slider1:0<-60,12,0.1>MID volume
slider2:0<-60,12,0.1>SIDE volume
slider3:0<0,2,1{Inline,MS from LR,MS to LR}>mode
slider4:0<-60,12,0.1>LR volume

in_pin:L in
in_pin:R in
out_pin:L out
out_pin:R out

@slider
vol1 = slider1 <= -60.0 ? 0.0 : 10 ^ (slider1 / 20);
vol2 = slider2 <= -60.0 ? 0.0 : 10 ^ (slider2 / 20);
vol3 = slider4 <= -60.0 ? 0.0 : 10 ^ (slider4 / 20);

@sample
slider3 == 0 ? (
tmp1 = ((spl0+spl1) * 0.5)*vol1;
tmp2 = ((spl0-spl1) * 0.5)*vol2;
spl0 = (tmp1 + tmp2)*vol3;
spl1 = (tmp1 - tmp2)*vol3;
);

slider3 == 1 ? (
tmp1=spl0;
tmp2=spl1;
spl0 = ((tmp1+tmp2) * 0.5)*vol1*vol3;
spl1 = ((tmp1-tmp2) * 0.5)*vol2*vol3;
);

slider3 == 2 ? (
tmp1= (spl0 + spl1)*vol1;
tmp2= (spl0 - spl1)*vol2;
spl0 = tmp1*vol3;
spl1 = tmp2*vol3;
);
