negative values for linsegr

[Stefan Thomas-2]

Dear community,
I've looked into the ModalAddSyn-opcode, that I've found here on of Iain McCurdys site.
Within the code a found the lines:

if isus==1 then
      adec    linsegr    0,iattScl*iatt,0,(p3*idur)-(iattScl*iatt),-98,(p3*idur)-(iattScl*iatt),-98    ;AMPLITUDE DECAY ENVELOPE
    else
      adec    linsegr    0,iattScl*iatt,0,(p3*idur)-(iattScl*iatt),-98,idur*0.4,-98        ;AMPLITUDE DECAY ENVELOPE
    endif

   
What I don't understand is: what do those negative values (-98) mean in linsegr?
I would have assumed, that the p-fields of linsegr can only be positive!

[joachim-3]

hi stefan -
the *durations* in linseg(r) can just be positive, but not the *values*.
so, it's possible to write
kbla linseg -1, p3, -5
but not
knono linseg 1, -1, 5

        joachim

Am 18.02.2012 17:00, schrieb Stefan Thomas:

> Dear community,
> I've looked into the ModalAddSyn-opcode, that I've found here
> <http://iainmccurdy.org/csound.html#ModalAddSyn.csd> on of Iain McCurdys
> site.
> Within the code a found the lines:
>
>     if isus==1 then
>           adec    linsegr  
>     0,iattScl*iatt,0,(p3*idur)-(iattScl*iatt),-98,(p3*idur)-(iattScl*iatt),-98  
>     ;AMPLITUDE DECAY ENVELOPE
>         else
>           adec    linsegr  
>     0,iattScl*iatt,0,(p3*idur)-(iattScl*iatt),-98,idur*0.4,-98      
>     ;AMPLITUDE DECAY ENVELOPE
>         endif
>
>    
> What I don't understand is: what do those negative values (-98) mean in
> linsegr?
> I would have assumed, that the p-fields of linsegr can only be positive!

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