Hello Csounders, I am relatively new in Csound and in the list, I  
am trying to equalize a soundfile using butterbp and butterbr but I  
don't understand how it functions because butterbp seems to work  
good enought but butterbr seems to work but do nothing,compiling I  
don't have any error but I can't hear any difference between the   
unprocessed and the processed soundfile.
Anyone can explain me what I am doing wrong?
Thanks.

;--------------Equalizer.orc ------------------------------------

sr= 44100
kr=4410
ksmps= 10
nchnls=1

instr 1

idur=p3
iamp=p4
iskiptime=p5
iattack=p6
irelease=p7
ifile=p8
icf1= p9
ibw1=p10
icf2= p11
ibw2= p12

asig1 soundin p8,p5

;afilt01 butterbr asig1,icf1,ibw1 ;butterbp works fine
;afilt02 butterbr asig1,icf2,ibw2

afilt01 butterbr asig1,icf1,ibw1  ;butterbr don.t seems to work
afilt02 butterbr asig1,icf2,ibw2

afilt1b balance afilt01,asig1
afilt2b balance afilt02,asig1

afilters=(afilt1b+afilt2b)/2

out afilters
endin

;---------------------- Equalizer.sco ----------------------------

; instr( p1 )  start( p2 )  dur( p3 )  amp( p4 ) skip( p5 ) atk( p6 ) 
   i1           0           20          1        0         .03       
;rel( p7 ) ifile( p8 )  centerfreq1( p9 ) bandwidth1( p10 )  
centerfreq2( p11 )
  .1          0              1000               100             2000
;bandwidth2 ( p12 )
   100
e

Marc Sola
msola@phonos.upf.es
http://phonos.upf.es/~msola