jsfx-plugins/krossen at master · akeda2/jsfx-plugins · GitHub

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desc: 2 stereo track mixer with crossfader

slider1:0<-90,10,0.1>Track 1 (channel 1,2) (dB)
slider2:0<-90,10,0.1>Track 2 (channel 3,4) (dB)
slider3:0<-40,40,0.1>Crossfade
slider4:0<-90,6,0.1>Gain/pad

in_pin:Track1-L;
in_pin:Track1-R;
in_pin:Track2-L;
in_pin:Track2-R;
out_pin:Left;
out_pin:Right;

@init
gainMax = 10;
gainMin = -90;
sliderPos = 0;
gainpad = 0;

@slider
slider1 < gainMin ? slider1 = gainMin;
slider1 > gainMax ? slider1 = gainMax;
levelT1 = 2 ^ ( slider1 / 6 );

slider2 < gainMin ? slider2 = gainMin;
slider2 > gainMax ? slider2 = gainMax;
levelT2 = 2 ^ ( slider2 / 6 );

slider3 < -40 ? slider3 = -40;
slider3 > 40 ? slider3 = 40;

mixPercent = slider3;
mixPercent == 40 ? mixPercent = 100;
mixPercent == -40 ? mixPercent = -100;

slider3 <= 0 ?
(
crossT1 = 1;
crossT2 = 2 ^ ( mixPercent/ 6 );
) :
(
crossT1 = 2 ^ ( -mixPercent / 6 );
crossT2 = 1;
);
gainpad =  10^(slider4/20);

@sample
// left mix
spl0 = ((spl0 * levelT1 * crossT1) + (spl2 * levelT2 * crossT2))*gainpad;

// right mix
spl1 = ((spl1 * levelT1 * crossT1) + (spl3 * levelT2 * crossT2))*gainpad;