   < Score11 file used to create Eastman Csound Tutorial soundfile example
   < ex5-1 : low pass filter (tone)
*f1 0 65 7 0 64 1;
* f2 0 65 7 0 32 1. 32 0;
* f3 0 65 5 .01 32 1. 32 .01;

i39 0 0 4;              < mono input, mono output
p3 3.5;                                                     
du 303;                                                                   
p4 5;    < soundin.# : soundin.5 points to /sflib/perc/tam.wav 
p5 .9;                                    < ampfac
p6 .5;                                    < duration skipped from front of sf
p7 1.;                                    < fade in time
p8 1.;                                  < fade out time

< "tone" p-fields :
p9 nu  100/ 2000/ 2000/200;        < 1st half-power point
p10 nu 3000/ 150 / 100/900;       < 2nd  "  "     "
p11 nu  0  /  0 / .75/4.;          < rate of change (0 = 1/p3)
p12 nu  1  /  2 / 3 /  / ;      < function for change
end;
