jsfx-plugins/4mix at master · akeda2/jsfx-plugins · GitHub

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desc:4-channel to stereo mixer 1,2 is L,R. 3 is Center. 4 is (optional) spot.

import cookdsp.jsfx-inc


in_pin:Left
in_pin:Right
in_pin:Center
in_pin:Spot
out_pin:Left
out_pin:Right

slider1:-1.6<-90,10,0.2>Stereo-LR
slider2:-1.6<-90,10,0.2>Center
slider3:-90<-90,32,0.2>Spot
slider4:0<-12,12,0.1>Crossfade: L,R <-|-> Center
slider5:0<0,2,1{off,6dB/oct,12dB/oct>Spot Low-cut
slider6:120<40,300,1>Spot LC frequency (Hz)

@init
bpos=0;
slp6.lop(slider6);
slp12.buthp(slider6);


@slider
stereolevel = 10^(slider1/20);
centerlevel = 10^(slider2/20);
spotlevel = 10^(slider3/20);
slp6.lop_set_freq(slider6);
slp12.buthp_set_freq(slider6);

//Crossfade:
slider4 < -40 ? slider4 = -40;
slider4 > 40 ? slider4 = 40;

mixPercent = slider4;
mixPercent == 40 ? mixPercent = 100;
mixPercent == -40 ? mixPercent = -100;
slider4 <= 0 ?
(
crossT1 = 1;
crossT2 = 2 ^ ( mixPercent/ 6 );
) :
(
crossT1 = 2 ^ ( -mixPercent / 6 );
crossT2 = 1;
);


@block
blah+=samplesblock;

@sample
//inputs
inL = spl0;
inR = spl1;
inC = spl2;
inSpot = spl3;
//HP
slider5 != 0 ? (
  slider5 == 1 ? (
   inSpot = slp6.lop_do(inSpot);
   );
 inSpot = slp12.buthp_do(inSpot);
);

//output
spl0 = (inL*stereolevel*crossT1) + (inC*centerlevel*crossT2) + (inSpot*spotlevel);
spl1 = (inR*stereolevel*crossT1) + (inC*centerlevel*crossT2) + (inSpot*spotlevel);
spl2 = null;
spl3 = null;