jsfx-plugins/krossen-orig 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<-100,100,0.1>Crossfade

@init
gainMax = 10;
gainMin = -90;

@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 < -100 ? slider3 = -100;
slider3 > 100 ? slider3 = 100;
slider3 <= 0 ?
  (
    crossT1 = 1;
    crossT2 = 2 ^ ( slider3 / 6 );
  ) :
  (
    crossT1 = 2 ^ ( -slider3 / 6 );
    crossT2 = 1;
  );

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

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