_hp1 = x1_hp1;
x1_hp1 = in1;
y2_hp1 = y1_hp1;
y1_hp1 = out_hp1;
cv0 = 1 - abs(in0)*cv_k;
cv1 = 1 - abs(in1)*cv_k;
cv_rc0 = rc0_k0*cv0 + rc0_k1*cv_rc0;
cv_rc1 = rc0_k0*cv1 + rc0_k1*cv_rc1;
out_sv0 = out_ap0 + out_hp0*cv_rc0*g_hp + out_lp0*g_lp;
out_sv1 = out_ap1 + out_hp1*cv_rc1*g_hp + out_lp1*g_lp;
out_rc0 = rc0_k0*out_sv0 + rc0_k1*out_rc0;
out_rc1 = rc0_k0*out_sv1 + rc0_k1*out_rc1;
out_dc0 = out_sv0 - out_rc0;
out_dc1 = out_sv1 - out_rc1;
out_lp0 = (buf_lp0 + lp_fc*out_dc0) * lp_r1pfc;
buf_lp0 = lp_fc*(out_dc0 - out_lp0) + out_lp0;
out_lp1 = (buf_lp1 + lp_fc*out_dc1) * lp_r1pfc;
buf_lp1 = lp_fc*(out_dc1 - out_lp1) + out_lp1;
spl0 = out_lp0*g_out + nf0;
spl1 = out_lp1*g_out + nf1;
@gfx 0 10
gfx_r = 0.8;
gfx_g = 0.5;
gfx_b = 0;
gfx_a = min(1, 0.55 + cv_rc0*0.35 + g_hp*0.1);
gfx_x = 5;
gfx_y = 5;
gfx_rectto(gfx_w*0.5 - 3, gfx_h - 5);
gfx_a = min(1, 0.55 + cv_rc1*0.35 + g_hp*0.1);
gfx_x = gfx_w*0.5 + 3;
gfx_y = 5;
gfx_rectto(gfx_w - 5, gfx_h - 5);
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