dear teacher.. should it not be like this instead ?
- with the filter in the feedback lines ?
HEADM adc 2 2 mix-out mix1-out Empty Empty 1 adc-nullobj ;=0,0,100,0
MIX mix adc-in1 moddelay-out 0.5 0.5 ;=675,0,100,0
MIX mix1 adc-in2 moddelay1-out 0.5 0.5 ;=675,150,100,0
MIX mix2 adc-in1 filter1-out 0.5 0.5 ;=150,175,100,0
MIX mix3 adc-in2 filter-out 0.5 0.5 ;=150,400,100,0
FILTER filter moddelay-out 1000 1 0 ;=500,175,100,0
FILTER filter1 moddelay1-out 1000 1 0 ;=500,400,100,0
MODDELAY moddelay 20 mix2-out adc-null 20 0 1000 ;=350,150,100,0
MODDELAY moddelay1 20 mix3-out adc-null 20 0 1000 ;=350,375,100,0