Re: alpass problem??

I think if figured out the problem.  It seems like whenever I route 
audio through a channel higher than 100 the signal is corrupted.  I had 
the zak mixer set to use 110 channels in my orc file.  Nevertheless it 
would still corrupt the audio.  So, I guess the max number of channels 
is 100.  If anyone can correct me on this, I welcome your input.  I'm 
using ver 4.20 on linux.

peace,

-- 
gerald wenzel
@pplication specific - music is necessary
http://apspec.com


gerald wenzel wrote:

> Hello all.  I'm working on a track that can be rendered solely from a  
> csound sco and orc files.  I want to add a dub feel to track so I  
> decided to send all of the audio through a reverberator that uses the  
> alpass opcode.  I'm using a zak mixer to channel the audio.  Sending 
> all  the audio through the alpass did indeed create a dubby feel.  
> However,  the output seemed heavy on the low end.  So, after the 
> alpass  reverberator I sent the audio through a highpass filter.  When 
> I do this  I get a bunch of samples out of range and the highpass 
> doesn't even seem  to be working right.  If I lower the output on the 
> alpass filter to keep  samples from going out of range, things sound 
> really bassy and it  actually sounds like the highs are being 
> filtered.  I also noticed a high pitch....like feedback???  If I use 
> these  intruments by themselves the track sounds okay and the 
> instruments seem  to work, but if i route the audio to my highpass 
> filter after using the  alpass reverb it doesn't work.  Any ideas why? 
> 
> 
> here are the orc files and the lines from the sco that call them:
> ;allpass Reverberator
> ;-------------------------------------------------------------------------- 
> 
> ;instr    str       dur          amp   rise    decay     rvb_time 
> loop_time inchl inchr outchl outchr
> i1101   0.000   162.000  .01     0.000 0.000    .5              [.125] 
>       99    100     101    102  
> ;-------------------------------------------------------------------------- 
> 
> ;HIGH PASS BUTTERWORTH FILTER
> ;-------------------------------------------------------------------------- 
> 
> ;             strt    dur    amp    rise    decay    filtstr        
> filtend        inchl    inchr    outchl    outchr    balon
> i1103     0        162   .1         0           0         50           
> 50              101      102       103        104         0
> 
> 
> 
> #define        alpass_reverb(i)    #
> 
> ;--------------------------------------------------------------------------- 
>      ; allpass Reverb
> ;--------------------------------------------------------------------------- 
>         instr     $i.
> idur        =        p3    iamp        =         p4    irise          
> =         p5    idec          =         p6    irvt          =         
> p7   iloop_time    =        p8
> iinchl      =         p9    iinchr      =         p10    ioutchl      
> =         p11    ioutchr      =         p12         ;convert linen 
> envelope parameters to percentages of the total duration of note       
> irise         =         irise * idur   idec         =         idec * 
> idur   kvol         linen         iamp, irise, idur, idec
>      asigl         zar         iinchl     asigr         zar         
> iinchr          ;scale the signal       aleft         alpass        
> asigl, irvt, iloop_time   aright         alpass        asigr, irvt, 
> iloop_time  
> ;aleft         alpass        asigl, 4, .025  ;aright         
> alpass        asigr, 4, .025               zawm        (aleft * kvol), 
> ioutchl        zawm         (aright * kvol), ioutchr    
> endin                   #
> 
> #define        high_pass_filter(i)    #
> 
> ; HIGH PASS FILTER with balanced output      
>   instr    $i.                   idur        =        
> p3                       iamp        =        p4                       
> irise        =        p5                       idec        =        
> p6                       ifiltstr    =        p7                       
> ifiltend    =        p8                       iinchl        =        
> p9                       iinchr        =        
> p10                       ioutchl        =        
> p11                       ioutchr        =        
> p12                       ibalon        =        
> p13                                                    ;convert linen 
> envelope parameters to percentages of the total duration of sound 
> object                               irise        =        irise * 
> idur               idec        =        idec * idur               
>                              ;volume 
> envelope                               kvol        linen        iamp, 
> irise, idur, idec
> asigl        zar        iinchl                       asigr        
> zar        iinchr                                                    
> ;high pass butterworth line                               kfilt        
> line        ifiltstr, idur, ifiltend       afiltl        butterhp    
> asigl, kfilt               afiltr        butterhp    asigr, 
> kfilt                                            if ibalon = 0    
> kgoto        nobalancing                                        
> aball        balance        asigl, afiltl               abalr        
> balance        asigr, afiltr               afiltl        =        
> aball                       afiltr        =        
> abalr                                                    
> nobalancing:                                     zawm        
> (afiltl    * kvol), ioutchl             zawm        (afiltr    * 
> kvol), ioutchr         endin            #              
> 



_______________________________________________
csoundtekno mailing list
[email protected]

Subscribe, unsubscribe, change mailing list options:
http://plot.bek.no/mailman/listinfo/csoundtekno